I don't crawl under the Dodge too much, I'll try to remember to look at which side the T-case is on.

Check and see if the NV-5600 can be adapted to the Duramax. It handles the Cummins 5.9 HO. I have heard they are expensive to repair.

Dana 80 is not indistructible. When I took mine in 'cause of a rumble on engine braking, the diff was bone dry and the bearings fried. My mechanic got it apart and found a spider had built a home in the vent tube on top of the dif. We theorize that the dif built up heat and blew out the front seal and dumped the fluid while I was on the road. I don't have any on the driveway. Luckily, he was able to salvage the ring and pinion gear ($$$) but it still soaked me to the tune of $700.

Over on 4bt.com, I have heard mention of adapting the electronic shift mechanism for the Allison but didn't pay attention. I'll bet somebody has done it.

Dave.

What's the last thing a red neck says, "Hey guys watch this."
What's the last thing a redneck hears, "Go ahead Bubba, you can do it."

Build plan: 65 Chevy one ton, 5.9L Cummins HO, NV5600 six speed, 2wd 1972-1987 IFS disk front, frame off restore/mod, custom dump/flat bed, Alcoa rims, Dana 70 3.73:1 duals drum rear, plush interior, Guards red with Marine Corps decals. Donor is retired 2002 Ram 2500, 194K miles.