CLASS RACER FORUM - View Single Post

Mike Taylor 3601 · 03-04-2010, 10:01 AM

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

03-04-2010, 10:01 AM	#8
Mike Taylor 3601 VIP Member Join Date: Oct 2008 Location: Somerset,Ky Posts: 1,372 Likes: 358 Liked 308 Times in 103 Posts	Re: 12 Bold Chevy & Dana 60 Rear 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