you are not supposed to twist the shaft. I have done it many times by accident and not noticed any damage, but I suppose there is the danger of damage....maybe you did.

I would suspect not getting everything tight enough first though.

Tom W

__________________
[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.