So you are on to a completely different topic than this thread was intended. Gotcha.

He already changed the input shaft. Now he needs the adapter that bolts to the t case and to the transmission.

 

OK here we go...

2003 Silverado SS AWD, Swapping to a 4l80e...

Input shaft on the transfer case has to be changed in order to cope for MORE splines on the 80e output shaft.. i've already done this

Now I need the adapter to bolt my tranfer case with the new input shaft onto the 4l80e, which has to have a different length adapter than the stock 4wd 4l80.. lol i wonder if this clears anything up.. still need some info..

 

HEY guess what I found. . . . . .part number is 15724745. For a 80E to AWD T-case..

 

that is going to work with my t-case?

 

If you are putting a 4l80 in a silverado ss that is awd I believe so. It is what I used when I put a 4l80 in my truck.

The thread That I got this information from is below.

wtb 4l80 transfer case adapter

 

GM Parts Direct: Your direct source for Genuine GM Parts 46.03$

 

well i own a parts store, i get a decent price on factory gm parts, $51.20 at my door in the morning.