ok my 3.45 9-bolt rear has a tooth missing off the pinion gear , now i need to find a gear set for my rear , new or used, any info would be great, also i need to know if it is possible to put the 9-bolt rear disc brakes on a 10-bolt with drum brakes, because i have a spare 10-bolt rear with 3.73 in it, and if i have to i can put this rear in it, i will also consider trading this rear for the 9-bolt gears or something, any info would be great thanks to all who respond.

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87 IROC-z 305 TPI 5spd Borg warner 9-bolt 3.45 posi 4 wheel disc,8.8 Accel wires , bosch platinum +4 plugs,gutted air box K&N air filters,TB coolant bypass ,polyurethane tranny and torque arm mounts, K&N oil filter,Mobil 1 synthetic oil 10w30, futura GLS super sport tires 265/50/15 rear and 235/60/15 front mounted on 86 monte carlo SS rims ,

400 sbc and a 6 spd in the works

 

BTT