94 Camaro shifting problem

[David A. Cooley]

At 08:59 PM 11/1/99 -0600, you wrote:
>I have been helping a friend with a 94 Camaro Z28. It has a highly modded
>355 LT1 that is fed by an ATI procharger and N2O. It does not shift gears at
>WOT. He has used a Hypertech power programmer to adjust the shift
>points, but it doesn't seem to make a difference. It always goes to the rev
>limiter (wherever it is set).  On part throttle driving, the tranny shifts
>normally.  After talking to the guys at Hypertech, he sent the unit back to
>have a new chip installed.  That did not work either. Then he went to a
>custom tuner who uses MasterTune but could still not fix this problem.
>He recently had the transmission rebuilt.  It is a 4L60E with a TransGo
>shift kit, larger 2/4 band, mechanical diode, etc etc.  This problem
>occurred before the motor and the tranny were built also.  At the same
>time, he switched from a 2.73 to a 3.73 gear. They have not been able to get
>it to shift at WOT, either.
>TCC doesn't engage until around 80 mph even with the program set to lock up
>much earlier.


Sounds like the PCM doesn't know that the rear gears are now 3.73...  You 
need the right VSS gear, AND the PCM has to be programmed to know the gear 
ratio as well.

===========================================================
            David Cooley N5XMT           Internet: N5XMT at bellsouth.net
      Packet: N5XMT at KQ4LO.#INT.NC.USA.NA   T.A.P.R. Member #7068
    Sponges grow in the ocean... Wonder how deep it would be if they didn't?!
===========================================================