i'm pretty sure the gear ratio on the 92rs is 3.42, but i don't know the ring size.(i'd rather not take the cover off again and measure if someone knows) i /have a 7-5/8 3.73 ring and pinion with a GM posi carrier to put in. i'm not sure on the 2-3 series info. will this swap work? if they are the same size would the swap be as simple as retaining the same shims and slipping the new unit in?

thadd47

 

oh yeah, the 3.73 and carrier is a 10 bolt

thadd47

 

I have a 92 RS as well, and it has a 3.08 gear ratio, which I think is a 2-series carrier. If you have the new diff and gears you will be fine, since your new carrier is more than likely a 3-series which is required for the 3.73 gears. good luck

 

If the ring gear and carrier were already in a diff together before, and you're putting them both into your rear, it doesn't matter if they're 2- or 3-series, or what your current setup is (which is 3-series, if factory, by the way).

You should have it set up by someone who has the proper special tools and knows what they're doing.

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i talked to a guy at summit and he said that if you convert from a 2-series to a 3-series(or vice versa-can't recall) that you will need an adapter piece because one is longer(thicker) than the other. any more info?

thadd47