Diff rebuild parts advice

[LSB4Me]

Well i think im going to go through Peaky Parts for 3.91 RP, Shims, Bearings for rebuild parts, and having a DIff shop rebuild the DIff with Wavetrac LSD.

As others have said, 3.91 over 3.85 for sure.

My car is street only with 3.91s. I don’t even notice a difference in freeway rpm vs stock and mpg is a silly thing to worry about on a performance vehicle, imo.

[bigjae46]

Their clutches simply do not last as long as OE-equivalent units. They are attractive due to their price but you get what you pay for. The bearings and items they do not make but supply are fine.

I disagree. I've pulled the racing diffs clutches out of my ZF LSD twice to inspect during gearing changes. They looked fine. Have had good results with the clutches in the V1 unit. The V2 unit is a different story. Not sure if it is a clutch disc issue or something else...0 for 3 with the V2.

I could see the clutches in the V1 and V2 units wear out quicker because of a stronger spring and the m-clunk fix. But if you put in OE parts they'd wear just as quick...if OE parts were available.

[1000hp]

Charging $1,400 for a ring and pinion set is criminal.