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(520) 327-1747  |   info@westerndiff.com  | 3825 E Kleindale Rd Tucson, AZ 85716

Custom GM 12 Bolt

Custom GM 12 Bolt Differentials are built to order

Western Differential can customize New GM 12 Bolt car housings casted from Nodular Iron from either Currie Enterprises, Strange Engineering or Moser Engineering. We can also rebuild or upgrade an existing GM 12 Bolt Factory car or truck housing.

Complete New GM 12 Bolt Housing

  • Moser Engineering Housing -No Brackets- (Includes shipping housing to our location to build)
  • Your choice of Most Gear Ratios
  • 1310, 1330 or 1350 Pinion Yoke
  • 30 Spline Auburn Limited Slip Posi
  • All New Timken Bearings and National Seals
  • 30 Spline Strange Engineering P-type (non c-clip) Axles with Timken Set-20 Axle Bearings and Studs
  • New Chrome Differential Cover

$2,625.00

GM 12 Bolt Posi Upgrades

  • With 30 Spline 3.08-3.90 Motive Grip LS = $2,550.00
  • With 30 Spline 4.11 & Up Motive Grip LS = $2,560.00
  • With 30 Spline 3.08-3.90 Eaton Limited Slip = $2,620.00
  • With 30 Spline 4.11 & Up Eaton Limited Slip = $2,660.00
  • With 30 Spline 3.08-3.90 TrueTrac = $2,685.00
  • With 30 Spline 3.08-3.90 Detroit Locker (Do Not Recommend for Street) = $2,915.00
  • With 33 Spline 3.08-3.90 Auburn = $2,725.00
  • With 33 Spline 4.11 & Up Auburn = $2,725.00
  • With 33 Spline 3.08-3.90 TrueTrac = $2,700.00
  • With 33 Spline 4.11 & Up TrueTrac = $2,730.00
  • With 35 Spline 3.08-3.90 Detroit Locker (Do Not Recommend for Street) = $2,915.00
  • With 35 Spline 3.08-3.90 Wavetrac = $3,020.00
  • With 35 Spline 4.11 & Up Wavetrac = $3,020.00

GM 12 Bolt Housing Upgrades (Includes Brackets and Weld Time)

  • New 2" Leaf Spring Pads = Add $60.00
  • New 2.5" Leaf Spring Pads = Add $50.00
  • Mono Leaf Spring Pads = Add $115.00
  • Multi Leaf Spring Pads = Add $125.00
  • 1964-1967 A Body Brackets = Add $385.00
  • 1965-1970 A Body Brackets = Add $385.00
  • 1965-1970 Full Size Car Brackets = Add $385.00
  • 1978-1987 G Body Brackets = Add $385.00
  • 1960-1972 Chevy C10 Pickup Trailing Arm and Panhard Brackets = Add $370.00
  • For Other Car Applications Please Give Us A Call At (520)-327-1747

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