So i know the 2500-3500 trucks with the big block 8100 have the allison trans but what do the Burbans come with? Remember GM says the reason we cant get a diesel burb is because there i no room for the allison.

THanks
Shawn

 

I'm positive it has an 80E in it.

 

ditto

 

why dont you just look under it?

 

80e.... please...

 

If it's relatively newer, you get the 85e, a slightly upgraded 80e, but both take more abuse than you can dish out stock. Else yea, it's the 80e.
Yea, to fit the allison, it'd need a 2" body spacer.

 

It is definately a 4L85-E. The two rear planetaries have 5 pinions in them.

The 2500 Avalanche has the same transmission.