Alright so in my 03 SSS, I've managed to get everything to swap from the 60 to the 80, except the adapter. I've already swapped input shafts on my transfer case, now I just gotta figure out what adapter it takes to mate them. Can anyone give me an idea on what exacly I've got to have? I would like a website or somethin to buy it from or a place to get one because this is the final piece of the puzzle. Thanks!

 

Get the trans to t case adapter from the dealer. Or try to find a used one. Just tell them you have a 2500HD 4x4 with a 6.0.

 

There is a member that sells them. A dealer item will not work, there isn't a factory adapter for the NVG149 tcase to 80e.

 

Does the nvg149 have the same pattern as the np241 and np208?

 

The info is in the thread below. I just can not remember where at..
AWD Conversion How-To

 

I didn't think there was a factory adapter, I heard it was a special made cast iron adapter of some kind. Any who hopefully the guy that contacted me can get me hooked up. I'm excited to try this 4l80 out, hopefully it holds up like everyone says they will.

 

It is factory on something. I think maybe something with a manual trans that is 4wd.
Some one on silverado ss will know the part number. Jon @ DBRods may still know the part number. He got it for me when I swapped.
or buy this one if it is still available.
Search Form - SilveradoSS.com

 

Zeake everything i read in there was just for a standard AWD conversion... nothing about a 4l80 tho..

 

Zeake that 2nd link of yours didn't work man.

 

You might have to be a member of silveradoss.com in order to see the for sale thread. I thought i updated the awd conversion thread to show 4l80. It was a rough time for me. Sorry.