rhodescon

I've had my integra (91 rs) in the shop for a while now and had a new trans put in. That's when we found out the cylinoids were bad so we put new ones in. But now when we drive the car, after it heats up if you change gears to reverse or any of them, the engine revs and the tires sit still. Then if we turn the car off and let it sit, once we start it again it goes until it heats up again. My trans is an automatic. Anyone know what's going on. Any advice would be helpful. My buddy thinks it might be that one of the diodes in the ECU may be bad. Thanx