[Thealien]

Yes both are aluminum. I think the reason you have to modify is there are many different aplications for the different parts. If you wanted to use their transfer case adapter with a stock bearing supported coupler (no VSS) the modification I made would make that unuseable! In the instructions it says if you have the bearing supported adapter you will need theirs (its about what the savings are if you buy the whole kit instead of idividual pieces like I did) But I can't see why you just couldn't cut the 1/2 inch off the transmission end of the coupler and use it without the bearing? Other than the bearing area the outside diameter of the two couplers are the same. My coupler had slight grooves where the seals rode so I needed one anyway.

I really want to try and sell my original adapter or I would modify it to see if I can make it work. I like to Know, have the answers but I do believe it wouldn't be too bad.