[rgunlock]

I "believe" that cutting the mainshaft down has to do with the coupler between the AA tailhousing and the NP205. Mine had to be cut down because I have the 23 spline NP205.

I just got off the phone with AA. Basically, they told me as long as the bellhousing bolted right up I do have the older NV4500 and if it has the newer style shift tower somebody replaced it. So, sounds like I won't have to pull it all back out of the truck due to a wrong bellhousing at least.