From my own experience, my 2010 AR5 4WD has a 1 1/8" 26 spline input shaft. That is as common an input as you'll ever find on a GM. That 1 3/16" spline 'may' have come on a late Hummer H3 from what I have read. It's supposed to have improved internals like a revised syncro setup. Also my 2010 has a .590" dia pilot and takes the ACDelco CT1082 bearing....verified.

I'll have to find my way over to your Facebook group sometime soon. I read it often enough. Seen a guy looking for a bell housing, which I have a spare. Most wreckers don't separate the bell requiring you to buy the whole thing. Originally I was going to use the bell on the front of an AX15, but decided against it as the AX had water in side of it at some point. So I bought the lowest mileage AR I could get my hands on. As you see in the picture above, I grafted on the back half of the AX onto the AR to get the Jeep shift tower where I need it along with the Xfer case.

Talk to you later....maybe on Facebook.

Cornchip