Automatic Transmission
 

Hey guys, so I have a 1986 Z31 Turbo automatic, and last night I was getting on the on ramp and had the car doing about 90 km/h. The car started shifting randomly then I had no guts. It was like I was in 4th gear all the time. If I pushed the pedal the engine would rev but I wouldn't go any faster. I had to idle it home. I checked the trans fluid and it seemed to be at the right level, it was on the H line and the car was hot after a long drive. I started it up this morning and it seemed fine. I can't drive it around the block until my dad gets home (have my L >_>) Has anyone ever had problems with this before?
I know the trans has been replaced once, but I don't know why it was.

Also, I've noticed that in drive it has almost two selectors. I'll try to get a video and upload it. From drive if I bump it forward a slight amount the car will gear up and drop RPM while driving. But from a stop it's gutless. Then putting it back into drive it has all the guts, but sits at high RPM while doing city speeds (3500)

Any help would be amazing.

The trans is going out and will be expensive to repair/rebuild $15-1800. Do a 5 speed swap, that's the only real solution the the Z31 auto trans problems

check the kickdown solenoid