STALL UP

iTrader: (2)

I really need help here with my tranny tune it is not shifting into 3rd gear under WOT without letting off the gas a little. I have had servo's installed and it did not fix it. I have been told by a couple tranny shops that it sounds like a tuning problem so I set Shift RPM at 6200 speed at 67mph and rev limiter at 6900 still hits. I really dont know what else to change.If there is someone that would be willing to look at my HPTuner bin file and maybe help me out I would really appreciate it. thanks for you time Phill

81LS1Camaro

iTrader: (1)

I seem to have the same problem but mine bounces off the rev limiter in about every gear, I was told my problem was because my tune is for 3.73 rear gears and I have 3.08's. This throws off the computer making it think I am going slower than I really am, not letting the car shift. I wont know for sure if this is the case untill I get my gears installed this spring.

John_D.

iTrader: (2)

What table are you updating?

LC

i had the same problem time ago.. 3/4 clutch pack was gone...

BLUE99T/A

iTrader: (2)

Do you set the shifter to D or 3? Mine always hit the limiter in 3 but never in D. I don't know why, but it did.

STALL UP

iTrader: (2)

the WOT shift speed to 67 mph and WOt shift rpm 6200 rev limit to 6900

STALL UP

iTrader: (2)

It will do it if I manually shift, OD or D.

RevGTO

iTrader: (12)

Do a search on posts by cablebandit in the auto trans forum. He has had some good success fixing this with tuning parameters that are often neglected.

John_D.

iTrader: (2)

In hptuners there are:
Normal and Performance tables under WOT Shift Speed (mph)
and
Normal and Performance tables under WOT Shift RPM
I always update all 4 of these.

Also there is a box for WOT Shift Enable TPS %.
What value is in that box?
What TPS % is your pcm seeing when you are at wot?

For rev limiter, it's in 3 places on the same page:
- P/N rev limit (park/neutral)
- Bad vss limit
- Cutoff RPM Vs Gear
If you haven't gotten that last one taken care of, that could be part of the problem.

STALL UP

iTrader: (2)

here are what mine look like thanks for you help
Cutoff RPM Vs Gear was set at 6700
bad vss cutoff at 6699 on at 6700

wot shift enable tps %95 disable 90

John_D.

iTrader: (2)

Are you scanning the car when it does this? Do you know what the reported TPS% or reported RPMS were?

The tach on the dash is slow compared to actual rpms.

If the tps is only showing 94%, that would put you in a different place in the table.

If the tranny is slipping, from fluid starvation, that will let it bounce off the limiter too.
A deeper tranny pan is supposed to help alleviate that.

TopFlite

Yep just got my car back today from having the 3/4 clutch pack replaced. Turned out the selector in my A4 was going out causing the clutch packs to burn up and thus bouncing the limiter everytime from the 2-3 shift. Got a new valve body, and works thanks to GM warranty and it shifts like new on the 2-3 and even 3-4!