T43/E38 6L90 Shift points change

[55chevdelray]

Any idea how to change the shift points at WOT for the 6L90? I'm thinking I should have bought HPT.

[MSURacing]

LABELS 1>2 WOT Shift (a)
Parameters Value
{D1100} 1>2 WOT Shift (a) 26.845169 MPH
{D1101} 1>2 WOT Shift (b) 26.845169 MPH
{D1120} 1>2 WOT Pattern A Shift (a) 26.097582 MPH
{D1121} 1>2 WOT Pattern A Shift (b) 26.097582 MPH
{D1140} 1>2 WOT Pattern B Shift (a) 29.825808 MPH
{D1141} 1>2 WOT Pattern B Shift (b) 29.825808 MPH
{D1160} 1>2 WOT TUTD Shift (a) 18.019759 MPH
{D1161} 1>2 WOT TUTD Shift (b) 18.019759 MPH
{D1180} 1>2 WOT Hot Shift (a) 27.961695 MPH
{D1181} 1>2 WOT Hot Shift (b) 27.961695 MPH
{D1110} 2>1 WOT Shift (a) 23.612098 MPH
{D1111} 2>1 WOT Shift (b) 23.612098 MPH
{D1130} 2>1 WOT Pattern A Shift (a) 17.398388 MPH
{D1131} 2>1 WOT Pattern A Shift (b) 17.398388 MPH
{D1150} 2>1 WOT Pattern B Shift (a) 26.718953 MPH
{D1151} 2>1 WOT Pattern B Shift (b) 26.718953 MPH
{D1170} 2>1 WOT TUTD Shift (a) 18.019759 MPH
{D1171} 2>1 WOT TUTD Shift (b) 18.019759 MPH
{D1190} 2>1 WOT Hot Shift (a) 21.811093 MPH
{D1191} 2>1 WOT Hot Shift (b) 21.811093 MPH
{D1102} 2>3 WOT Shift (a) 52.816535 MPH
{D1103} 2>3 WOT Shift (b) 52.816535 MPH
{D1122} 2>3 WOT Pattern A Shift (a) 48.466938 MPH
{D1123} 2>3 WOT Pattern A Shift (b) 48.466938 MPH
{D1142} 2>3 WOT Pattern B Shift (a) 57.166132 MPH
{D1143} 2>3 WOT Pattern B Shift (b) 57.166132 MPH
{D1162} 2>3 WOT TUTD Shift (a) 55.302019 MPH
{D1163} 2>3 WOT TUTD Shift (b) 55.302019 MPH
{D1182} 2>3 WOT Hot Shift (a) 48.093144 MPH
{D1183} 2>3 WOT Hot Shift (b) 48.093144 MPH
{D1112} 3>2 WOT Shift (a) 49.709680 MPH
{D1113} 3>2 WOT Shift (b) 49.709680 MPH
{D1132} 3>2 WOT Pattern A Shift (a) 43.495970 MPH
{D1133} 3>2 WOT Pattern A Shift (b) 43.495970 MPH
{D1152} 3>2 WOT Pattern B Shift (a) 52.816535 MPH
{D1153} 3>2 WOT Pattern B Shift (b) 52.816535 MPH
{D1172} 3>2 WOT TUTD Shift (a) 51.573793 MPH
{D1173} 3>2 WOT TUTD Shift (b) 51.573793 MPH
{D1192} 3>2 WOT Hot Shift (a) 46.976618 MPH
{D1193} 3>2 WOT Hot Shift (b) 46.976618 MPH
{D1104} 3>4 WOT Shift (a) 79.535487 MPH
{D1105} 3>4 WOT Shift (b) 79.535487 MPH
{D1124} 3>4 WOT Pattern A Shift (a) 76.428632 MPH
{D1125} 3>4 WOT Pattern A Shift (b) 76.428632 MPH
{D1144} 3>4 WOT Pattern B Shift (a) 79.535487 MPH
{D1145} 3>4 WOT Pattern B Shift (b) 79.535487 MPH
{D1164} 3>4 WOT TUTD Shift (a) 90.098794 MPH
{D1165} 3>4 WOT TUTD Shift (b) 90.098794 MPH
{D1184} 3>4 WOT Hot Shift (a) 81.647178 MPH
{D1185} 3>4 WOT Hot Shift (b) 81.647178 MPH
{D1114} 4>3 WOT Shift (a) 71.457664 MPH
{D1115} 4>3 WOT Shift (b) 71.457664 MPH
{D1134} 4>3 WOT Pattern A Shift (a) 71.457664 MPH
{D1135} 4>3 WOT Pattern A Shift (b) 71.457664 MPH
{D1154} 4>3 WOT Pattern B Shift (a) 73.321777 MPH
{D1155} 4>3 WOT Pattern B Shift (b) 73.321777 MPH
{D1174} 4>3 WOT TUTD Shift (a) 80.778229 MPH
{D1175} 4>3 WOT TUTD Shift (b) 80.778229 MPH
{D1194} 4>3 WOT Hot Shift (a) 75.496576 MPH
{D1195} 4>3 WOT Hot Shift (b) 75.496576 MPH
{D1106} 4>5 WOT Shift (a) 93.205649 MPH
{D1107} 4>5 WOT Shift (b) 93.205649 MPH
{D1126} 4>5 WOT Pattern A Shift (a) 93.205649 MPH
{D1127} 4>5 WOT Pattern A Shift (b) 93.205649 MPH
{D1146} 4>5 WOT Pattern B Shift (a) 93.205649 MPH
{D1147} 4>5 WOT Pattern B Shift (b) 93.205649 MPH
{D1166} 4>5 WOT TUTD Shift (a) 93.205649 MPH
{D1167} 4>5 WOT TUTD Shift (b) 93.205649 MPH
{D1186} 4>5 WOT Hot Shift (a) 108.492347 MPH
{D1187} 4>5 WOT Hot Shift (b) 108.492347 MPH
{D1116} 5>4 WOT Shift (a) 91.962907 MPH
{D1117} 5>4 WOT Shift (b) 91.962907 MPH
{D1136} 5>4 WOT Pattern A Shift (a) 98.176617 MPH
{D1137} 5>4 WOT Pattern A Shift (b) 98.176617 MPH
{D1156} 5>4 WOT Pattern B Shift (a) 91.962907 MPH
{D1157} 5>4 WOT Pattern B Shift (b) 91.962907 MPH
{D1176} 5>4 WOT TUTD Shift (a) 76.428632 MPH
{D1177} 5>4 WOT TUTD Shift (b) 76.428632 MPH
{D1196} 5>4 WOT Hot Shift (a) 91.715330 MPH
{D1197} 5>4 WOT Hot Shift (b) 91.715330 MPH
{D1108} 5>6 WOT Shift (a) 318.137095 MPH
{D1109} 5>6 WOT Shift (b) 318.137095 MPH
{D1128} 5>6 WOT Pattern A Shift (a) 318.137095 MPH
{D1129} 5>6 WOT Pattern A Shift (b) 318.137095 MPH
{D1148} 5>6 WOT Pattern B Shift (a) 318.137095 MPH
{D1149} 5>6 WOT Pattern B Shift (b) 318.137095 MPH
{D1168} 5>6 WOT TUTD Shift (a) 158.449604 MPH
{D1169} 5>6 WOT TUTD Shift (b) 158.449604 MPH
{D1188} 5>6 WOT Hot Shift (a) 317.520579 MPH
{D1189} 5>6 WOT Hot Shift (b) 317.520579 MPH
{D1118} 6>5 WOT Shift (a) 317.520579 MPH
{D1119} 6>5 WOT Shift (b) 317.520579 MPH
{D1138} 6>5 WOT Pattern A Shift (a) 317.520579 MPH
{D1139} 6>5 WOT Pattern A Shift (b) 317.520579 MPH
{D1158} 6>5 WOT Pattern B Shift (a) 317.520579 MPH
{D1159} 6>5 WOT Pattern B Shift (b) 317.520579 MPH
{D1178} 6>5 WOT TUTD Shift (a) 76.428632 MPH
{D1179} 6>5 WOT TUTD Shift (b) 76.428632 MPH
{D1198} 6>5 WOT Hot Shift (a) 316.899208 MPH
{D1199} 6>5 WOT Hot Shift (b) 316.899208 MPH

LABELS 1>2 WOT Shift (a)
Parameters Value
{D1200} 1>2 WOT Shift (a) 5600.000000 RPM
{D1201} 1>2 WOT Shift (b) 5600.000000 RPM
{D1210} 1>2 WOT Pattern A Shift (a) 5000.000000 RPM
{D1211} 1>2 WOT Pattern A Shift (b) 5000.000000 RPM
{D1220} 1>2 WOT Pattern B Shift (a) 5600.000000 RPM
{D1221} 1>2 WOT Pattern B Shift (b) 5600.000000 RPM
{D1230} 1>2 WOT TUTD Shift (a) 5600.000000 RPM
{D1231} 1>2 WOT TUTD Shift (b) 5600.000000 RPM
{D1202} 2>3 WOT Shift (a) 5600.000000 RPM
{D1203} 2>3 WOT Shift (b) 5600.000000 RPM
{D1212} 2>3 WOT Pattern A Shift (a) 5000.000000 RPM
{D1213} 2>3 WOT Pattern A Shift (b) 5000.000000 RPM
{D1222} 2>3 WOT Pattern B Shift (a) 5600.000000 RPM
{D1223} 2>3 WOT Pattern B Shift (b) 5600.000000 RPM
{D1232} 2>3 WOT TUTD Shift (a) 5200.000000 RPM
{D1233} 2>3 WOT TUTD Shift (b) 5200.000000 RPM
{D1204} 3>4 WOT Shift (a) 5400.000000 RPM
{D1205} 3>4 WOT Shift (b) 5400.000000 RPM
{D1214} 3>4 WOT Pattern A Shift (a) 5000.000000 RPM
{D1215} 3>4 WOT Pattern A Shift (b) 5000.000000 RPM
{D1224} 3>4 WOT Pattern B Shift (a) 5400.000000 RPM
{D1225} 3>4 WOT Pattern B Shift (b) 5400.000000 RPM
{D1234} 3>4 WOT TUTD Shift (a) 5200.000000 RPM
{D1235} 3>4 WOT TUTD Shift (b) 5200.000000 RPM
{D1206} 4>5 WOT Shift (a) 5200.000000 RPM
{D1207} 4>5 WOT Shift (b) 5200.000000 RPM
{D1216} 4>5 WOT Pattern A Shift (a) 5000.000000 RPM
{D1217} 4>5 WOT Pattern A Shift (b) 5000.000000 RPM
{D1226} 4>5 WOT Pattern B Shift (a) 5200.000000 RPM
{D1227} 4>5 WOT Pattern B Shift (b) 5200.000000 RPM
{D1236} 4>5 WOT TUTD Shift (a) 5200.000000 RPM
{D1237} 4>5 WOT TUTD Shift (b) 5200.000000 RPM
{D1208} 5>6 WOT Shift (a) 8191.875000 RPM
{D1209} 5>6 WOT Shift (b) 8191.875000 RPM
{D1218} 5>6 WOT Pattern A Shift (a) 5000.000000 RPM
{D1219} 5>6 WOT Pattern A Shift (b) 5000.000000 RPM
{D1228} 5>6 WOT Pattern B Shift (a) 8191.875000 RPM
{D1229} 5>6 WOT Pattern B Shift (b) 8191.875000 RPM
{D1238} 5>6 WOT TUTD Shift (a) 4000.000000 RPM
{D1239} 5>6 WOT TUTD Shift (b) 4000.000000 RPM

[MSURacing]

Pretty simple if you ask me. You have to upload the trans separately from the engine controller.

[ScarabEpic22]

Brian, as I said in your other thread, have you read and looked in the TCM? You HAVE to read the TCM out in order to adjust ANY trans parameter, the ECM contains 0 trans information.

Thanks MSURacing for the table #s! :good:

[55chevdelray]

Pretty simple if you ask me. You have to upload the trans separately from the engine controller.

Do you know what the Pattern A and Pattern B are? Is that table a stock Value? I don't think it is that simple. I can't even get into the TCM with this software, something wrong with the cable interface and software version. That table shows a "Hot Shift" and I'm wondering what that is, it shows a hot shift 5>6 at 317mph. Maybe you could explain it and if I can get into the table, I could make the changes.

[Wheelz]

Do you know what the Pattern A and Pattern B are? Is that table a stock Value? I don't think it is that simple. I can't even get into the TCM with this software, something wrong with the cable interface and software version. That table shows a "Hot Shift" and I'm wondering what that is, it shows a hot shift 5>6 at 317mph. Maybe you could explain it and if I can get into the table, I could make the changes.

Pattern A is typically daily driving, pattern B is tow/haul (or sport mode in cars) hot mode is if the trans is detected to be in an overheated state, kinda like a protection mode. Setting it to 317 is GMs way of saying if its overheating you won't be able to use 6th. One of the patterns will be cruise control, but I'm not at my laptop to look up which one that is.

Be patient. It's really pretty simple once you wrap your head around what is supposed to happen. Until then, yes, it's hard to see the forest for the trees. Just be patient and take lots of time studying the tables to make sure you understand what each does.

Have you read out the T43 tune yet? You must connect to the T43 controller and read it out separate from the E38. Are you trying to read with your V2 connected to your computer or are you just connecting the V2 only to the vehicle? That method is called BlackBox operation and you must make sure you have loaded the T43 module into the V2 from your computer first, otherwise you will never be able to connect to it. You can change those settings under the BBX tab of the V8 scan and tune software.

First tho, make sure your firmware is up to date, and your software too. Connect your V2 and check for updates in the scan and tune V8 software.

Also, whoever you purchased your V2 from is supposed to provide you with adequate instructions or explanation of how to get started. If not we are more than glad to help you out

[joecar]

Post your TCM file.

Also, which V7/V8 build version are you using...? Which V2 firmware version...?

[55chevdelray]

Pattern A is typically daily driving, pattern B is tow/haul (or sport mode in cars) hot mode is if the trans is detected to be in an overheated state, kinda like a protection mode. Setting it to 317 is GMs way of saying if its overheating you won't be able to use 6th. One of the patterns will be cruise control, but I'm not at my laptop to look up which one that is.

Be patient. It's really pretty simple once you wrap your head around what is supposed to happen. Until then, yes, it's hard to see the forest for the trees. Just be patient and take lots of time studying the tables to make sure you understand what each does.

Have you read out the T43 tune yet? You must connect to the T43 controller and read it out separate from the E38. Are you trying to read with your V2 connected to your computer or are you just connecting the V2 only to the vehicle? That method is called BlackBox operation and you must make sure you have loaded the T43 module into the V2 from your computer first, otherwise you will never be able to connect to it. You can change those settings under the BBX tab of the V8 scan and tune software.

First tho, make sure your firmware is up to date, and your software too. Connect your V2 and check for updates in the scan and tune V8 software.

Also, whoever you purchased your V2 from is supposed to provide you with adequate instructions or explanation of how to get started. If not we are more than glad to help you out

Thanks. Thanks for the encouragement. I was able to download both controller files (E38 & T43) and saved them to my computer. I wasn't sure about what version I should be using. I downloaded the V7.5 and the current updates and also downloaded the V8 with current firmware updates as well. I had some initial problems opening the E38 but found the ZIP file, to address that problem. I'll need to determine the best shift points to set into my trans controller. I haven't found any spreadsheets that help to determine optimum shift points. Any knowledge of where I might find one. I found one yesterday, but it was in metric and I'd like one in MPH. Thanks again, it is a bit of the forest before the trees for me right now. :)

[55chevdelray]

Post your TCM file.

Also, which V7/V8 build version are you using...? Which V2 firmware version...?

How do I post the file?

[55chevdelray]

Post your TCM file.

Also, which V7/V8 build version are you using...? Which V2 firmware version...?

{D1200} 1>2 WOT Shift (a)
{D1201} 1>2 WOT Shift (b)
{D1210} 1>2 WOT Pattern A Shift (a)
{D1211} 1>2 WOT Pattern A Shift (b)
{D1220} 1>2 WOT Pattern B Shift (a)
{D1221} 1>2 WOT Pattern B Shift (b)
{D1230} 1>2 WOT TUTD Shift (a)
{D1231} 1>2 WOT TUTD Shift (b)
{D1202} 2>3 WOT Shift (a)
{D1203} 2>3 WOT Shift (b)
{D1212} 2>3 WOT Pattern A Shift (a)
{D1213} 2>3 WOT Pattern A Shift (b)
{D1222} 2>3 WOT Pattern B Shift (a)
{D1223} 2>3 WOT Pattern B Shift (b)
{D1232} 2>3 WOT TUTD Shift (a)
{D1233} 2>3 WOT TUTD Shift (b)
{D1204} 3>4 WOT Shift (a)
{D1205} 3>4 WOT Shift (b)
{D1214} 3>4 WOT Pattern A Shift (a)
{D1215} 3>4 WOT Pattern A Shift (b)
{D1224} 3>4 WOT Pattern B Shift (a)
{D1225} 3>4 WOT Pattern B Shift (b)
{D1234} 3>4 WOT TUTD Shift (a)
{D1235} 3>4 WOT TUTD Shift (b)
{D1206} 4>5 WOT Shift (a)
{D1207} 4>5 WOT Shift (b)
{D1216} 4>5 WOT Pattern A Shift (a)
{D1217} 4>5 WOT Pattern A Shift (b)
{D1226} 4>5 WOT Pattern B Shift (a)
{D1227} 4>5 WOT Pattern B Shift (b)
{D1236} 4>5 WOT TUTD Shift (a)
{D1237} 4>5 WOT TUTD Shift (b)
{D1208} 5>6 WOT Shift (a)
{D1209} 5>6 WOT Shift (b)
{D1218} 5>6 WOT Pattern A Shift (a)
{D1219} 5>6 WOT Pattern A Shift (b)
{D1228} 5>6 WOT Pattern B Shift (a)
{D1229} 5>6 WOT Pattern B Shift (b)
{D1238} 5>6 WOT TUTD Shift (a)
{D1239} 5>6 WOT TUTD Shift (b)

LABELS 1>2 WOT Shift (b)
Parameters Value
{D1200} 1>2 WOT Shift (a) 5600.000000 RPM
{D1201} 1>2 WOT Shift (b) 5600.000000 RPM
{D1210} 1>2 WOT Pattern A Shift (a) 5000.000000 RPM
{D1211} 1>2 WOT Pattern A Shift (b) 5000.000000 RPM
{D1220} 1>2 WOT Pattern B Shift (a) 5600.000000 RPM
{D1221} 1>2 WOT Pattern B Shift (b) 5600.000000 RPM
{D1230} 1>2 WOT TUTD Shift (a) 5600.000000 RPM
{D1231} 1>2 WOT TUTD Shift (b) 5600.000000 RPM
{D1202} 2>3 WOT Shift (a) 5600.000000 RPM
{D1203} 2>3 WOT Shift (b) 5600.000000 RPM
{D1212} 2>3 WOT Pattern A Shift (a) 5000.000000 RPM
{D1213} 2>3 WOT Pattern A Shift (b) 5000.000000 RPM
{D1222} 2>3 WOT Pattern B Shift (a) 5600.000000 RPM
{D1223} 2>3 WOT Pattern B Shift (b) 5600.000000 RPM
{D1232} 2>3 WOT TUTD Shift (a) 5200.000000 RPM
{D1233} 2>3 WOT TUTD Shift (b) 5200.000000 RPM
{D1204} 3>4 WOT Shift (a) 5400.000000 RPM
{D1205} 3>4 WOT Shift (b) 5400.000000 RPM
{D1214} 3>4 WOT Pattern A Shift (a) 5000.000000 RPM
{D1215} 3>4 WOT Pattern A Shift (b) 5000.000000 RPM
{D1224} 3>4 WOT Pattern B Shift (a) 5400.000000 RPM
{D1225} 3>4 WOT Pattern B Shift (b) 5400.000000 RPM
{D1234} 3>4 WOT TUTD Shift (a) 5200.000000 RPM
{D1235} 3>4 WOT TUTD Shift (b) 5200.000000 RPM
{D1206} 4>5 WOT Shift (a) 5200.000000 RPM
{D1207} 4>5 WOT Shift (b) 5200.000000 RPM
{D1216} 4>5 WOT Pattern A Shift (a) 5000.000000 RPM
{D1217} 4>5 WOT Pattern A Shift (b) 5000.000000 RPM
{D1226} 4>5 WOT Pattern B Shift (a) 5200.000000 RPM
{D1227} 4>5 WOT Pattern B Shift (b) 5200.000000 RPM
{D1236} 4>5 WOT TUTD Shift (a) 5200.000000 RPM
{D1237} 4>5 WOT TUTD Shift (b) 5200.000000 RPM
{D1208} 5>6 WOT Shift (a) 8191.875000 RPM
{D1209} 5>6 WOT Shift (b) 8191.875000 RPM
{D1218} 5>6 WOT Pattern A Shift (a) 5000.000000 RPM
{D1219} 5>6 WOT Pattern A Shift (b) 5000.000000 RPM
{D1228} 5>6 WOT Pattern B Shift (a) 8191.875000 RPM
{D1229} 5>6 WOT Pattern B Shift (b) 8191.875000 RPM
{D1238} 5>6 WOT TUTD Shift (a) 4000.000000 RPM
{D1239} 5>6 WOT TUTD Shift (b) 4000.000000 RPM

Version 7.5.7 Build 230
Version 8.2.2 Build 224

[Wheelz]

Thanks. Thanks for the encouragement. I was able to download both controller files (E38 & T43) and saved them to my computer. I wasn't sure about what version I should be using. I downloaded the V7.5 and the current updates and also downloaded the V8 with current firmware updates as well. I had some initial problems opening the E38 but found the ZIP file, to address that problem. I'll need to determine the best shift points to set into my trans controller. I haven't found any spreadsheets that help to determine optimum shift points. Any knowledge of where I might find one. I found one yesterday, but it was in metric and I'd like one in MPH. Thanks again, it is a bit of the forest before the trees for me right now. :)

Please read the entire post before attempting any changes. I am assuming your truck is in sound mechanical condition and that you are using a good bit of common sense when testing so you don't tear your truck up if you made a mistake. This is a guide that I follow for my trucks, make changes at YOUR OWN RISK. If you are not comfortable tuning your transmission consider buying a tune from a tuner.

Happy reading


What I've been doing on my personal truck (ls1B = 05 5.3 and 4L65, so it's gonna be a little different cause I only have 4 gears to work with, but not too different)

1. Correct you speedo for any tire change. Verify the speedo output from the ECM matches the TCM speedo output matches your speedometer. You'll have to make a couple datalogs to verify this. If you need help with that let us know.

(The following is for up shifts)
2. Set your WOT shift points and copy those values to your part throttle shift tables for throttle positions 65% and up

3. Determine what speeds you want your truck to shift at when your driving easy (less than 30% throttle position) I tuned my moms 6L80 to always keep the rpms above 1500 after the shift. Just drive it in manual mode and take notes at what speeds you want it to shift at.

4. Go to your part throttle tables and at approx 15% throttle, set the values to the what you liked from step 3. Then for 0% throttle, subtract 2-3 mph from that value and for ~30% throttle add 2-3 mph to that value. Highlight the cells from 0-30% inclusive and select the linear smooth button from the toolbar. You should see the graph become a nice smooth line. Or you can do that manually by picking numbers.

5. Highlight starting with the 30% throttle cell you changed to the 65% throttle cell you changed and click the linear smooth button again to make a nice straight line. You can massage the corners (no more than 2 points) so you have nice smooth transitions in the graph.

6. Determine what gears you want the torque converter to lockup in. I did gears 4-6 in my moms and 2-4 in mine. Locate the TCC folder and find the TCC apply speeds. For 4th gear TCC apply speeds, copy the entire 3->4 part throttle shift table to the 4th gear TCC apply speed table and then multiply every value by 1.05. That will let the truck shift then lockup the converter. Some people prefer to simply add 2mph instead of multiply by 1.05. It's all personal preference of how quick you want it to lockup. Then repeat that process for the other gears. 4->5 copies to 5th gear apply speeds. 5->6 to 6th gear apply speeds, and so on.

7. (Downshifts) for simplicity sake, start with WOT. Determine what speeds to downshift at. ***make sure your downshift speed is LOWER than your up shift speed, or you can create the shuttle shift where your truck can't decide what gear to be in*** one guide is for the (example) 3->4 WOT up shift, subtract 5mph and that is you 4->3 downshift speed. Set all your WOT downshift speeds similar to that process.

8. Copy the WOT downshift speed to the appropriate part throttle downshift table at throttle positions greater than 85-90%.

9. This is where it can get confusing... For the 4->3 downshift, go to the 3->4 up shift tables and highlight the cells that have speeds LOWER than your WOT downshift speed for the 4->3 shift. Copy those cells from the 3->4 table to the 4->3 downshift table so that the last cell you highlighted lands at the 85-90% throttle position. This means that there will be cells at the top of that table that are unchanged.

10. For the cells that were left unchanged after that last copy event, copy the 0% throttle position up shift speed and subtract ~3-5 mph and set that as your 0% downshift speed. Highlight from 0% to the "corner" on the graph where you shift points start climbing rapidly and click the linear smooth button. That will give you a good starting point for your downshift tables. You can massage the values where you want it to shift sooner or lug harder.

11. TCC release speeds. (Torque converter unlock) for (example) 4th gear release speeds, copy the entire 4->3 part throttle downshift table to the 4th gear release speeds and either multiply all values by 1.05 or add 2mph. Do this for your other gears. (5->4 downshift to 5th gear release and so on) This will let the converter unlock right before the shift for smoother downshifts.

That's the basic process I follow. For your 6th gear downshift since that's your highway gear you will most likely have to adjust the values so that it will lug more and not shift so quick on a hill. I set my 75% throttle downshift speed to 75mph and smooth the graph from there. That's by no means a final shift table, but it will get you close enough you can simply tweak values and get there.

Use caution, go slow. It takes me an hour to rebuild all my tables for my 4L65. Take notes of what tables you've changed, are changing, and have left to change cause its easy to get lost and copy to the wrong one or miss one.

[55chevdelray]

Please read the entire post before attempting any changes. I am assuming your truck is in sound mechanical condition and that you are using a good bit of common sense when testing so you don't tear your truck up if you made a mistake. This is a guide that I follow for my trucks, make changes at YOUR OWN RISK. If you are not comfortable tuning your transmission consider buying a tune from a tuner.

Happy reading


What I've been doing on my personal truck (ls1B = 05 5.3 and 4L65, so it's gonna be a little different cause I only have 4 gears to work with, but not too different)

1. Correct you speedo for any tire change. Verify the speedo output from the ECM matches the TCM speedo output matches your speedometer. You'll have to make a couple datalogs to verify this. If you need help with that let us know.

(The following is for up shifts)
2. Set your WOT shift points and copy those values to your part throttle shift tables for throttle positions 65% and up

3. Determine what speeds you want your truck to shift at when your driving easy (less than 30% throttle position) I tuned my moms 6L80 to always keep the rpms above 1500 after the shift. Just drive it in manual mode and take notes at what speeds you want it to shift at.

4. Go to your part throttle tables and at approx 15% throttle, set the values to the what you liked from step 3. Then for 0% throttle, subtract 2-3 mph from that value and for ~30% throttle add 2-3 mph to that value. Highlight the cells from 0-30% inclusive and select the linear smooth button from the toolbar. You should see the graph become a nice smooth line. Or you can do that manually by picking numbers.

5. Highlight starting with the 30% throttle cell you changed to the 65% throttle cell you changed and click the linear smooth button again to make a nice straight line. You can massage the corners (no more than 2 points) so you have nice smooth transitions in the graph.

6. Determine what gears you want the torque converter to lockup in. I did gears 4-6 in my moms and 2-4 in mine. Locate the TCC folder and find the TCC apply speeds. For 4th gear TCC apply speeds, copy the entire 3->4 part throttle shift table to the 4th gear TCC apply speed table and then multiply every value by 1.05. That will let the truck shift then lockup the converter. Some people prefer to simply add 2mph instead of multiply by 1.05. It's all personal preference of how quick you want it to lockup. Then repeat that process for the other gears. 4->5 copies to 5th gear apply speeds. 5->6 to 6th gear apply speeds, and so on.

7. (Downshifts) for simplicity sake, start with WOT. Determine what speeds to downshift at. ***make sure your downshift speed is LOWER than your up shift speed, or you can create the shuttle shift where your truck can't decide what gear to be in*** one guide is for the (example) 3->4 WOT up shift, subtract 5mph and that is you 4->3 downshift speed. Set all your WOT downshift speeds similar to that process.

8. Copy the WOT downshift speed to the appropriate part throttle downshift table at throttle positions greater than 85-90%.

9. This is where it can get confusing... For the 4->3 downshift, go to the 3->4 up shift tables and highlight the cells that have speeds LOWER than your WOT downshift speed for the 4->3 shift. Copy those cells from the 3->4 table to the 4->3 downshift table so that the last cell you highlighted lands at the 85-90% throttle position. This means that there will be cells at the top of that table that are unchanged.

10. For the cells that were left unchanged after that last copy event, copy the 0% throttle position up shift speed and subtract ~3-5 mph and set that as your 0% downshift speed. Highlight from 0% to the "corner" on the graph where you shift points start climbing rapidly and click the linear smooth button. That will give you a good starting point for your downshift tables. You can massage the values where you want it to shift sooner or lug harder.

11. TCC release speeds. (Torque converter unlock) for (example) 4th gear release speeds, copy the entire 4->3 part throttle downshift table to the 4th gear release speeds and either multiply all values by 1.05 or add 2mph. Do this for your other gears. (5->4 downshift to 5th gear release and so on) This will let the converter unlock right before the shift for smoother downshifts.

That's the basic process I follow. For your 6th gear downshift since that's your highway gear you will most likely have to adjust the values so that it will lug more and not shift so quick on a hill. I set my 75% throttle downshift speed to 75mph and smooth the graph from there. That's by no means a final shift table, but it will get you close enough you can simply tweak values and get there.

Use caution, go slow. It takes me an hour to rebuild all my tables for my 4L65. Take notes of what tables you've changed, are changing, and have left to change cause its easy to get lost and copy to the wrong one or miss one.

Thanks, I'll give it a go, and get back if I have questions. The tranny has only 2000 miles on it and came out of a 3/4 ton pickup. I put it into my 55 Chevrolet.

[Wheelz]

No prob. Ill post up a tune so you can see what I'm trying to say, when I stop for the night.

[joecar]

How do I post the file?Start typing a response then click Go Advanced, then click Manage Attachments.

[Wheelz]

Sorry it took so long. here is my latest tune of my 4L65. But you can see what my shift curves look like

15104

[55chevdelray]

Finally getting somewhat comfortable with tuning. Made some changes to my TCM shift points. Seems the T43 reacts to speed rather than rpm for shift points.

[sb1111]

Hi I have a question how can you tell if engine and transmission are working correctly together?

[sb1111]

Hi I am looking for help someone who knows transmission 6 L90 and e38 controller and see tables to make sure they are correct in working together. Can you help.
I have one file that is good and one that is not and want to transfer.
The one that is not shifting right is when it's uphill with Ac on and heavy load. I am in California.

[55chevdelray]

Hi I am looking for help someone who knows transmission 6 L90 and e38 controller and see tables to make sure they are correct in working together. Can you help.
I have one file that is good and one that is not and want to transfer.
The one that is not shifting right is when it's uphill with Ac on and heavy load. I am in California.

Did you ever get this figured out?

[joecar]

Hi I am looking for help someone who knows transmission 6 L90 and e38 controller and see tables to make sure they are correct in working together. Can you help.
I have one file that is good and one that is not and want to transfer.
The one that is not shifting right is when it's uphill with Ac on and heavy load. I am in California.I somehow missed your post back in January...

Post both TCM files, and the ECM file.

[aaronr]

I found this information looking through this post "Pattern A is typically daily driving, pattern B is tow/haul" But I have three different part throttle tables. I have normal part throttle shift, Pattern A part throttle, and pattern B Part throttle.

Assuming 2013 GMC (6l80E)
normal part throttle = daily driving
Pattern A part throttle = tow/haul
Pattern B part throttle = cruise control

Please let know if above is right? I didn't see any notes in the EFlive tune file.

Thanks

[joecar]

You have to test it by editing a few curves in each mode and see which one shows up in a log.

[raceghost]

Hi, old thread, but need some help.

Couple questions if any one can help. THis in dealing with the 6L80E T43 mated to a 6.2L non VVT E38 in 2007 Escalade EXT.

First, once I adjust the shift points and pressures, do I need to run an adaptive relearn?

Do I need to adjust any settings in the Adaptive relearn process if I change pressures and shift points?

Any more clarification than is already offered in this thread by wheelz and/or joecar?

Thanks in advance,

[joecar]

If you change the shift points, you don't need to do the adaptive relearn.

Be careful in adjusting the shift pressures (!!!)... leave them alone.

[raceghost]

If you change the shift points, you don't need to do the adaptive relearn.

Be careful in adjusting the shift pressures (!!!)... leave them alone.

Thanks buddy.

To all, here is my first attempt a tuning my T43 6L80E. I have not tested this tune out yet, but am going to. I figured I would run it past the group, to look at and make suggestions as well as educate me if I made changes in areas that are definite no no's, or didnt make changes in areas that are needed. Again first attempt here, and I tried to apply everything I read. THis is only the TCM tune, I have not adjusted anything within the ECM file for this. Not sure if I am supposed to...?

I have read several threads on this forum, as well as the guys over at HP Tuners forums, as well as reaching out to a few tuners I know. So this Beta ROM Tune is a homioglation of all 3 methods.
Also, as a side note, Wheelz' post #11 in this thread is a very good write up and helped me out a ton. I am attaching a shift calculator that the boys over in HPT have made and is free to whomever wishes to download it. It is not my creation, but it is very closely a calculator that uses Wheelz method more or less. ALL Attachments are below.

This tune file includes all of these changes:

Tables Listed under "Shift Control:"
Shift speeds for (4) shift selections, Normal (Daily drive "D" Selection), Pattern A (Tow/Haul Trailer Button), Pattern B (Cruise Control Active) and Tap Up/Tap Down (Manual "M" Selection). ALL Hot and Hot shift tables were left alone. This requires correlating WOT tables to be adjusted as well. I also found errors in these tables and if you look at the stock rom you will find shift speeds in a few of the part throttle tables that make you go hmmmmm.

Tables Listed under "Torque Converter:"
Torque Converter Control for (4) shift, Normal (Daily drive "D" Selection), Pattern A (Tow/Haul Trailer Button), Pattern B (Cruise Control Active) and Tap Up/Tap Down (Manual "M" Selection). Also adjusted the correlating WOT control tables.

Tables Listed under "Shift Times:"
These tables were left mostly alone, a little smoothing here and there, but for most part completely stock. I believe I found a couple of errors in a few small tables that suggest to me some fat fingering on GMs part.

Tables listed under "Shift Pressures:"
As suggested these were primarily left alone. However, sub folder named "Engine RPM Pressure Line," 1st thru 4th table were adjusted. I watched several vids, and reached out to a few tuners who stated this is an ok practice. However, verdict is still out and all disclaimers apply.

Tables listed under "Torque Limits:"
Very minor adjustment to these tables over stock, just following again gathered suggestions from all known information I could find.

Table listed under "Adaptive Learning:"
Finally, I think I noticed an anomaly within the "Parameters" Table at the base level of this folder. If you look at the Stock Rom, Table D9264 is set to 40, when all other tables are set to 200. I have scoured looking for other stock roms, and why they are 1500 T43 6L80 Calibrations, this table in those roms is set to 200 stock, not 40... SO I think this is one of those Fat Finger issues with GM programmers. That table is the only change I made here.

Table Labeled "Speedo:"
I had already adjusted this table to reflect mirrored settings I have with the ECM tune. THis is set correct and I have posted about it over in another thread labeled for speedo calibration.

Also, here is the link to the HPT thread about the spreadsheet "Most GM Trans" Calculator: https://forum.hptuners.com/showthread.php?44953-Bluecat-Transmission-Table-Software This calculator does shift points for 4l60 thru 10L90 Transmissions. This is great find.

Again, thanks for looking at these, and I value everyone's input on this. Hope this helps the process, and thanks again.

[raceghost]

So I went out and preliminary results are good. Validated that Normal mode is shift lever D, Pattern A shift is Tow/Haul, and Pattern B is Cruise. All modes work well with my adjustments, however, I did notice a few adjustments that need fine tuning. I have made those adjustments within this new revision.

It is worthy to note that if anyone looks at this rom and decides to try it out, it is for an 07 Cadillac Escalade EXT E38 6.2L non VVT with T43 6L80E and this vehicle is AWD/4WD all the time. So variations may need to be done to the same era of GM 1500 variations.

Minor shift point changes
Torque Converter Lock up in Normal mode is 4th gear thru 6th gear
Torque Converter Lock up in Pattern A Tow Haul Mode is 3rd gear thru 5th Gear
Torque Converter Lock up in Pattern B Cruise Mode is 4th gear thru 6th gear.

All WOT tables have been adjusted to these settings as well.

Also remember it is speedo corrected for my tires.

Tap Up Down Manual Mode is also adjusted respectively in the shift points as well as the torque converter control.

And Line pressures have been adjusted as well. Shift pressures are stock, but some improvements in line pressure were done.

Still would love to have any feedback on the files in my previous post (post #25) and then you can compare them to this revision listed below.

Thanks again

[raceghost]

Oops, one more adjustments to Pattern A Tow Haul shift control, Pattern A Torque Converter Control. In the calculator you will see a table in the upper right hand corner labeled "D RPM" within the "Engine / Drivetrain" box. What this is, is a table that sets the highest downshift RPM you would like to see. This will help with downshifts in all shift patterns, but more importantly downshifts while towing. I have it set at the recommended 3500 RPM for downshifts while towing. Adjusting this RPM speed, will adjust the downshift points directly. So as I tested the Tow Haul pattern I set in previous tune revision, I found that it was downshifting correctly, but I was seeing 5K rpm on downshifts, under heavy load this could cause some issues. So this new attached tune has the pattern A Tow Haul mode downshift speeds readjusted for a 3500 RPM downshift.

Again, would love to have a second set of eyes check these out for reason listed in my previous 3 posts.

Thanks again,

[raceghost]

I have decided that I am jumping out side of the scope of this sticky. I have decided to merge the continuation of my Trans tuning in this thread, as well as my "T43: 2007 Escalade (2) Roms: 22" Rom and 18" Rom Calibration Speedo Adjustment" thread, all over to this thread > https://forum.efilive.com/showthread.php?29713-T43-2007-ERA-OS-24239353-CALID-24242131-or-24246751-Good-Performance-amp-Tow-Tune

Thanks again

[joecar]

I'm slowly reading thru your posts... please bear with me.