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AMC20 Rear End, Differential Ring and Pinions, Change Ratio Improve Fuel Economy or Off Road Power!

Automotive Parts Warehouse and Installation Repair Center serving Metropolitan Minneapolis MN area, We ship worldwide! See a complete list of products we offer at www.provenforce.com

Running the incorrect ring and pinion differential ratio can cost you a lot of money!

  • Parts may vary, click to see detail Parts may vary, click to see detail
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AMC 20 Rear End Ring and Pinions Plus Parts.

We offer a wide range of differential rear end repair parts and upgraded assemblies plus installation services for domestic vehicles including AMC and Jeep including the following models: Ambassador, AMX, Concord, Gremlin, Hornet, J10, Javelin, Jeep CJ, Marlin, Matador, Pacer, Rambler, Rebel, Scrambler, Spirit and Wagoneer. Rear end parts are available for this popular 8.875" rear end, see application list. Check mechanical specification listing to insure that you have identified the correct rear end.

Long life AMC 20 Rear End parts, guaranteed performance, quiet running ring and pinion gears:

  • CNC start to finish
  • Central contact pattern
  • Solid shank pinion shaft
  • Computer controlled heat treating
  • 8620 Steel
  • Strict quality control
  • Easier Setup Superior Strength
  • Warrantied for 12 months 12,000 miles from date of purchase material.

See detailed product line listings that includes: ring and pinion sets, bearing overhaul kits, differential parts, positractions and axles and axles bearings and seals. We also have axles and positractions for the AMC 20 8.875" Rear End. Why you might want to change your ring and pinion ratio.

Illustrated in the image above is a complete ring and pinion set plus a master bearing overhaul kit that includes pinion bearing, pinion seal, carrier bearings, shim kit, ring gear bolts and gasket. If you need better traction (for mud, snow or off road performance) Positractions unit are also available.

AMC Jeep AMC20 Rear End Differential Application Guide
MODEL YEAR MODEL# YEAR
AMBASSADOR                    68-74       MARLIN
69
AMX                          68-79        MATADOR                     
72-78
JEEP CJ 76-86 PACER V8                
78-79
CONCORD                 78-79        RAMBLER                                                               
69      
GREMLIN V8               70-76        REBEL                      
69 
HORNET V8                       73-77        SCRAMBLER                 
76-86
J10                                80-86        SPIRIT V8                 
79  
JAVELIN V8                      70-74        WAGONEER                       79-86
JEEP CJ 74-86
AMC & JEEP        

POWER UP! For Off Roading or higher ratio for increased mileage.

GEARS DESIGNED TO MEET YOUR APPLICATION REQUIREMENTS, LOW GEAR RATIO FOR ADDITIONAL POWER AND LOW END PERFORMANCE OR HIGHER GEAR RATIO FOR IMPROVED MILEAGE!

Specifications

  • 10-1/32" X 10-25/64"
  • 12 HOLES ROUND

amc rear end gasket

  • RING GEAR DIAMETER 8.875"
  • 8 7/16" X 20 RH THREADED BOLTS
  • PINION DIAMETER 1.625" 28 SPLINES
  • CASES: 2.73 & NUMERICALLY LOWER 3.08 & NUMERICALLY HIGHER
  • 8620 Material - Heat Treated
MOTIVE GEAR® RING AND PINIONS
PART NUMBER OEM Part Number
TEETH
RATIO
YOUR COST
AM20-331 MW8132700              
43-13      
3.31    
$216.98
AM20-354 MW4486825
39-11      
3.54   
$229.99
AM20-373 MW8133179            
41-11      
3.73      
$219.91
AM20-410 MW8127072            
41-10      
4.10      
$219.91
AM20-456 MW8124410            
41-9        
4.56      
$219.91
AM20-488 N/A
39-8
4.88
$219.91
AMC® 20 STYLE INSTALLATION KITS & DIFFERENTIAL COMPONENTS 1964 - 1988
MASTER BEARING OVERHAUL KIT MWR20RMK
$90.97
MASTER KIT TIMKENKEN BRGS MWR20RMKT
$108.92
PINION SHIMS MW1127                         
$16.61
CARRIER SHIMS MW1130                          
$14.25
CRUSH SLEEVE MW3507575                    
$2.96
PINION SEAL MW470331N                  
$5.99
PINION NUT MW379570S                   
$3.95
RING GEAR BOLT MWD8OZ4216B                             
$1.85
COVER GASKET MW5123        
$3.49

 

AMC 20 AXLES PART NUMBER DESCRIPTION LENGTH LUGS SIDE SPLINE YOUR COST
  3150046K AXLE BEARING KIT 2 PC AXLE CUP & CONE NUT, KEY SEAL         $21.99
 

8127070

2 PC. CJ 1976-1982 26 1/4"
5
LH
29
$59.99
  8127071 2 PC. CJ 1976-1982 29"
5
RH
29
$59.99
  8127079 CJ W/QUADRATRAC T/C 1976-1986 33 1/2"
5
LH
29
$74.94
  8127081 CJ W/QUADRATRAC T/C 1976-1986 22"
5
RH
29
$74.94
  8133730 AXLE HUB ASSEMBLY FOR 2PC. AXLE  
$52.92
  8133885 2 PC. AXLE CJ 1982-1986 28 1/2"
5
LH
29
$59.99
  8133886 2 PC. AXLE CJ 1982-1986 31 1/2"
5
RH
29
$47.97
  AM20CJE 1 PC. CJ AXLE KIT (REPLACE 2 PC.) 1976-1982  
5
PAIR
29
$240.90
  AM20CJL 1 PC. CJ AXLE KIT (REPLACE 2 PC.) 1983-1986  
5
PAIR
29
$227.97
  AM20Q 1 PC. CJ AXLE KIT (REPLACE 2 PC.) 1976-1986 W/QUADRATRAC T/C  
5
PAIR
29
$398.88
POSITRACTIONS EATON AXLE DIA. RATIO    
  187SL47A DETROIT LOCKER 1.27 3.08 UP   $1048.98
  187SL163A DETROIT LOCKER 1.27 2.73 DN   $1048.98
  912A579 TRUETRAC 1.27 3.08 UP   $945.95
  912A573 TRUETRAC 1.27 2.73 DN   $909.89
  813A016 EZ LOCKER 1.27 3.08 UP   $399.93
  813A016 EZ LOCKER 1.27 2.73 DN   $399.93
  SLM20-29 Spartan Locker, Yukon, more information       $386.64
Shipping charges will be added, $25.00 minimum order including freight.  

Our Service Center provides mechanic services of skilled and trained mechanics to assist in keeping your vehicle in top running order. We have 3 bays service/installation and offer guaranteed workmanship and parts we can change your AMC20 ring and pinion for you. Walk-ins are welcomed and in most cases we offer same day service. Trying to determine what ring and pinion ratio or differential parts you need or having problems diagnosing your vehicles performance we offer Free Technical support and test drives to assist you