Wondering if anyone could help me out.
After deleting all the TM on an 04 GMC the 1-2 shift is slower than stock @ WOT, firmer but slower. It drags through the shift, then sorta bumps into second. The 2-3 and 3-4 shifts are dead on though. At part throttle the 1-2 shift is fine, this problem just exists from about 3/4 to WOT.
I've played around with the shift times, pressure and force motor current, but still no success. One thing that did seem to make a difference was lowering the 1-2 shift RPM down to 5000, but then it doesn't pull as good after the shift so I raised it back up.
If anyone could take a look at the tune or give me some more suggestions I'd really appreciate.
I've checked out this thread. It helped a little.
Thanks