Exactly. I test fit and checked everything when I first got it. Apparently I measured wrong. Just glad I caught it on my terms and not out in bfe.I guess the lesson learned from this one is always check input shaft clearance with plistigauge or silly puddy depending on the clearances expected...even if everything goes together smoothly without it. I bet that thing did not give any resistance until the last couple of threads. If resistance happens 1/2 or 3/4 way in then it is easy to tell something is not right, but if it the last couple of threads then it is impossible.