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Hi i have a crown gear part # out of a 1972 Charger 9 1/4 rear end. I would like to know what the gear ratio is part # 2852928-271 date coded 2-10-72. Normally in my expeience the ratio is part of the code number. Does anyone have a crown gear casting number decoder? Thanks Blair

Just looking for some advice on setting up an 8 3/4 rear end. I am replaceing the axle bearings and inner-outer seals in the housing. I also took the pot apart and exchange the spider gears with a posi unit. It is a 741 carrier 391gear had to change the yoke also to accomidate the 10 spline...

Hi just wondering if anyone can tell me if i need to use the mopar Posi track fluid & the treatement with the Borg Warner Spin resistant non clutch type posi. Considering they do not have clutches and are metal to metal.

Hi looking for some specks on how to rebuild a Borg Warner 8 3/4 spin restintant unit. I have read a couple articles that you can Machine the locking unit and get full factory results. Any help would be appreciated. Thanks Blair

Hi i have a number off the transmittion in my 67 Dart 383 BB and i am wondering if anyone can decode it so i know what production year it is. I want to replace the manual shift reverse acting valve body in the car. # on casing DH45H9D126926