Aftermarket ring and pinions are ALL made from exactly the same stuff. Yet some rears shell teeth off like chiclets and some hardly ever break. What, you think 8.75 gears are made weaker than Danas, or that slight increase in ring gear size "fixes" the issue...........hell no. It's ALL about stuff moving that is not supposed to move. It's been pointed out several times, that 8.75s and Danas, as well as Fords have roughly the same diameter pinion shaft and there is little difference in ring gear diameters..............so, if you look at it from something resembling a rational thought process, that leaves only the CASE as the inherent problem. Most all cast rears have cast caps. Why don't the rest of them spit caps off?
only real difference is the heat treat of that same material, as for the 8.75 they are a good diff for their intended purpose, but I changed to a D-60 after grenadeing my 8.75 and never looked back.
