[1976gmc20]

Originally Posted by 57taskforce

Fortunately your 2500 if a 6.0 has the same old tried and true 10.5 14 bolt (note, not duramax or dually, those are an 11.5” and not the same) that we all love and regard so much, just with fancy rear disks, Dana 70 spec axle tubes, metric lug studs and spacing, and a slightly wider wms. Internally the newer 10.5” 14 bolts are 95% identical. Unfortunately it’s got the same old gov-bomb G80 that they have had for a long time, which aren’t really known for being really stout. Don’t abuse it too bad and you’ll likely never have an issue. My 18 Sierra 2500 company truck weighs north of 12K and is ALWAYS in the sand or the mud depending on the time of year. 82,000 miles later with slightly oversize BFG and Toyo mud tires and it still works perfect. It’s when you go into it full throttle and one tire grabs unexpectedly, or you hammer it with one tire spinning hard that the governor blows up like longhair mentioned. They are quite handy when they work right.

Thanks! I don't think I ever full throttle anything.