WOT 2-3 Shift
03-14-2010, 10:25 AM
#1
WOT 2-3 Shift Hey guys I have a quick question. I just put a new rear end in my Trans Am (Moser 9" 4.11 gears), and without a retune it was having issues staying off the limiter between shifts. since then, I have bought hptuners and recalibrated it for the rearend gear change. it fixed the 1-2 shift but still has issues with the 2-3. normally i would say its a mechanical issue, but since it happened simultaniously with the gear change i feel its in the tune.
im still new to the hptuners business, and was wondering if someone could point me in the right direction as to what to check, or modify to get this thing running right!
im still new to the hptuners business, and was wondering if someone could point me in the right direction as to what to check, or modify to get this thing running right!
03-14-2010, 11:28 AM
#3
sorry about that...here you go:
tune that worked perfect with 3.23 rear:
mattstock.hpt
tune i edited for 4.11 rear: 1-2 shift fine, 2-3 limiter:
mattspeedfix.hpt
tune that worked perfect with 3.23 rear:
mattstock.hpt
tune i edited for 4.11 rear: 1-2 shift fine, 2-3 limiter:
mattspeedfix.hpt
03-14-2010, 12:43 PM
#4
I looked through the tune and didn't see anything out of wack. The 2-3 shift in the 4L60E is the worst one because there is a lot going on mechanically. The reason it is a problem now and not before is because the rpms are climbing a lot faster than before. You could try lowering the 2-3 shift rpm by 100 and see if that works. It will give the trans a bit more time to complete the shift before the limiter.
03-15-2010, 11:52 PM
#6
alright guys, didnt seem to help any
attached are my logs from a few runs. for some reason from a stop it will hit the limiter, but from a roll it shifts fine.
let me know what you think
attachments.zip
attached are my logs from a few runs. for some reason from a stop it will hit the limiter, but from a roll it shifts fine.
let me know what you think
attachments.zip