Driving about 40 mph and up the car will spuraticaly(sp?) feel like the converter unlocks and locks right back up. I guess it could also be the motor missing but i am doubting it is this. One thing that is odd is everytime it does the temp. gage goes cold and comes right back to where it was. Any ideas what could be casuing this?

 

Transmission/converter?

 

I had a low powered car that drove me nuts. Surged with the ac turning on and off.