engine stalls after rebuilt tranny

After the engine was rebuilt for for main bearings, my son and I had issues with hooking up the transmission, only to find the tranny fluid pump wasn't enguaging, The fluid was dark, black, burned so I took the car in to have the tranny pump rebuilt and the whole transmission freshened with new bands and clutches.

After installation the engine runs but immediately stalls when going into reverse or forward from either park or neutral. The only way found to move it is rev it up and dump it into gear. Once moving it shudders to a halt when coming to a stop. It feels identical to having a manual transmission and forgetting to put in the clutch when coming to a stop.

I think the converter clutch is permanently locked up.

I've read elsewhere that the likelyood is either the harness is shorted and therefore is grounding the ECM signal, causing the solinoid to throw the "valve" to lock it up TCC slider valve has been put in backwards,

Or that the spring(s) are on the wrong end of the shaft, pushing it in wrong direction regardless of solinoid operation.

The shop denies any responsibility that it could be their fault that a tranny malfunctioning that was just rebuilt by them could be the problem. "Must be a driveability issue the way I programmed the ECM" after a fresh motor rebuild (for bearings) even though it was the same program running the motor as before the rebuild.

From our on sticky on the Topic:

14. TCC (Torque Converter Clutch) always locked: TCC apply solenoid circuit shorted to ground, TCC solenoid blockage, or TC broken (must remove trans and replace TC).


This of course presumes factory unit, not rebuilt, so add " TCC slider valve and/or springs assembled backwards" to the list if problem is after a rebuild

Your input on diagnosis of the problem is welcome.

Dave

Sounds like the shop needs to suffer some penalties. ;-)

Will "try " to have them remove and correct the TCC problem first. Otherwise taking them to court soon.

If you paid with a credit card, you can appeal to the credit card company. They usually reverse the charge until you are satisfied.

Unplug the harness,. if the problem persists,.it's internal,.

Thanks Nick. We unplugged the connector this afternoon. The car has been sitting from when it was brought home Saturday Morning.

The problem still persists. We drive took the vehicle back to the repair shoptonight, aso it will be there when they get there.

Fred, thanks for the idea of protesting the charge. I will do so.