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 Having a problem with GM 12 bolt rear end? We offer a complete line of rear end parts for the GM 8.875" commonly refered
to as the 12 Bolt truck differential, this differential was utalized GM used this
very popular differential in there full size Chevrolet trucks starting in 1964 to
1982. Our inventory includes ring gear and pinion sets, including aftermarket and
OE gear sets. We are able to supply axles, bearing overhaul kits, carriers, cases,
spider and side gears. Positraction units we offer include Lockrights by Powertrax,
Auburn, Detroit Lockers, Trac Loc and ARB air lockers. We are a Dana Spice volume
distributor and offer a complete line or ring gear and pinions to the large Dana
80 differential. In addition to the Dana Spicer line we quality offer differential
products.
Specifications are provided below to assist you in the identification and setup as
well as torque spec's for your Chevy or GM 8.875" differential.
GM 8.875" 12 Bolt Differential Ring Gear and Pinion
Set |
Quaility Gears provide guaranteed performance
|
This
new Redline synthetic gear oil is recommended for replacement when replacing ring
gear pinion sets and or bearings, your cost only $9.95 qt. See other Red
Line Oil Products that we recommend.
|
| Part Number |
OE Number |
Ratio
|
Teeth
|
Price
|
| GM12-308 |
|
3.08
|
40-13
|
$214.94
|
| GM12-342 |
|
3.42
|
41-12
|
$214.94
|
| GM12-373 |
|
3.73
|
41-11
|
$214.94
|
| GM12-373X* |
|
3.73
|
41-11
|
$214.94
|
| GM12-411 |
|
4.11
|
39-9
|
$214.94
|
| GM12-411X* |
|
4.11
|
37-9
|
$214.94
|
| GM12-456 |
|
4.56
|
41-9
|
$214.94
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| *Fits 2.76 go 3.42 Case |
GM 8.875" 12 Bolt Differential Parts |
|
|
|
| Description |
Part Number
|
Price
|
|
| Case, Empty Open 8.875" 3.73 -UP |
6258086
|
$185.25
|
|
| Case, Empty Open 8.875" 3.42 -Down |
6258088
|
$395.00
|
|
| Bearing/Overhaul Kit 8.875" Rear |
DTSR12RMK
|
$102.82
|
|
| Internal Kit 8.875" 30 spline Open (spider/side gears, cross shaft thrust washer) |
GM12BI
|
$116.26
|
| Axle 30 Spline, 65-69 30 3/4" long 6 holes R&L |
PA6068
|
$142.52
|
Installation Tool, Your Cost $49.98 + S&H
|
| Axle 30 Spline, 65-69, 6 hole to 5 hole conversion L&R. 30 3/4" length. |
PA5855
|
$157.57
|
|
| Axle 30 Spline 4wd 70-81 31 9/32" length 6 hole |
PA5383
|
$136.86
|
|
| Axle 30 Spline 2wd 70-81 31 5/16" length 5 hole |
PA5569
|
$136.86
|
|
GM 8.875" 12 Bolt Differential Positraction Units |
|
|
Whats the difference in Positractions?
Differentials
whats the Difference |
|
Description
|
Part Number
|
Price
|
| Auburn Limited Slip Positraction 30 Spline |
542032
|
$449.29
|
| Auburn Limited Slip Positraction 30 Spline |
542034
|
$449.29
|
| Detroit Locker 30 Spline |
187C150A
|
$531.20$
|
| Eaton Large Hub GM GM Truck 1961-1980, 30 spline, 3.42 &
down |
19587-010
|
$442.86
|
Recommended replacement for non-repairable non-working
GM stock Gov-loc positraciton |
| Eaton Large Hub GM Truck 1961, to 1980 30 spline, 3.73 &
up |
19556-10
|
$442.82
|
| LockRight 1/2 Ton Pickup 30 Spline |
1910
|
$297.72
|
|
| no-Slip Powertrax 30 spline |
92-0788-3005
|
$452.76
|
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We offer a complete line of products to improve the perfromance of your vehicle, check out the following links:
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Rear End & Differential Ring Gear and Pinion Sets 
