Super Jet WTH!!! Drive Couplers Fitment Issues

[Parsonsjb88]

Ok so here's the issue. @BRANDO6X and I both have 701 engines for our SJ's, which we presumed the cranks were identical so we both ordered new billet couplers from epic. The issue is both sets fit on my crankshaft as well as his oem coupler. However neither billet coupler sets will fit on his crankshaft... I think were crazy or something. Can someoneplease chime in here.. are there different threads on crankshafts for the sj's? Only difference we can see is his crank is bored or hollow on the drive side and mine is solid but the threads look identical.

 

[Ducky]

The crankside coupler and the midshaft side coupler dont have the same threads...did you possibly try them backwards and not try the other way around?

 

[Parsonsjb88]

No we are aware of the difference between midshaft and crank threads. There's actually a physical difference between the crank threads