PDA

View Full Version : PCM/TCM Updates



ThePend
09-05-2002, 13:13
Just got back from the dealer and had all the software updates installed including the shift busyness update.

Runs just fine, seems to have a little more pick-me-up, however I did notice that if you come to an abrupt stop, you can feel the Allison slam itself back into 1st. It never did this prior to the update. I'll continue to dive it around and let it learn again and see what happens.

3TV
09-05-2002, 20:09
Interesting point you bring up. I just had a bad TCM replaced under warranty on my '03 Duramax Chevy. Now the transmission slams itself back into first gear when I slow to a stop on mine as well.

3TV

MNBowTie
09-06-2002, 22:41
I had the TCM re-flash last week and mine has same effect with the abrupt first gear. However, towing is much better. Wish I had done it sooner.