94 Camaro shifting problem

[Mark Romans]

94's had the 4L60E, if you have access to a tech2 you can manually command
the shift to change over-riding the ecm.  If you do that and it still
doesn't change it is a mechanical problem.  It is MANDATORY to buy shop
manuals and use the diagnostics if you are going to work on these things.
My 2c worth.  (Do it if your time is worth anything too).
Mark
-----Original Message-----
From: Jim Sloan <leroy at sunflower.com>
To: Owner-Gmecm <owner-gmecm at esl.eng.ohio-state.edu>
Date: Monday, November 01, 1999 8:26 PM
Subject: 94 Camaro shifting problem


>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.
>
>It seems to run very strong, otherwise.
>
>Can anyone offer some suggestions on this? Anything in the prom we may be
>overlooking?
>
>Thanks in advance.
>
>Jim Sloan
>leroy at sunflower.com
>
>