just a thought, but it makes me wonder if the mechanic that thinks he knows, & may have bought PHONY parts, all manufactures have had problems, with phony parts being sold with their labels. otherwise I cant imagine a problem.Could you ask the guy for an example? I'm curious what Andrews product wore out in 20K.
The last Andrews product I used was a mainshaft for a 61 CH 16 years ago and it was so nice I almost hated to put it in so I couldn't look at it. It's still going strong, not 200K strong like Shovit's trans, but a lot of miles.