12 Bold Chevy & Dana 60 Rear

[V10nacuda]

Originally Posted by Mike Taylor 3601

The weak spot on 12 bolt or dana 60 is pinion not having support at rear of pinion like 9'' does. What happens is pinion head will bend and develop run out,tight one side turn pinion half turn will be loose(backlash) You can put any housing,rear cover etc.you want but it will not stop pinion from bending.
I ran 2900 lbs 5 spd car @6 teens 1/8 w/1.26 60' about 35 runs was life of gears and that was with soft properly setup clutch wrong clutch cut that life in half. It was 12 Blt. all mark williams parts billet caps and all.
Mike Taylor 3601

Interesting....I.m guessing that was with a PRO gear????? WHat were the symptoms when they started to go away????

V10