To change yours from a 3:73 to a 3:07 is more involved than just changing ring and pinion. The carrier that the ring gear bolts to has to be changed also. There is seris 3 carriers that fit gear ratios 3:50 and lower ie: 3:42, 3:07 and seris 4 carriers that fit 3:73 and higher ie: 4:11, 4:56. Good luck 70short/step
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