I have an awd Silverado with a 4l80e and np149 and I’d like to find a transfer case that will use my existing rear driveshaft and allow proper 2wd for use on a dyno.
I have read about how to use the np149 on a dyno but I’m not interested in that method, I would prefer to swap to a 4x4 case.
Back when the truck was 4x4 i swapped from 60/4x4 to 80/awd in one go and used the stock driveshafts so I’m pretty sure the old transfer case wouldn’t work with the 80 and stock driveshaft.
If there is some site that lists dimensions of a bunch of cases that would be helpful too.
thanks

 

Any of the 32 spline cases will work

common numbers are 241, 243, 261, 263

anything from 99+ will have the proper generation VSS so the dash/trans control is happy

 

They are all the same length from mounting flange to output shaft?

 

They all share the rear housing, so yes they are the same length

the front housing can't be any smaller than it is because of the chain width

my 261 that I just finished is 20.750" from flange to end of rear seal- if you want to measure your 149 for reference

 

I swear I reused the stock driveshafts when swapping to 80e/149 which put in my head that the 149 is shorter than the stock case.
I have a spare and it’s 18” from flange to extent of seal.

 

It is a lil shorter. Perhaps enough so that you'll need to have a shorter rear shaft made