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Home arrow Ring and Pinion Sets arrow GM 8.5" 10 Bolt




  

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Chevrolet 8.5" Ring and Pinions Sets and Differential Parts Print E-mail

Having problems with Chevrolet GM 8.5 10 bolt rear end?  This 10 bolt rear end is sometime refered to as 10 bolt differential, 10 bolt and 10 bolt truck rear end. We offer the most complete line of rear end parts Chevrolet and GMC 10 Bolt 8.5 Ring and Pinions Setsutilized GM used this very popular differential in there full size


 gear_guy.jpgWant to search for rear end parts by application, ask the Gear Wizzard

Chevrolets, Chevelle, Chevy II, Camaro and and GTO/Firebird Pontiac products starting in 1970. Full size Blazer, C10, K10 front starting in 1977, K1500 and K2500 Front IFS starting in 1988, the Rear in C10, K10 Blazer in the rear starting in 1980 to 1994. 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.

for the GM 8.5" commonly referred to as the 10 Bolt differential, this differential was

Positraction units we offer include Lockrights, Powertrax no-Slip, Auburn, Detroit Lockers, Eaton Posi, TrueTrac and ARB air lockers. We offer the following quality differential products.

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* Auburn Positraction, 3.08 to 4.10 ratio rear end package; including Positraction, Ring and Pinion Set and Master Bearing Overhaul kit your cost only $749.00 plus S&H

* Purchase today and get wheel bearing and seal kit 1991 and earlier for only $24.99, 1992 and later model years wheel bearing and seal kit $49.99.  

 

  Order today mechanics set up tools, you pay only 48.98!

 

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DurGrip Positraction, 3.08 to 4.10 ratio, rear posi-package includes Positratraction Unit, Ring and Pinion Gear set and Master Bearing Overhaul Kit, your cost $699.00 plus S&H.

*Eaton Positraction Unit 3.08 to 4.10 rear posi-package includes Positraction, Ring & Pinion Set and Master Bearing Overhaul kit your cost only $749.00 plus S&H.

* Purchase today and get wheel bearing ans seal kit 1991 and earlier for only $24.99, 1992 and later model years wheel bearing and seal kit $64.99.

Specifications are provided below to assist you in the identification and setup as well as torque spec's for your Chevy or GM 8.5" differential.

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Applications

Model Year Model

Year

Chevrolet 70-76 Trans-AM

72-81

Chevelle 70-76 C10, K10 & K20 Front

77-87

Chevy II 70-75 Blazer Front

77-91

Camaro 70-81 C10, K10 & Blazer

80-94

GTO/Firebird 70-81 K1500 Front IFS 88 & Up
Olds F-85 70-76 K2500 Front IFS 88 & Up
Z-28 72-81    

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.

 

Specifications

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10-5/8"
10 HOLES
Irregular Gasket Pattern

  • RG Diameter 8.50"
  • 10 7/16" X 20 LH Threaded Bolts
  • PINION Diameter 1.626", 30 Spline

    CASE: 2.56 & Down, 2.73 Numerically Higher

    8620 Material Heat-Treated

    Assembly Specifications:

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

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Differential Ring Gear and Pinion Sets

Quality Gears provide guaranteed performance

Part Number OE Number

Ratio

Teeth Price
GM10-308 1258709

3.08

40-13

$207.33

GM10-342 1258710

3.42

41-12

$207.33

GM10-373 1259441

3.73

41-11

$207.33

GM10-373IFS  

3.73

41-11

$241.66

GM10-411 26009753

4.11

37-9

$208.33

GM10-411IFS  

4.11

37-9

$291.66

GM10-456  

4.56

41-9

$208.33

GM10-456IFS  

4.56

41-9

$294.66

G885488  

4.88

39-8

$241.66

G885513  

5.13

41-8

$241.66

G885342IFS  

3.42

41-12

$241.66

G885373IFS  

3.73

41-11

$241.66

G885411IFS  

4.11

37-9

$241.66

G885456IFS  

4.56

41-9

$241.66

Is your GM 10 Bolt to weak for your application see our 14 Bolt drop-in replacement differential assembly, it is the answer to your problem. You can use your existing wheels and tires.

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Differential Parts

Description

Part Number

Price

 

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Order above high performance synthetic oil and friction additive combo kit at time of order for ring and pinion or bearing overhaul kit and pay only $49.95 plus S&H, a $54.00 value. Red Line Oil Products that we recommend.

Case, Empty 8.5" 2.73 -UP OEM

SA65-2021

$116.67

Case, Loaded 8.5" 28 spline 2.73 up

MW-GM10L-28

$225.75

Case, Loaded 8.5" 30 spline 2.73 up

MW-GM10L-30

$235.75

Bearing/Overhaul Kit 8.5" Rear 1998 Older no-posi

DTSR10RMK

$86.76

Bearing/Overhaul Kit 8.5" Rear 1998 Older with-posi

DTSR10REMK

$97.77

Bearing/Overhaul Kit 8.5" Front

SA35-2021F

$97.33

Internal Kit 8.5" 28 spline Open (spider/side gears, cross shaft thrust washer)

SA85-2021B

$123.99

Internal Kit 8.5" 30 spline Open (spider/side gears, cross shaft thrust washer)

SA85-2021A

$123.99

 
Installation Kit use when installing a new ring and you don't what new bearings . Kit includes new ring gear bolts, pinion seal, nut, crush sleeve, shims. Carrier shims marking compound and gasket.

DSGM8.5IK

$63.75

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Axle 28 Spline, 82-88Jimmy/Blazer, 81-88 Chevy P/U s0 series, 81-87 GMC 1500 Series, 81.88 Suburban 10 & 1500 series. 5 holes, R&L. 31 5 /16" length.

PA5384

$140.99

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Installation Tool, Your Cost $48.98 + S&H.

Axle 30 Spline, with IFS 4WD 88-98 Chevy Truck 1500 series, 88-98 GMV 1500, 92-98 Suburban 1500, 92-98 Tahoe/Yukon, 6 hole L&R. 33" length.

PA5532

$120.99

Axle 30 Spline Van 88-95 10 & 20 Series, 88-95 GMC Van 1500 & 2500 Series, 5 hole R&L 33 5/16" length.

PA5561

$140.90

Axle 28 Spline Van 75-88 Chevy Van 10 Series, 79-88 Chevy Van 20 Series, 75-88 GMC Van 10 Series, 79-88 GMC Van 20 Series, 33 5/16" length.

PA5563

$124.17

Axle 30 Spline 2WD 88-98 Chevy & GMC Truck 1500, 92-98 Suburban 1500, 92-98 Tahoe & Yukon, 5 hole R&L 31 13/16" length.

PA5650

$124.17

Axle 28 Spline 2WD 79-89 Blazer, Jimmy, 79-87 Chevy& GMC Truck C10/C1500, 79-89 Suburban C10/C1500, 5 hole R&L 31 3/8" length.

PA5694

$114.17

Axle 30 Spline 2WD 88-91 Blazer & Suburban 10/1500, 5 hole R&L 31 3/8" length.

PA5695

$126.86

Axle 28 Spline 73-77 Chevelle & El Camino 5 hole R&L 30 7/16" length.

PA5774

$136.97

Axle 28 Spline 73-77 Chevelle & El Camino 10 hole R&L, 30 7/16" length.

EV10-3

$ 302.00

EV Kit includes bearings, seals and studs. 10 holes allow for dual bolt patterns to allow for upgrading to larger studs.
   

 

Seal, Axle Car 2.25 Outside Diameter

NAT8660S

$5.57

 
Seal, Axle Truck 2.535 Outside Diameter

NAT8835S

$5.57

 
Seal, 4x4 Front Axle Shaft Inner

NAT5131

$16.98

 
Pinion Seal Rear

NAT1537

$15.37

 
Pinion Seal 4x4 Front

NAT8622

$17.50

 
Bearing, Axle     Available to many to list please call for quotation.
Differential Cover
GM 1970 up 1500 Truck, Suburban 1500 & 2500, Blazer, Vans & some Cars, Increase the fluid capacity, you will find that the fluid will run 15 to 20 degrees cooler. 1.5 quarts to 4 quarts, 3 1/4" overall height

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DTSGM10Bolt8.5

$255.00

 

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Differential Positraction Units

Description

Part Number

Price





What's the difference in Positraction's?
Differentials what's the Difference
ARB Airlocker 28 Spline 2.73 and up

RD10

$1115.80

ARB Airlocker 30 Spline 2.73 and up

RD28

$1115.80

Auburn Limited Slip Positraction 28 Spline

542018

$498.95

Auburn Limited Slip Positraction 30 Spline

542022

$498.95

Detroit Locker 28 Spline

187C149A

$808.19

Detroit Locker 30 Spline

187C148A

$808.19

Detroit Tru-Trac 28 Spline Front

913A332

$571.25

 
Detroit Tru-Trac 28 Spline Rear

912A556

$529.16

 
Detroit Tru-Trac 28 Spline Rear

912A557

$529.16

 
Eaton Large Hub GM Car, 1971-1988, GM Truck 1980-1988, 28 spline, 2.76 & up

19557-010

$529.05

Recommended replacement for non-repairable non-working GM stock Gov-loc positraciton
Eaton Large Hub GM Car, GM Truck 1988, & later 30 spline, 2.76 & up

19559-010

$529.05

LockRight 1/2 Ton Pickup, Jimmy, Blazer, Suburban 77-88 Front 28 Spline

1920

$290.59

 
LockRight 1/2 Ton Pickup, Jimmy, Blazer, Suburban Thru 88 Rear 28 Spline

1920

$290.59

 
LockRight  1/2 Ton Pickup, Jimmy, Blazer, Suburban 30 Spline 89-98

1921

$290.59

 
no-Slip Powertrax 28 spline

92-0785-2805

$445.96

 
no-Slip Powertrax 30 spline

92-0785-3005

$445.96

 

Differential Assemblies

  Drum to Drum Disk to Disk - complete assemblies including axles, ring gear, pinion, internal kit to brake flanges some units even have brakes including hubs.
Description

Part Number

Price

GM 10 Bolt 8.5" Open Carrier with drum brakes & 6 lug axles

SIXGM10-410

$1010.54

GM10 Bolt 8.5" Open Carrier with drum brakes & 5 lug axles

SIXGM10-410 2WD

$1100.00

GM10 Bolt 8.5" front axle Open Carrier 3.07 Ratio

SIXGM10F-307

$955.53

GM8.25" front axle IFS Open Carrier 373 Ratio
 SIXGM825IFS-373
$966.85

 
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