my friend larry owned a torque converter rebuilding shop---he said most of the catalog converters are loose (inefficient) and poorly done---at one time he was courting speedway to be their builder---they were waffling around on his prices--so larry ordered 3 converters from speedway which were drop shipped from their supplier (i think in georgia)----larrys family is from nebraska so he goes there alot--he took their product to their plant--opened the boxes and cut open their converters right in front of them---all 3 had surface rust on the inside possibly because they had been on the shelf so long and hadnt been properly oiled after welding----speedway still not liking larrys price just said we we will talk to the plant about that----and that was it----larry has since retired and sold off most his equipment...