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4L60E no shift

I have a '96 K1500 with a 5.7L L31 and a 4L60E. Just finished putting in the motor after rebuilding it. While it was out I changed the filter and ATF and drained and refilled the torque converter. The transmission is now in some sort of limp mode. My understanding of a 4L60e is that "limp mode"...
- Mason Cramer
- Thread
- Jun 22, 2021
- Replies: 29
- Forum: Transmissions
M
Timing advance is extremely retarded on 96 5.7 vortec

I've got a '96 sierra with the 5.7 and it runs like crap. Idles alright but when I give it anything above around 1200 rpm it starts sputtering and misfiring. Exhaust backfires like a machine gun and it has a glass pack so i can hear it clearly. Good compression in cylinders, new wires and plugs...
- Mason Cramer
- Thread
- Jul 8, 2017
- Replies: 7
- Forum: Engine Performance + Maintenance