Hi all!

I really hope anyone can help me.
I have a new 421 iron block stroker in my 99`C5 Corvette, A4.
Since the install, I did some tuning with LS1 edit to get the engine to run good.
I also did the scaling for my 3.42īs and the new tire hight (295īs in rear).

Now sometimes (pretty often) on the 2-3 shift at WOT the rpms go up to about 6000 then jump to 6500 (like itīs during the shift) and then it shifts like usually.
My rpm limiter is set to 6700 so it doesnīt hit the limiter.

If it doesnīt do that (no jumping rpms), it shifts at about 5800 rpm.

I have an FLP Level IV tranny and never had problems, not even on big shot Nitrous (thatīs why shiftpoints were set not above 6K rpm)!!

On my old tuning for my heads/cam setup the shifts were pretty perfect (although I havenīt done the scaling for the 3.42īs and 295 rear tires).
But now, with the new engine and the gear and tire scaling i started these 2-3 shift problems.

I cannot step back to the original tranny program, as I did so much other programming since then, that I donīt wanna reprogram, so I hope you can help me.



PLEASE help me ....I donīt wanna toast the tranny because of some wrong LS1 edit programming that I did .......

Or is it the tranny?? Just right after the engine install??
Hope not.....and I personally think itīs something on the tuning?!?!?!?!??

THANKS A LOT, Michael

BTW, I have a short 1 mb Video of three 2-3 WOT shifts.
If anyone wanna watch them , to help me, Iīll email them.
Thanks!!!