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We are available at (714) 875-2414.
 

12 Bolt GM Truck

12 Bolt GM Truck

11-1/2"
12 HOLES
Irregular Gasket Pattern


  • RG Diameter 8.875"
  • 12 3/8" X 24 RH Threaded Bolts
  • PINION Diameter 1.438", 30 Spline

    CASE: 2.56 -2.73, 2.76-3.42 & 3.73 Numerically Higher

    8620 Material Heat-Treated

    Assembly Specifications:

  • Cover Bolt Ft. Lbs. 20
  • Pinion Brg. Preload In. Lbs 24-25
  • Pinion Brg. Preload In. Lbs 10-15 Used
  • Ring Gear Backlash .005-.009
  • Ring Gear Bolt to case Ft. Lbs. 90
  • Side Brg. Caps Ft. Lbs. 60

GM 8.875" 12 Bolt Applications 1/2 & 3/4 ton trucks

Model Year
G20, G25 64-82
G10, G15 64-81
K10, K15, C10, C15 64-82

 

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12 BOLT GM PASSENGER MASTER INSTALL KIT
12 BOLT GM PASSENGER MASTER INSTALL KIT
$89.32
SKU: MK GM12P
12 BOLT GM PASSENGER MASTER INSTALL KIT Learn More

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12 BOLT GM TRUCK MASTER INSTALL KIT
12 BOLT GM TRUCK MASTER INSTALL KIT
$89.32
SKU: MK GM12T
12 BOLT GM TRUCK MASTER INSTALL KIT Learn More

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12T 3.73 & UP DETROIT LOCKER
12T 3.73 & UP DETROIT LOCKER
$645.70
SKU: DET187C-150A
12T 3.73 & UP DETROIT LOCKER Learn More

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12T GM 2.76-3.42 AIR LOCKER
12T GM 2.76-3.42 AIR LOCKER

Regular Price: $935.00

Special Price: $575.00

SKU: ARBRD11
12T GM 2.76-3.42 AIR LOCKER Learn More

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12T GM 3.08 R&P
12T GM 3.08 R&P

Regular Price: $214.50

Special Price: $184.43

SKU: GM12T-308-NG
12T GM 3.08 R&P Learn More

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12T GM 3.08 R&P
12T GM 3.08 R&P
$197.20
SKU: GM12T-308-MG
12T GM 3.08 R&P Learn More

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12T GM 3.42 R&P
12T GM 3.42 R&P
$197.20
SKU: GM12T-342-MG
12T GM 3.42 R&P Learn More

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12T GM 3.73 R&P
12T GM 3.73 R&P

Regular Price: $242.00

Special Price: $187.92

SKU: GM12T-373-NG
12T GM 3.73 R&P Learn More

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12T GM 3.73 R&P
12T GM 3.73 R&P
$197.20
SKU: GM12T-373-MG
12T GM 3.73 R&P Learn More

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12T GM 3.73 THICK R&P (FITS 2.76-3.42 CASE)
12T GM 3.73 THICK R&P (FITS 2.76-3.42 CASE)

Regular Price: $244.20

Special Price: $216.91

SKU: GM12T-373T-NG
12T GM 3.73 THICK R&P (FITS 2.76-3.42 CASE) Learn More

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12T GM 3.73 THICK R&P (FITS 2.76-3.42 CASE)
12T GM 3.73 THICK R&P (FITS 2.76-3.42 CASE)
$222.14
SKU: GM12T-373T-MG
12T GM 3.73 THICK R&P (FITS 2.76-3.42 CASE) Learn More

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12T GM 4.10 R&P
12T GM 4.10 R&P
$209.40
SKU: GM12T-411-MG
12T GM 4.10 R&P Learn More

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12T GM 4.11 THICK R&P (FITS 2.76-3.42 CASE)
12T GM 4.11 THICK R&P (FITS 2.76-3.42 CASE)

Regular Price: $244.20

Special Price: $208.79

SKU: GM12T-411T-NG
12T GM 4.11 THICK R&P (FITS 2.76-3.42 CASE) Learn More

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12T GM 4.11 THICK R&P (FITS 2.76-3.42 CASE)
12T GM 4.11 THICK R&P (FITS 2.76-3.42 CASE)
$274.24
SKU: GM12T-411T-MG
12T GM 4.11 THICK R&P (FITS 2.76-3.42 CASE) Learn More

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12T GM 4.56 R&P
12T GM 4.56 R&P

Regular Price: $226.60

Special Price: $193.71

SKU: GM12T-456-NG
12T GM 4.56 R&P Learn More

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12T GM 4.56 THICK R&P (FITS 2.76-3.42 CASE)
12T GM 4.56 THICK R&P (FITS 2.76-3.42 CASE)

Regular Price: $226.60

Special Price: $201.83

SKU: GM12T-456T-NG
12T GM 4.56 THICK R&P (FITS 2.76-3.42 CASE) Learn More

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12T GM 4.88 R&P
12T GM 4.88 R&P

Regular Price: $244.20

Special Price: $216.91

SKU: GM12T-488-NG
12T GM 4.88 R&P Learn More

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12T GM 4.88 THICK R&P (FITS 2.76-3.42 CASE)
12T GM 4.88 THICK R&P (FITS 2.76-3.42 CASE)

Regular Price: $296.04

Special Price: $286.51

SKU: GM12T-488T-NG
12T GM 4.88 THICK R&P (FITS 2.76-3.42 CASE) Learn More

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12T GM 5.13 R&P
12T GM 5.13 R&P

Regular Price: $243.10

Special Price: $215.75

SKU: GM12T-513-NG
12T GM 5.13 R&P Learn More

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GM 12 65-69 Truck Left OR Right 30.75 30 Spline 6 LUG
GM 12 65-69 Truck Left OR Right 30.75 30 Spline 6 LUG

Regular Price: $156.00

Special Price: $150.00

SKU: G3893605
Rear Axle; GM 12 65-69 Truck Left or Right 30.75 30 Spline Learn More

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