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 3.42´s and the new tire hight (295´s 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 it´s during the shift) and then it shifts like usually.
My rpm limiter is set to 6700 so it doesn´t hit the limiter.

If it doesn´t 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 (that´s why shiftpoints were set not above 6K rpm)!!

On my old tuning for my heads/cam setup the shifts were pretty perfect (although I haven´t done the scaling for the 3.42´s 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 don´t wanna reprogram, so I hope you can help me.



PLEASE help me ....I don´t 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 it´s 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, I´ll email them.
Thanks!!!