Bench testing a converter...............

Checking for a friend who's trans area was making noise when in gear and when shut off like a fin or something came loose.............On the bench it spins easier one way more than the other and is a bit noisier than the known good one we compared it to............... Thankxxx..........

They clunck a little when you have them out and shake them when they are not pressurized with fluid. They only spin one way. Only noise I've ever heard from them in the car is if the bolts back out and hit the block. There's no service without cutting it open so if it's suspect send it out.

Sounds like it needs to be opened up for inspection. I think the diode is what makes it spin one way only if it has one.

the vert in one of my cars spin both ways and works fine.

Take your reaction shaft and input shaft and insert in to the converter. That pilots all the internals. Hold the reaction shaft and turn the input shaft both directions which turns the turbine. Then turn the input and support together. If no noise then the blades are likely ok.

The blade/s could still be bad because without the converter running you are not loading the blades with fluid flow.

The only way to test the stator overrunning clutch is to hold it while turning the input shaft both directions. One way will be easy and the other hard. EDIT - turn the reaction shaft - not input. Sorry.

The old converters had large slots you could insert a tool in to hold the stator - most all late models do not have those slots.

I believe the old service manuals showed how to make a tool using a dipstick that was bend.

Thankxxx guys will inspect more today............