Originally Posted by horsehaulin
not sure what you mean by getting it right in the trans. having it rebuilt with a performance setup or by tuning. if by tuning than that is not right. very few people go in and touch the trans tuning. very few variables and a lot of money there. you can run a pretty good size tune on the tcm tune that is there. not the parts inside, but the tune will adapt to it.
The trans tune should match the engine tune in the Torque tables to a point. If you have a stock trans then you have no need to alter the TCM, but if you have upgraded the internals than working with the TCM tune can make the trans better. Some buy a ATS Co-pilot to get a race shift, but one could do the same with out the extra cost and it is true tuning, not fooling with false signals.
Tony
Mine2001 GMC 2500HD EC/LB, D/A. 4in MBRP exhaust, AFE Stage II w/Amsoil Ea air filter, ISSPRO boost/Pyro guages, PPE Boost Valve, EFI Live V2, Maximum OD Stage 2 Trans, Amsoil throughout, AirDog150, modded intake horn.
540HP/1056TQDyno'd Danville PerformanceApril 5th 2011
Hers: 2006 GMC Envoy XL Denali, Flowmaster 40 with a bullet style resonator in the back, EFI Live with the help of JoeCar and other great members here.
How would you adjust the torque table to match? The TCM tune has the table using RPM and TPS, but the ECM is using RPM and fuel (mm3).
I don't have those tables in my tcm. Mine is an 01.
I adjusted B0741
If the ECM is trying to limit engine torque then this table will define the commanded injection quantity value based on the torque value the ECM is trying to limit to.
This table is responsible for the 'de-fuel' effect during transmission shifts as the ECM attempts to limit engine torque as requested by the TCM.
I'm glad there is actually interest in this topic. There doesn't seem to be any info available and I like the discussion on it.
on mine (04 LLY OS), D5194 & D5195 are for the 8.1L gasser, I'm not sure how D5196 relates to the ECM tune since the TCM uses RPM & TP, wheras the ECM uses RPM and mm3, and D5197 will prevent the TCM from ever requesting defuel.Originally Posted by The Neens
What about D5194,5195,5196,5197 in the TCM?
Sparky, they should be in your tune if you're using a current relase. I just opened a few of the 01 TCM OS tunes that I have and they all had those tables. They're all under "Torque Control".
You're absolutely right, I read that incorrectly...
Dave, I remove/max out those tables in the TCM tune and control the defuel in the ECM tune...I've run it that way for several thousand miles with no known ill-effects...Seems to work with my truck...
Try at your own risk...
2007 CC/SB 4WD, McRat EFI Live, Trans, Trans Cooler and C3 clutch oiling mod by Mike L., SD Sleeves, SoCal Diesel
2002 CC/DRW 2WD, McRat EFI Live, Trans, Trans Cooler and C3 clutch oiling mod by Mike L., SoCal Diesel
I'm confused.... 5194 & 5195 don't apply to our trucks, so that leaves 5196 & 5197. If you Change 5197 to "Torque Limit Req Disable", the TCM won't even request defuel, so nothing in the ECM will even attempt defuel because the TCM didn't request it. That leaves 5196. I guess if you max that one out, it more or less won't defuel?
I was running with 5197 set to "Torque Limit Req Disable" and for the most part it shifted quite nice, but Mike L kinda worried me about a tie up.
I'm not too worried about clutch wear, as I think I could replace the clutches with what's in there without much trouble (I'd order replacement sets from Eric), but I AM worried about a tie up. Don't feel like picking pieces of my transmission up off the ground!
No I don't have any of those. What do you mean by latest release, latest efi or an updated tcm tune? This is the stock tcm tune out of my truck.
They're in your tune. What version are you running? I've got 7.5.4. I know D5197 came out some time after January. The others may have as well.
I have 7.5.3 I've been looking to see when .4 comes out but haven't seen it.
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