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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 PassengerSierra Gear & Axle Part #
’55 GM Passenger 3.08 Ratio R&PSG GM55P-308
’55 GM Passenger 3.55 Ratio R&PSG GM55P-355
’55 GM Passenger 3.55 Ratio Premium R&PSGPGM55P-355
’55 GM Passenger 3.70 Ratio R&PSG GM55P-370
’55 GM Passenger 3.70 Ratio Premium R&PSGPGM55P-370
’55 GM TruckSierra Gear & Axle Part #
’55 GM Truck 3.38 Ratio R&PSG GM55T-338
GM CorvetteSierra Gear & Axle Part #
Corvette 3.55 Ratio R&P ’63-’79SG GMVET-355
Corvette 3.73 Ratio R&P ’63-‘ 79SG GMVET-373
C5 Corvette Getrag 3.42 Ratio R&P ’97-’05SG GMVET-342GR
C5 Corvette Getrag 3.73 Ratio R&P ’97-’05SG GMVET-373GR
C5 Corvette Getrag 3.90 Ratio R&P ’97-’05SG GMVET-390GR
C5 Corvette Getrag 3.90 Ratio R&P ’97-’05 THICKSG GMVET-390GRT
C5 Corvette Getrag 4.11 Ratio R&P ’97-’05SG GMVET-411GR
C5 Corvette Getrag 4.11 Ratio R&P ’97-’05 THICKSG GMVET-411GRT
7.25″ GM IFS FrontSierra Gear & Axle Part #
7.25″ GM IFS Front 4.11 Ratio R&PSG GM7.25-411R
7.25″ GM IFS Front 4.56 Ratio R&PSG GM7.25-456R
7.5″ & 7.625″ GMSierra Gear & Axle Part #
7.5″ & 7.625″ GM 2.73 Ratio R&PSG GM7.5-273
7.5″ & 7.625″ GM 3.08 Ratio R&PSG GM7.5-308
7.5″ & 7.625″ GM 3.23 Ratio R&PSG GM7.5-323
7.5″ & 7.625″ GM 3.42 Ratio R&PSG GM7.5-342
7.5″ & 7.625″ GM 3.42 Ratio R&P THICKSG GM7.5-342T
7.5″ & 7.625″ GM 3.73 Ratio R&PSG GM7.5-373
7.5″ & 7.625″ GM 3.73 Ratio R&P THICKSG GM7.5-373T
7.5″ & 7.625″ GM 3.90 Ratio R&PSG GM7.5-390
7.5″ & 7.625″ GM 4.11 Ratio R&PSG GM7.5-411
7.5″ & 7.625″ GM 4.11 Ratio R&P THICKSG GM7.5-411T
7.5″ & 7.625″ GM 4.56 Ratio R&PSG GM7.5-456
7.75″ Borg WarnerSierra Gear & Axle Part #
7.75″ GM 9 Bolt Borg Warner 3.70 Ratio R&P (NOISY)SG GM7.75-373
8″ GTOSierra Gear & Axle Part #
8″ GTO 3.70 Ratio R&PSG GTO-370
8″ GTO 3.90 Ratio R&PSG GTO-390
8″ GTO 4.11 Ratio R&PSG GTO-411
8.2″ Buick Oldsmobile Pontiac (B.O.P)Sierra Gear & Axle Part #
8.2″ Buick Pontiac 3.36 Ratio R&PSG BP8.2-336
8.2″ Buick Pontiac 3.55 Ratio R&PSG BP8.2-355
8.2″ Buick Pontiac 3.73 Ratio R&PSG BP8.2-373
8.2″ Buick Pontiac 3.90 Ratio R&PSG BP8.2-390
8.2″ Buick Pontiac 4.11 Ratio R&PSG BP8.2-411
8.2″ GMSierra Gear & Axle Part #
8.2″ GM 3.08 Ratio R&PSG GM8.2-308
8.2″ GM 3.36 Ratio R&PSG GM8.2-336
8.2″ GM 3.36 Ratio Premium R&PSGPGM8.2-336
8.2″ GM 3.55 Ratio R&PSG GM8.2-355
8.2″ GM 3.55 Ratio Premium R&PSGPGM8.2-355
8.2″ GM 3.73 Ratio R&PSG GM8.2-373
8.2″ GM 3.73 Ratio Premium R&PSGPGM8.2-373
8.2″ GM 3.90 Ratio R&PSG GM8.2-390
8.2″ GM 3.90 Ratio Premium R&PSGPGM8.2-390
8.2″ GM 4.11 Ratio R&PSG GM8.2-411
8.2″ GM 4.11 Ratio Premium R&PSGPGM8.2-411
8.2″ GM 4.56 Ratio R&PSG GM8.2-456
8.2″ GM 4.56 Ratio Premium R&PSGPGM8.2-456
8.25″ GM IFS FrontSierra Gear & Axle Part #
8.25″ GM IFS Front 3.42 Ratio R&PSG GM8.25-342R
8.25″ GM IFS Front 3.73 Ratio R&PSG GM8.25-373R
8.25″ GM IFS Front 4.11 Ratio R&PSG GM8.25-411R
8.25″ GM IFS Front 4.56 Ratio R&PSG GM8.25-456R
8.25″ GM IFS Front 4.88 Ratio R&PSG GM8.25-488R
8.25″ GM IFS Front 5.13 Ratio R&PSG GM8.25-513R
8.5″/ 8.625″ GMSierra Gear & Axle Part #
8.5″ GM 2.73 Ratio R&PSG GM8.5-273
8.5″ GM 3.08 Ratio R&PSG GM8.5-308
8.5″ GM 3.23 Ratio R&PSG GM8.5-323
8.5″ GM 3.42 Ratio R&PSG GM8.5-342
8.5″ GM 3.42 Ratio R&PSGPGM8.5-342
8.5″ GM 3.73 Ratio R&PSG GM8.5-373
8.5″ GM 3.73 Ratio R&PSGPGM8.5-373
8.5″ GM 3.90 Ratio R&PSG GM8.5-390
8.5″ GM 4.11 Ratio R&PSG GM8.5-411
8.5″ GM 4.11 Ratio R&PSGPGM8.5-411
8.5″ GM 4.30 Ratio R&PSG GM8.5-430
8.5″ GM 4.56 Ratio R&PSG GM8.5-456
8.5″ GM 4.56 Ratio R&PSGPGM8.5-456
8.5″ GM 4.88 Ratio R&PSG GM8.5-488
8.5″ GM 4.88 Ratio R&PSGPGM8.5-488
8.5″ GM 5.13 Ratio R&PSG GM8.5-513
8.5″ GM 5.38 Ratio R&PSG GM8.5-538
8.5″ GM 5.57 Ratio R&PSG GM8.5-557
8.5″ Pontiac G8 3.27 Ratio R&PSG G8-327
8.5″ Pontiac G8 3.45 Ratio R&PSG G8-345
8.5″ Pontiac G8 3.70 Ratio R&PSG G8-370
8.5″ Pontiac G8 3.90 Ratio R&PSG G8-390
8.5″ Pontiac G8 4.11 Ratio R&PSG G8-411
8.6″ Camaro 3.90 Ratio R&P – ’10 & UpSG GM8.6-390C
8.6″ Camaro 4.11 Ratio R&P – ’10 & UpSG GM8.6-411C
8.875″ GM 12 Bolt PassengerSierra Gear & Axle Part #
GM 12 Bolt Passenger 3.08 Ratio R&PSG GM12P-308
GM 12 Bolt Passenger 3.42 Ratio R&PSG GM12P-342
GM 12 Bolt Passenger 3.55 Ratio R&PSG GM12P-355
GM 12 Bolt Passenger 3.73 Ratio R&PSG GM12P-373
GM 12 Bolt Passenger 3.73 Ratio R&P THINSG GM12P-373-
GM 12 Bolt Passenger 3.90 Ratio R&PSG GM12P-390
GM 12 Bolt Passenger 4.11 Ratio R&PSG GM12P-411
GM 12 Bolt Passenger 4.11 Ratio R&P THICKSG GM12P-411T
GM 12 Bolt Passenger 4.30 Ratio R&PSG GM12P-430
GM 12 Bolt Passenger 4.56 Ratio R&PSG GM12P-456
GM 12 Bolt Passenger 4.56 Ratio Pro R&PSG GM12P-456P
GM 12 Bolt Passenger 4.88 Ratio R&PSG GM12P-488
GM 12 Bolt Passenger 5.14 Ratio R&PSG GM12P-514
GM 12 Bolt Passenger 5.14 Ratio Pro R&PSG GM12P-514P
8.875″ GM 12 Bolt TruckSierra Gear & Axle Part #
GM 12 Bolt Truck 3.08 Ratio R&PSG GM12T-308
GM 12 Bolt Truck 3.42 Ratio R&PSG GM12T-342
GM 12 Bolt Truck 3.73 Ratio R&PSG GM12T-373
GM 12 Bolt Truck 3.73 Ratio R&P THICKSG GM12T-373T
GM 12 Bolt Truck 4.11 Ratio R&PSG GM12T-411
GM 12 Bolt Truck 4.11 Ratio R&P THICKSG GM12T-411T
GM 12 Bolt Truck 4.56 Ratio R&PSG GM12T-456
GM 12 Bolt Truck 4.56 Ratio R&P THICKSG GM12T-456T
9.25″ GM IFS FrontSierra Gear & Axle Part #
9.25″ GM IFS Front 4.11 Ratio R&PSG GM9.25-411R
9.25″ GM IFS Front 4.56 Ratio R&PSG GM9.25-456R
9.25″ GM IFS Front 4.88 Ratio R&PSG GM9.25-488R
9.25″ GM IFS Front 5.13 Ratio R&PSG GM9.25-513R
9.25″ GM IFS Front 5.38 Ratio R&PSG GM9.25-538R
9.5″ GM 14-BoltSierra Gear & Axle Part #
9.5″ GM 3.42 Ratio R&PSG GM9.5-342
9.5″ GM 3.73 Ratio R&PSG GM9.5-373
9.5″ GM 4.11 Ratio R&PSG GM9.5-411
9.5″ GM 4.56 Ratio R&PSG GM9.5-456
9.5″ GM 4.88 Ratio R&PSG GM9.5-488
9.5″ GM 5.13 Ratio R&PSG GM9.5-513
9.5″ GM 5.38 Ratio R&PSG GM9.5-538
10.5″ GM 14 Bolt TruckSierra Gear & Axle Part #
10.5″ GM 14 Bolt Truck 3.21 Ratio R&PSG GM10.5-321
10.5″ GM 14 Bolt Truck 3.42 Ratio R&PSG GM10.5-342
10.5″ GM 14 Bolt Truck 3.73 Ratio R&PSG GM10.5-373
10.5″ GM 14 Bolt Truck 4.11 Ratio R&PSG GM10.5-411
10.5″ GM 14 Bolt Truck 4.56 Ratio R&PSG GM10.5-456
10.5″ GM 14 Bolt Truck 4.56 Ratio R&P THICKSG GM10.5-456T
10.5″ GM 14 Bolt Truck 4.88 Ratio R&P THICKSG GM10.5-488T
10.5″ GM 14 Bolt Truck 5.13 Ratio R&P THICKSG GM10.5-513T
10.5″ GM 14 Bolt Truck 5.38 Ratio R&P THICKSG GM10.5-538T
11.5″ GMSierra Gear & Axle Part #
11.5″ GM 3.42 Ratio R&PSG GM11.5-342
11.5″ GM 3.73 Ratio R&PSG GM11.5-373
11.5″ GM 4.11 Ratio R&PSG GM11.5-411
11.5″ GM 4.56 Ratio R&PSG GM11.5-456
11.5″ GM 4.88 Ratio R&PSG GM11.5-488
11.5″ GM 5.13 Ratio R&PSG GM11.5-513
11.5″ GM 5.38 Ratio R&PSG GM11.5-538
11.8″ GM ’14 & Up RAM 3500 w/6.7 DieselSierra Gear & Axle Part #
11.8″ GM 3.42 Ratio R&PSG GM11.8-342
11.8″ GM 3.73 Ratio R&PSG GM11.8-373
11.8″ GM 4.11 Ratio R&PSG GM11.8-411
11.8″ GM 4.30 Ratio R&PSG GM11.8-430
11.8″ GM 4.56 Ratio R&PSG GM11.8-456
11.8″ GM 4.88 Ratio R&PSG GM11.8-488
11.8″ GM 5.13 Ratio R&PSG GM11.8-513
11.8″ GM 5.38 Ratio R&PSG GM11.8-538

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Find the application and ratio you need? Locate a Sierra Gear & Axle Distributor near you.

Gear Calculator

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