Did a lot of searching and couldnt come up with any solid answers, I did the 80e swap in my 06 and got it going no prob but I have a gmt900 now and the auto track tcase seems to be the problem from what I read. Anyone have any input on this? Can I swap the input on the tcase and make it match up to the 80e? or will I have to convert the 80e to match the case? Or I also read that its 31 spline and no one has made it work. Any info would be great, I did all kinds of searching and couldnt come up with anything. I just know the 70e will be the weak link and like to get it out asap. Thanks in advance!!

 

Nothing? I figured this would be a pretty talked about subject.

 

I can't think of anyone that's done a 4L80 swap in a '07+ 4WD. I swapped my 70e out to the 6L80 and was able to use my stock transfer case!

 

How difficult was the swap? I've got a 2wd and thought about this swap ( 6l80)

 

Sub'd for an answer to this..

 

I've swap mine out to a 4L80. Phoenix Transmissions can make you a transmission with a custom output shaft to match your transfer case.
That's the only way I've heard of doing it with the NNBS transfer case.
I opted for the billet shaft and he warranties the transmission for 2yrs/24K no matter how much power you're putting to it!

 

hammer's swap thread has the part # for a transfercase input shaft that would most likely work.

 

That's hell of a deal! I'll give them a call then. Thanks man!