The UE's can be used too, (both the 6 and the 8 gear types) which is great, because they come with the pinion and the 4 bearings needed. and they have got tough cups!..You can't use savage diffs, the ringgear is too large.
I didn't think the ue diffs would work with the cups. I may be wrong. I was going to get them. Mike said the cups had to be changed out. Make sure with mike before hand. Serum may have tried this. Not trying to tell you different.
Peace!
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