Quote Originally Posted by Taily View Post
Actually, sorry to post again but (reading your original post again) my answer was correct for TH400 shafts that have a larger uni at one end and a smaller one at the other. Was that what you were referring to? If you're referring to a shaft that has a reduced diameter in it (with same size unis at each end) I have to say I don't know the answer to that one sorry.

Dave.
Dave, not totally correct. 308 TH400 shafts have 1.125" and 1" unis at opposite ends but 350 TH400 have 1.125" at both ends.