Quote:
Originally Posted by Kevin01Z28
Yep, glad I got the extended warranty. Is there a tcm recalibration that dealers can do to clean up the shift quality and other abnormalities in these 8 speeds?
|
I don't think so, at least my service manager and the senior tech who works on my car at the dealership have checked several times since late 2018, early 2019 and there have been no updates. They gave me a printout last time with the current versions, I can check the one for the current TCM calibration if you're interested.
Most likely no programmers at GM work on refining this transmission anymore, they seem to be running down the clock and hoping for a low warranty concern rate.
You will have better luck with an aftermarket tune once your extended warranty expires, my (impeccable) TCM tune is from Jannetty and I know there are several other reputable tuners as well who have the 8L90 figured out.
__________________
2018 Camaro 2SS — G7E MX0 NPP F55 IO6
735 rwhp | 665 rwtq
Magnuson TVS 2300 80mm pulley | Kooks 1 7/8" LT headers | JRE smooth idle terminator cam | LT4 FS & injectors | TSP forged pistons & rods
JMS PowerMAX | DSX flex fuel kit | Roto-Fab CAI | Soler 95mm LT5 TB | 1LE wheels | 1LE brakes | BMR rear cradle lockout | JRE custom tune
1100 - 1/30/18 | 2000 - 1/31/18
3000 - 2/06/18 TPW 2/26/18
3400 - 2/19/18 | 3800 - 2/26/18
4300 - 2/27/18 | 4B00 - 3/01/18
4200 - 3/05/18 | 4800 - 3/14/18
5000 - 3/16/18 | 6000 - 3/19/18