Ok, stickied.Quote:
Originally Posted by EagleMark
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Ok, stickied.Quote:
Originally Posted by EagleMark
Wow I just finished reading the whole thread, lots of great information!
Wow.... This was a ton of info to take in at one time. excellent info. I only piddle with EFI live on a very few customers of mine, but I have put a good bit of time into my personal truck. 09 Sierra LY2. I have adjusted TM and shift times awhile back and about two months ago installed 1-2 vette servo and 3-4 supper hold servo. Even with the TM adjustments the shift felt great. Not violent, but firm. I now have changed gear from 3.55 to 4.10 ( all this to compensate 35" tires ). Now the 1-2 shift is brutal!!!! I have returned TM back to oe settings, and it helped, but still to harsh. Any suggestions on next plan of attack? Main purpose of servos where to no smoke slush box 4l65E with the tires and now I'm afraid its going to grenade.
Anything above 18% TPS will "slam" on 1-2. Thank you in advance for any advise.
Wells
Set 1-2 shift pressure table back to stock, add more 1-2 torque reduction.
Updated ^Quote:
Originally Posted by joecar
Later years have table E1006.
Also, see this: When-throttle-kickdown-is-not-set-at-100
Quote:
Originally Posted by joecar
Also take note of this:
Same concept goes for the WOT MPH parameters.Quote:
Originally Posted by joecar
Joecar,
For the shift pressures is it safe to just copy the pressures from the performance side of D701, 702 and 703 to the normal side?
You can go a little higher...
I do this: make a straight line from (0, 0) to (399 ftlb, 96 psi)... do this on all 3 PT upshift pressure tables;
then set all 3 PT upshift time tables to 0.25 s;
then go for a drive, adjust shift feel by adding or removing TR from the shift torque reduction tables;
I also add 1 extra pint of ATF above the hot full mark (if you do this, check dipstick to make sure ATF is not frothing)... if you're drag racing this will help to keep filter submerged.
If decreasing TR does nothing to the up shifts, do I need to increase pressure?
How does it shift (soft, medium, firm, hard)...?Quote:
Originally Posted by zomeizter
Can you post your tune file...?
Shifts are soft, like the stock configuration, seems like the tune does exactly nothing when I flash. BTW, I used V7.5 when I flashed and I proceeded to adjust base pressure to a 10% increase, shift times set to 0.2500, and torque management reduced by 50% and later 70%. Every single time I tweaked the parameters and reflashed it seemed as if nothing changed. Maybe I need to tune with V8 instead of V7.5? I left my other laptop at work with all my tune files and can't post it at the moment, will do so as soon as I pick it up.
The Guinea pig is a 2005 Chevy Suburban, 5.3L 4L60E 4WD, completely stock...for now :D
V7 or V8 should not make any difference in editing.
There are other considerations:
to get a firm 1->2 shift you need the Corvette 2nd servo or the Sonnax 2nd Super Hold servo, and the wider 2nd band;
you have to make sure the 3-4 clutch is not slipping;
you have to make sure line pressure is good (the pressure regulator has not worn its bore);
do you have a stall converter...?
what state is the trans fluid (color/smell/level)...?
Do you do a cal-only flash or a full flash...?
Did it flash successfully...?
After flashing, if you read back the tune from the PCM, does it compare to what you flashed in...?
Excuse my lag, left the country briefly...
Tranny is full stock but maintained well, fluid is great, cherry red and smells like ATF, half a pint over filled. Cal-only flash was performed, cluster information center reads successful flash, have not verified by extracting afterward, will do very soon and report result. I was under the impression I could firm up the up shifts with Cal adjustment only but I guess I'm mistaken, if so I reckon I shall abandon further tweaking of this vehicle until hard parts go in the slush box...good day.
If tweaking the tables doesn't increase firmness, then you have to find out why.
If removing Torque Reduction does not increase shift feel, then try increasing Shift Pressure tables a further 25%.
Post your tune file, if you can, let's take a closer look.
will do, work intensity is finally decreasing, standby ma man...
No worries, take your time.
I'm back, work has given me a break for once...where were we? Oh yes, so I will post the tune file as soon as I figure out how, and, I have a question: You mention hard parts in the tranny for shift firmness, do you recommend the corvette servo installation in the slush box? I've been researching this and there's a whole lot of happy gearheads out there with the results of this "mod", I'm very interested.
Test 1...
The Corvette servo (or one with larger surface area, for example from Sonnax) is a must, there's no doubt about this (and it's an easy install).
Is this on an Auto cal unit??? Shows its lockedQuote:
Originally Posted by zomeizter
+1 it's locked/private...
tunetool says this when I try to open it:
Quote:
[Window Title]
Error
[Content]
EFILive cannot load the file: C:\Users\joecar\Downloads\05burbanStockCal_01_0000 .ctz
This file is flagged as private. The contents cannot be viewed using the EFILive V7 software, please use the EFILive V8 software instead.
[OK]
Umm, how do I unlock it for your viewing pleasure? I'm using a V2 BTW...
Just found this awesome post, as Joecar knows after my tune which involved setting shift points due to the 4:11 gears and mid mount torque arm. Spun out of the hole, hit second put car sideways mostly thru the gear hit third and bounced rev limiter telling me third didn't hold up lol I can drive it easy in third so in a month or so out comes trans time for rebuild and use a lot of this info !
During the rebuild there are various Sonnax upgrade parts that help to hold 3rd and 4th gears in high torque applications...
on ls1tech.com there are a few 4L60E build threads where they explain the Sonnax upgrade parts.
Hey Joe. The Corvette Servo is an EASY install. The SONNAX super servo is NOT simple. If not installed correctly, you will not have 4th.... or 4th will slip tearing up theQuote:
Originally Posted by joecar
trans. The clearance for the sonnax (combo of 2nd and 4th) 4th servo is .075 - .125 outside of that window it will either drag and burn the band or there will be no 4th.
We use a fixture we made and a dial indicator 90 deg to the cover and a "rocker lever" to apply the band from the cover manually for measuring.
Additionally, we always buy the sonnax extra long apply pin and grind it to fit. (takes many small grinding adjustments to get it right)
Go ahead.... Ask me how I know all this..... :( :Eyecrazy:
Chuck CoW
Hey Chuck,
Thanks for the info on the Sonnax super servo and band pin.
The fixture for measuring sounds like a good idea to make the job easier.
Not sure if this is right place to ask but did 0411 swap in my 96 it doesnt want to shift to 2nd in my driveway if i power brake in garage it shift at pretty high rpm. Looked at the upshift rpm parameters and they are all set at either 5000 or 4500 rpm the tune was a van tune i pulled off of here somewhere. Wondering if anyone knows what these values should be for the stock van tune for a decent starting point
Post your tune file, there might be other reasons for not shifting to 2nd.Quote:
Originally Posted by 96silveradoz71
Maybe I missed it but If VE tables being off can drop line pressure what about when you spray a dual nozzle methanol set up which changes VE? Does this require doing something different? I'm back to fighting a WOT 2-3 shift issue. Bounces the limiter around 8 times then shifts firm. Also could be trans going again.
Measure line pressure at the tap on the side of the case, see what it does during the shift.
Also log GM.TFMPRS, GM.GEAR and the other pids (VSS, RPM, ETC or ETCTP, MAP, MAF, ECT, TFT, TCCMODE) and post here.
Had to get new laptop, lost all my files and some reason couldn't get efi live to work but all good now I think.Quote:
Originally Posted by joecar
Just need to locate a pressure gauge.
If i had to guess its not commanding the shift all the time. went to the track and 1 pass shifted okay 10.89 @ 128 but 2nd pass wouldn't shift into 3rd and pulled 2nd all the way to redline 100 mph at the 1000ft and just bounced rev limiter. I lift and put in D and it shifts.
Post your tune file and some logs showing this.Quote:
Originally Posted by TLKSCHP
Well I planned on having a log to post today but i guess i still haven't figured out my software issue. Thought i got all the scanner 7.5 lined out and ready but all the pids, charts and themes are gone again. If i flash with V8 my dash wont work but is fine with 7.5 I noticed . starting to think i need to do a complete reflash i if can get this software working
No worries, take your time.
Use V7.5 to flash and log for this (for now).