91 z with about 8,000 miles on rebuilt tranny. 1st & 2nd gears are great and the torque converter is working great. (no slipping in the tranny at all) I drove it about 20 miles the other day and it was shifting great. I parked it for an hour and drove 3 miles home. It wont shift into 3rd now. i have checked that all the wires are connected and it has new fluid and filter about 2,000 miles ago. I am running an ALC and the tranny was built with racing clutches as well. It kinda feels like a valve body is stuck or something? Maybe the ecu or the ALC has gone bad? As a test, I have unhooked the tranny harness wich is supposed to lock it into final drive only and it just stays in 2nd. Anybody have this issue before?
Follow Ups
Automatic tranny stopped shifting into 3rd gear! - scottmt2100:15:37 01/17/13