Thread: 1-2 Shift @ WOT

Ran the car at the track the other night and found that at WOT the 1-2 shift will not happen unless I let of the gas. Once I barely let of the gas it shifts and off I go again with no issue. I thought I was hitting the REV limiter but the more I thought about it I had the same issue last time I was at the track(pretty sure was same issue). The trans shifts great other than that and still pulls hard with no odd noises.

Since the last time I ran the car and now I have demodded and changed PCMs. I am pretty sure the issue I had the first time is the same as I had the other night but it has been over a year so not 100% sure.


The trans is an 02 with 3.29 single gears and a 3K stall....

Originally Posted by TheOtherNick

sounds like you need a shift kit.

I have ran this trans for 60K or so and never had this issue before....I wish I knew forsure if the problem I just had was the same before I demodded the car. That would narrow it down to maybe something in the PCM....maybe line pressures.....

Originally Posted by BillBoost37

Did it bounce off the limiter? Did you have KR? Which maf/TPS are you running?

I was not scanning so can not give any information on that....My thought was it was bouncing off the REV limiter as that is what is sounded like. Running a stock 98 TB........


I wanna say this issue is the same one that came up last time I went to the track and the car was modded....But hard to be 100% sure being it was 1.5 years ago. Then I was running an LS1 TB with SLP MAF and a differant tune in the PCM....If I knew forsure then it would help out the troubleshooting....

Do the trans tables in the PCM that you changed to have the same settings? Maybe it's tuned for a different final drive ratio

Originally Posted by OH4CompG

Do the trans tables in the PCM that you changed to have the same settings? Maybe it's tuned for a different final drive ratio

THis is what I am looking into now...Been talking with the guy that did my tune...