Someone posted on here about the UJ's not being set at 90degrees to each other. It might have been Heinz, but whoever it was had this tightening effect on lock.
They must be aligned properly or this can be the effect. A search might bring up the post. I don't have time now or I'd look. See below......first hit!
http://www.talkmorgan.com/ubbthreads.php/topics/616202/1
