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RING & PINION GEAR SETS
For use with GM Axles

Sierra Gear & Axle has a complete inventory of Ring & Pinion Gear Sets for use with GM axles.

Our Ring and Pinion sets are reasonably priced and are the highest quality aftermarket gear sets available. Ring and Pinion Gear Sets from Sierra Gear are engineered and manufactured for easy setup, quiet operation and long life.

Complete your differential ratio change, rebuild, repair or overhaul with one of our Differential Repair and Installation Kits.

Not sure which ring and pinion gear ratio you want? Use our Differential Gear Ratio Calculator or call one of our technical experts for advice.

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Application Chart:

Ring and Pinion Gear Sets for use with GM Differentials

GM AXLES– Ring and Pinion Gear Sets

’55 GM Passenger Sierra Gear & Axle Part #
’55 GM Passenger 3.08 Ratio R&P SG GM55P-308
’55 GM Passenger 3.55 Ratio R&P SG GM55P-355
’55 GM Passenger 3.55 Ratio Premium R&P SGPGM55P-355
’55 GM Passenger 3.70 Ratio R&P SG GM55P-370
’55 GM Passenger 3.70 Ratio Premium R&P SGPGM55P-370
’55 GM Truck Sierra Gear & Axle Part #
’55 GM Truck 3.38 Ratio R&P SG GM55T-338
GM Corvette Sierra Gear & Axle Part #
Corvette 3.55 Ratio R&P ’63-’79 SG GMVET-355
Corvette 3.73 Ratio R&P ’63-‘ 79 SG GMVET-373
C5 Corvette Getrag 3.42 Ratio R&P ’97-’05 SG GMVET-342GR
C5 Corvette Getrag 3.73 Ratio R&P ’97-’05 SG GMVET-373GR
C5 Corvette Getrag 3.90 Ratio R&P ’97-’05 SG GMVET-390GR
C5 Corvette Getrag 3.90 Ratio R&P ’97-’05 THICK SG GMVET-390GRT
C5 Corvette Getrag 4.11 Ratio R&P ’97-’05 SG GMVET-411GR
C5 Corvette Getrag 4.11 Ratio R&P ’97-’05 THICK SG GMVET-411GRT
7.25″ GM IFS Front Sierra Gear & Axle Part #
7.25″ GM IFS Front 4.11 Ratio R&P SG GM7.25-411R
7.25″ GM IFS Front 4.56 Ratio R&P SG GM7.25-456R
7.5″ & 7.625″ GM Sierra Gear & Axle Part #
7.5″ & 7.625″ GM 2.73 Ratio R&P SG GM7.5-273
7.5″ & 7.625″ GM 3.08 Ratio R&P SG GM7.5-308
7.5″ & 7.625″ GM 3.23 Ratio R&P SG GM7.5-323
7.5″ & 7.625″ GM 3.42 Ratio R&P SG GM7.5-342
7.5″ & 7.625″ GM 3.42 Ratio R&P THICK SG GM7.5-342T
7.5″ & 7.625″ GM 3.73 Ratio R&P SG GM7.5-373
7.5″ & 7.625″ GM 3.73 Ratio R&P THICK SG GM7.5-373T
7.5″ & 7.625″ GM 3.90 Ratio R&P SG GM7.5-390
7.5″ & 7.625″ GM 4.11 Ratio R&P SG GM7.5-411
7.5″ & 7.625″ GM 4.11 Ratio R&P THICK SG GM7.5-411T
7.5″ & 7.625″ GM 4.56 Ratio R&P SG GM7.5-456
7.75″ Borg Warner Sierra Gear & Axle Part #
7.75″ GM 9 Bolt Borg Warner 3.70 Ratio R&P (NOISY) SG GM7.75-373
8″ GTO Sierra Gear & Axle Part #
8″ GTO 3.70 Ratio R&P SG GTO-370
8″ GTO 3.90 Ratio R&P SG GTO-390
8″ GTO 4.11 Ratio R&P SG GTO-411
8.2″ Buick Oldsmobile Pontiac (B.O.P) Sierra Gear & Axle Part #
8.2″ Buick Pontiac 3.36 Ratio R&P SG BP8.2-336
8.2″ Buick Pontiac 3.55 Ratio R&P SG BP8.2-355
8.2″ Buick Pontiac 3.73 Ratio R&P SG BP8.2-373
8.2″ Buick Pontiac 3.90 Ratio R&P SG BP8.2-390
8.2″ Buick Pontiac 4.11 Ratio R&P SG BP8.2-411
8.2″ GM Sierra Gear & Axle Part #
8.2″ GM 3.08 Ratio R&P SG GM8.2-308
8.2″ GM 3.36 Ratio R&P SG GM8.2-336
8.2″ GM 3.36 Ratio Premium R&P SGPGM8.2-336
8.2″ GM 3.55 Ratio R&P SG GM8.2-355
8.2″ GM 3.55 Ratio Premium R&P SGPGM8.2-355
8.2″ GM 3.73 Ratio R&P SG GM8.2-373
8.2″ GM 3.73 Ratio Premium R&P SGPGM8.2-373
8.2″ GM 3.90 Ratio R&P SG GM8.2-390
8.2″ GM 3.90 Ratio Premium R&P SGPGM8.2-390
8.2″ GM 4.11 Ratio R&P SG GM8.2-411
8.2″ GM 4.11 Ratio Premium R&P SGPGM8.2-411
8.2″ GM 4.56 Ratio R&P SG GM8.2-456
8.2″ GM 4.56 Ratio Premium R&P SGPGM8.2-456
8.25″ GM IFS Front Sierra Gear & Axle Part #
8.25″ GM IFS Front 3.42 Ratio R&P SG GM8.25-342R
8.25″ GM IFS Front 3.73 Ratio R&P SG GM8.25-373R
8.25″ GM IFS Front 4.11 Ratio R&P SG GM8.25-411R
8.25″ GM IFS Front 4.56 Ratio R&P SG GM8.25-456R
8.25″ GM IFS Front 4.88 Ratio R&P SG GM8.25-488R
8.25″ GM IFS Front 5.13 Ratio R&P SG GM8.25-513R
8.5″/ 8.625″ GM Sierra Gear & Axle Part #
8.5″ GM 2.73 Ratio R&P SG GM8.5-273
8.5″ GM 3.08 Ratio R&P SG GM8.5-308
8.5″ GM 3.23 Ratio R&P SG GM8.5-323
8.5″ GM 3.42 Ratio R&P SG GM8.5-342
8.5″ GM 3.42 Ratio R&P SGPGM8.5-342
8.5″ GM 3.73 Ratio R&P SG GM8.5-373
8.5″ GM 3.73 Ratio R&P SGPGM8.5-373
8.5″ GM 3.90 Ratio R&P SG GM8.5-390
8.5″ GM 4.11 Ratio R&P SG GM8.5-411
8.5″ GM 4.11 Ratio R&P SGPGM8.5-411
8.5″ GM 4.30 Ratio R&P SG GM8.5-430
8.5″ GM 4.56 Ratio R&P SG GM8.5-456
8.5″ GM 4.56 Ratio R&P SGPGM8.5-456
8.5″ GM 4.88 Ratio R&P SG GM8.5-488
8.5″ GM 4.88 Ratio R&P SGPGM8.5-488
8.5″ GM 5.13 Ratio R&P SG GM8.5-513
8.5″ GM 5.38 Ratio R&P SG GM8.5-538
8.5″ GM 5.57 Ratio R&P SG GM8.5-557
8.5″ Pontiac G8 3.27 Ratio R&P SG G8-327
8.5″ Pontiac G8 3.45 Ratio R&P SG G8-345
8.5″ Pontiac G8 3.70 Ratio R&P SG G8-370
8.5″ Pontiac G8 3.90 Ratio R&P SG G8-390
8.5″ Pontiac G8 4.11 Ratio R&P SG G8-411
8.6″ Camaro 3.90 Ratio R&P – ’10 & Up SG GM8.6-390C
8.6″ Camaro 4.11 Ratio R&P – ’10 & Up SG GM8.6-411C
8.875″ GM 12 Bolt Passenger Sierra Gear & Axle Part #
GM 12 Bolt Passenger 3.08 Ratio R&P SG GM12P-308
GM 12 Bolt Passenger 3.42 Ratio R&P SG GM12P-342
GM 12 Bolt Passenger 3.55 Ratio R&P SG GM12P-355
GM 12 Bolt Passenger 3.73 Ratio R&P SG GM12P-373
GM 12 Bolt Passenger 3.73 Ratio R&P THIN SG GM12P-373-
GM 12 Bolt Passenger 3.90 Ratio R&P SG GM12P-390
GM 12 Bolt Passenger 4.11 Ratio R&P SG GM12P-411
GM 12 Bolt Passenger 4.11 Ratio R&P THICK SG GM12P-411T
GM 12 Bolt Passenger 4.30 Ratio R&P SG GM12P-430
GM 12 Bolt Passenger 4.56 Ratio R&P SG GM12P-456
GM 12 Bolt Passenger 4.56 Ratio Pro R&P SG GM12P-456P
GM 12 Bolt Passenger 4.88 Ratio R&P SG GM12P-488
GM 12 Bolt Passenger 5.14 Ratio R&P SG GM12P-514
GM 12 Bolt Passenger 5.14 Ratio Pro R&P SG GM12P-514P
8.875″ GM 12 Bolt Truck Sierra Gear & Axle Part #
GM 12 Bolt Truck 3.08 Ratio R&P SG GM12T-308
GM 12 Bolt Truck 3.42 Ratio R&P SG GM12T-342
GM 12 Bolt Truck 3.73 Ratio R&P SG GM12T-373
GM 12 Bolt Truck 3.73 Ratio R&P THICK SG GM12T-373T
GM 12 Bolt Truck 4.11 Ratio R&P SG GM12T-411
GM 12 Bolt Truck 4.11 Ratio R&P THICK SG GM12T-411T
GM 12 Bolt Truck 4.56 Ratio R&P SG GM12T-456
GM 12 Bolt Truck 4.56 Ratio R&P THICK SG GM12T-456T
9.25″ GM IFS Front Sierra Gear & Axle Part #
9.25″ GM IFS Front 4.11 Ratio R&P SG GM9.25-411R
9.25″ GM IFS Front 4.56 Ratio R&P SG GM9.25-456R
9.25″ GM IFS Front 4.88 Ratio R&P SG GM9.25-488R
9.25″ GM IFS Front 5.13 Ratio R&P SG GM9.25-513R
9.25″ GM IFS Front 5.38 Ratio R&P SG GM9.25-538R
9.5″ GM 14-Bolt Sierra Gear & Axle Part #
9.5″ GM 3.42 Ratio R&P SG GM9.5-342
9.5″ GM 3.73 Ratio R&P SG GM9.5-373
9.5″ GM 4.11 Ratio R&P SG GM9.5-411
9.5″ GM 4.56 Ratio R&P SG GM9.5-456
9.5″ GM 4.88 Ratio R&P SG GM9.5-488
9.5″ GM 5.13 Ratio R&P SG GM9.5-513
9.5″ GM 5.38 Ratio R&P SG GM9.5-538
10.5″ GM 14 Bolt Truck Sierra Gear & Axle Part #
10.5″ GM 14 Bolt Truck 3.21 Ratio R&P SG GM10.5-321
10.5″ GM 14 Bolt Truck 3.42 Ratio R&P SG GM10.5-342
10.5″ GM 14 Bolt Truck 3.73 Ratio R&P SG GM10.5-373
10.5″ GM 14 Bolt Truck 4.11 Ratio R&P SG GM10.5-411
10.5″ GM 14 Bolt Truck 4.56 Ratio R&P SG GM10.5-456
10.5″ GM 14 Bolt Truck 4.56 Ratio R&P THICK SG GM10.5-456T
10.5″ GM 14 Bolt Truck 4.88 Ratio R&P THICK SG GM10.5-488T
10.5″ GM 14 Bolt Truck 5.13 Ratio R&P THICK SG GM10.5-513T
10.5″ GM 14 Bolt Truck 5.38 Ratio R&P THICK SG GM10.5-538T
11.5″ GM Sierra Gear & Axle Part #
11.5″ GM 3.42 Ratio R&P SG GM11.5-342
11.5″ GM 3.73 Ratio R&P SG GM11.5-373
11.5″ GM 4.11 Ratio R&P SG GM11.5-411
11.5″ GM 4.56 Ratio R&P SG GM11.5-456
11.5″ GM 4.88 Ratio R&P SG GM11.5-488
11.5″ GM 5.13 Ratio R&P SG GM11.5-513
11.5″ GM 5.38 Ratio R&P SG GM11.5-538
11.8″ GM ’14 & Up RAM 3500 w/6.7 Diesel Sierra Gear & Axle Part #
11.8″ GM 3.42 Ratio R&P SG GM11.8-342
11.8″ GM 3.73 Ratio R&P SG GM11.8-373
11.8″ GM 4.11 Ratio R&P SG GM11.8-411
11.8″ GM 4.30 Ratio R&P SG GM11.8-430
11.8″ GM 4.56 Ratio R&P SG GM11.8-456
11.8″ GM 4.88 Ratio R&P SG GM11.8-488
11.8″ GM 5.13 Ratio R&P SG GM11.8-513
11.8″ GM 5.38 Ratio R&P SG GM11.8-538

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Gear Calculator

Doing a gear ratio change but not sure what you want? Try our Differential Gear Calculator.