Re: convertor stall problem
 

A sprag or roller clutch inside the converter is difficult to check for damage without disassembly. The inner and outer races will show skid marks, that may hold fine using hand power, but will slip or skid under engine torque. What type of transmission do you have. Some stator shafts are a seperate part that is press fit into the pump cover, but others like a 200 THM are a one piece part .

Re: convertor stall problem
 

No Allen i just tried to turn it by hand,and yes he said the convertor was apart and there was no problems with it.The trans is a 1:82 pro tree powerglide.

Re: convertor stall problem
 

A good converter builder will usually spot a bad sprag with the converter apart. Normally, if there is a sprag problem even suspected, they just replace the sprag since the converter is apart, because a sprag isn't as expensive as the labor to put it in.

It should not be a problem to just swap the pump out in a PowerGlide, you don't even have to pull the pan, you just have to check the end clearance. I've swapped them in the pits, with the transmission hanging from a vise by a big Phillips screw driver.

It is almost a certainty that either the sprag is bad or the stator shaft is slipping. However, ordinarily if the stator shaft slips very much, it will usually spin by hand.