Quote:
Originally Posted by arpad_m
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.
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Well, I can't say I blame them honestly for waiting it out. Seems one of the main issues is slow clutch fill times attributed to the piston designs and calibration (both I'm guessing could be fixed/updated if needed). But I'm sure GM won't ever foot the bill for all that.
I would be interested in comparing my tcm calibration to another current version. Should be no harm in just downloading my tune to my laptop as far as warranty purposes go right?
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2001 Z28 Full bolt on’s, ported 243’s, small cam, FMVB TH400 w/3,800 hard hit stall, 3.42’s. *sold* 😔
2018 SS Camaro A8 1LE replica wheels, bone stock otherwise
2008 F150 Daily driver
2002 Heritage Softail Classic 1.5 inch lower progressive rear springs/monotube fronts, 13" apes, 21" front mammoth spoked wheel, SE 10.5 cr heads, SE 264 cams, Mikuni HSR 42 flatslide carb, V&H pipes
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