this is a 99 gtp L67 swapped into an 86 fiero gt.
tires are 245/40/18s
I have done the conversion from 225/60/16 in the speedometer tab.
anyway heres the strange issue.
in first, once the car gets up to about 37-38mph and 4600-4800rpms or so (i think my speedo is out)
its like the tranny disengages and the rpms take off under no load.
it will then bounce the limiter a few times, and then quite snappily grab second.
I have tried everything i can think of with torque management, changing mph shift points up and down, rpm shift points up and down, nothing seems to change this issue. always the same thing, at the same rpm.
Tranny fluid has been checked.
today I confirmed without doubt that its not clutches slipping, as i tested for a few hours straight, the shift to second is always fairly crisp, but
it seems to start to early, and take a long time to happen.
also never smells like burning clutch.
Any help would be greatly appreciated!