GM 8.875" 12 Bolt DIFFERENTIAL COMPONENT PARTS

We offer a complete line of rear end parts for the GM 8.875" commonly refered to as the GM12 Bolt differential, this differential was utalized GM used this very popular differential in there full size Chevrolets, Chevelle, Chevy II, Camero, Nova, Oldsmobile F85 and GTO/Firebird Pontiac products starting in 1965 to 1972. 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 8.8755" differential.

GM 8.875" 12 Bolt Applications Model Year Model Year Chevrolet 65-72 Firebird GTO 70-72 Chevy II 65-72 Nova 70-72 Chevelle 65-72 Olds F85 68-69 Camaro 67-72     What differential ratio do you have? Need information on how to setup ring and pinion backlash Purchase your parts @ drivetrain.com and receive telephone access to experienced differential technician to assist you with installation, we help you solve the problem.

10-7/8" 12 HOLES Oval Gasket Pattern SPECIFICATIONS RG Diameter 8.875" 12 3/8" X 24 RH Threaded Bolts PINION Diameter 1.625", 30 Spline CASE: 3.73 & Down, 3.30 Numerically Higher 8620 Material Heat-Treated Assembly Specifications: Cover Bolt Ft. Lbs. 20 Pinion Brg. Preload In. Lbs 20-25 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 Ring GEAR and Pinon Sets
Part Number	OE Number	Ratio	Teeth	Price
G888308		3.08	40-13	$337.50	Your Cost $48.98 + S&H.
G888342		3.42	41-12	$215.00
G888355		3.55	39-11	$328.16
G888373		3.73	41-11	$215.00
G888390		3.90	39-10	$328.16
G888411		4.11	41-10	$215.00
G888411X		4.11	41-10	$250.00
G888430		4.30	43-10	$290.83
G888433		4.33	39-3	$290.83
G888456		4.56	41-9	$309.41
G888456X		4.56	41-9	$309.41
G888488		4.88	39-8	$236.08
G888488X		4.88	39-8	$309.41
G888514		5.14	36-7	$246.50
G888538		5.38	43-8	$346.91
G888557		5.57	39-7	$346.91
G888586		5.86	41-7	$346.91
G888614		6.14	43-7	$346.91
X= Fits 3.07 - 3.73 Case

GM 8.875" 12 Bolt Differential Parts

Description	Part Number	Price	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.
Case, Empty 8.875" 3.73 -UP OEM	6258086	$208.33
Bearing/Overhaul Kit 8.875"	DTSR12CRMK	$102.62
Internal Kit 8.875" Open (spider/side gears, cross shaft thrust washer)	GM12BI	$116.00
Axle 30 Spline, 5 holes, R&L. 30 1/16" length. 68-72 Chevelle & El Camino, 70-72 Camaro	PA5769	$168.39	TOUGH Axles! Superior Alloy Induction Hardened Rolled Splines 35% stronger than cut splines 2 Year Warranty!
Axle 30 Spline, 5 holes, R&L. 29 9/16" length. 68-72 Chevy II, 67-69 Camaro, 65-67 Chevelle	PA5770	$168.39

GM 8.875" 12 Bolt Positraction Differential Assembly Options

Description	Part Number	Price	Whats the difference in Positractions? Check out Differentials whats the Difference
Auburn Limited Slip Positraction 30 Spline 4.0/up	542031	$475.00
Lockright 30 spline	1910	$297.72
No-Slip Powertrax 30 spline	92-0788-3005	$452.76
Eaton Positraction Series 3 car, 30 Spline 3.07 to 3.73	19554-010	$414.29

In addition to the General Motors 12 bolt 8.875 inch differential parts and accessories listed here, we also provide an impressive list of automotive after market products for car, pickup truck, SUV and 4wd repair parts and accessories that includes rear end covers, ring and pinion gears, OE clutches and heavy duty performance clutches, diesel gauge kits, exhaust brakes, re manufactured manual transmissions and both manual and automatic overhaul kits. Other products we offer for the RV recreational vehicle market include REMCO drivelinedisconnects, tow bar and baseplates and auxiliary overdrive units to improve vehicle performance and save fuel. We have a complete 4 wheeling drivetrain product line including complete differential assemblies, limited slip and other solid locking positractions. We offer transmission conversion kits including the NV4500 and NV5600 as well as replacement kits for light duty GM and Jeep transmissions. You may be interested in visiting our Ford and Powerstroke Diesel page, Dodge Ram and other Jeep pages for detailed information.

Watch for future additions of new products to be added to our on-line catalog including advanced wheels, tires, engine tune-up kits and other accessories.

Our large question and answer data base it's provided for you it provides additional information that may be of interest to you. Our easy to use vehicle information data base is cataloged by vehicle manufacture, part or component, to review just select Q&A data.

From time to time we offer specials discounts to our registered Internet customers, click below to register and receive advance notice of new products, special bonus offers and to be eligible for our free random gift drawings, we protect your e-mail address we, don't sell, trade or abuse it.

If it's a part and or a components under your vehicle we can supply it!

To order you can complete our easy to use secure electronic order form,

Or you can call the order desk at 1-800-216-1632, talk to a knowledgeable technician.

Considering purchasing parts from drivetrain.com and have questions contact Tech line at 1-702-876-3100 or send e-mail.

Drivetrain Specialists of Las Vegas - Las Vegas NV, 89102