Experince with B&M 50442 - B&M Tork Master Converter

Do you have a spare input shaft, or can you get one. If you can, stick it in the converter and twist the shaft. If the sprag is good, one direction will be easy, the other not so easy. If it's easy in both directions, the one way roller clutch may be defective.
The big problem is trying to GUESS what is wrong with a converter as they are a sealed unit. There have been some good ideas passed your way, but again, unless you cut the converter open you never really know what is going on inside.
I wish I could give you better information.