L76 4l70e swap, need transfer case help
 

I'll be swapping a 2008 l76 and 4l70e into my grand wagoneer and need some help picking a transfer case. I want to go awd, from what I can find it appears a nvg-149 would bolt right up to the output shaft, I think it's a 27 spline on the transmisison and the 149 takes the same.

So I have a couple questions:

Am I correct and if so, what should I be looking for one to be pulled off, a 2003 Denali?

Is the 149 a good choice for the L76 vortec max with a black bear tune or are there other suggestions? I want to stay away from anything electronic that would require sensor readings.

With the 4l70e, is the speed reading wired to the transfer case or the transfer case? If the t/c, does the 149 have a speed output that will connect up with my harness?



I won't have the drivetrain for another 2 weeks so can't look to confirm and want to have everything on hand as early as possible. Any help is highly appreciated, I have been unable to get any locally. I realize there's likely more I am not considering, this is my first swap and really any major dealings with the transmission and transfer case workings.

Cheers
James

The 149 is far and away your best bet from a strength and simplicity standpoint if you are sold on AWD.

Depends on whether or not you're speaking Sierra or Yukon Denali when it comes to an '03 model, as starting that year the YD's switched to the BorgWarner units.

The NVG-149 was used in the following vehicles:
2001 Sierra C³
2002-2007 Classic Sierra Denali
2001-2002 Yukon Denali
2002 Cadillac Escalade
2003-2005 1/2 Chevy SS Silverado

Thanks for the help guys! I think I have it honed down to the vehicles to select from.

Do you happen to know, are the splines the same in each of these years (01-02 Gmc Denali SUV or a 01-06 Denali truck, 03-05 Silverado SS), so if my transmission is a 27 spline then I just need to grand any of those that I can get my hands on? Are there any you know for sure that are a 27 spline? I think I found that the SS's are, curious about the others.

So just a follow up, the 4l70e is indeed a 27 spline output, and a 2002 escalade 149 transfer case is a 27 spline input.