Even at 30 splines, the 12-bolt's greatest weakness is the lame direct-acting bearing, c-c
We specified Ford "big bearing" tube ends and sealed axle bearings. Available in a few fla
The stock Chevy brake backing plate has a 2.7-inch center hole. To accommodate the Ford ax
Mike runs Centerline rims, so he specified the optional 5/8-inch-long wheel studs for $80.
Mike selected a 33-spline Moser spool (left) instead of a clutch-type Posi-Traction unit.
The optional cast-aluminum inspection cover ($135) features pre-load adjusters that bear g
Our thanks to Jim Cook and Performance Differential for providing disassembly and reassemb
OE Fortification: False Economy?
If you're maybe thinking you can get it done cheaper the old-fashioned way, here's a ballpark cost analysis of what it takes to refurbish and fortify a stock GM 12-bolt rear axle. The total amount is within striking distance of the Moser base price. As for the shipping charges, contact Moser for specific pricing, but rest assured you may spend more running all over town rounding up parts if you attempt this in do-it-yourself mode. Think it over, then make the call!
*Used 12-bolt case housing: $100 to $250 (when you can find one)
*Re-tube 12-bolt case to your width: $379
*Custom axle tube ends: $80
*Custom alloy axle shafts: $315
*Differential setup kit: $100
*1350-series pinion yoke: $130
*Upgraded wheel studs: $80
*Setup labor: $125
TOTAL = $1,645 to $1,795