onefast ls1

Last year before I broke my trans at the track I had my 275/17 wheels up front and 16 slicks in the rear. The car sat for some months after the trans broke. Now I rebuilt the trans and put my 315/17 back on in the rear those lights won’t go off and now I get abnormal shifts coming from the trans, sometimes when it downshifts it can be harsh and the 2-3 shift feels like the converter is locking and unlocking which I’m sure isn’t the case but what it feels like and my mph reading will fluctuate heavily when that happens. Also at 60mph I get a rocky ride

hokeplaya05

iTrader: (3)

what is the tire profile size? sounds like you have different height tires front and rear which will throw the system all out of wack and can cause those issues. i wouldn't drive it until you get this resolved

onefast ls1

275/40/17 front and 315/35/17 rear

hokeplaya05

iTrader: (3)

hmm both tires are 25.7" tall so that wouldn't cause the issue, how confident are you in the rebuilt trans?

onefast ls1

At this point I won’t say it can’t be the case but I am trying to check the box before pointing a finger at the builder