Ring and Pinion Gear Sets | GM

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

GM Differential Application Chart:GM Differential Application Chart:

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 3.70 Ratio R&P SG GM55P-370
’55 GM Passenger 4.11 Ratio R&P THICK SG GM55P-411T
’55 GM Truck Sierra Gear & Axle Part #
’55 GM Truck 3.38 Ratio R&P SG GM55T-338
’55 GM Truck 3.90 Ratio R&P **DRILL REQ** SG GM55T-390
GM Corvette Sierra Gear & Axle Part #
Getrag C5 Corvette 3.42 Ratio R&P 97-05 SG GMVET-342GR
Corvette 3.55 Ratio R&P 63-79 SG GMVET-355
Corvette 3.73 Ratio R&P 63-79 SG GMVET-373
Getrag C5 Corvette 3.73 Ratio R&P 97-05 SG GMVET-373GR
Getrag C5 Corvette 3.90 Ratio R&P 97-05 SG GMVET-390GR
Getrag C5 Corvette 3.90 Ratio R&P 97-05 THICK SG GMVET-390GRT
Getrag C5 Corvette 4.11 Ratio R&P 97-05 SG GMVET-411GR
Getrag C5 Corvette 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 GM7.25-411
7.25″ GM IFS Front 4.56 Ratio R&P SG GM7.25-456
7.5″ GM Sierra Gear & Axle Part #
7.5″ GM 2.73 Ratio R&P SG GM7.5-273
7.5″ GM 3.08 Ratio R&P SG GM7.5-308
7.5″ GM 3.23 Ratio R&P SG GM7.5-323
7.5″ GM 3.42 Ratio R&P SG GM7.5-342
7.5″ GM 3.42 Ratio R&P THICK SG GM7.5-342T
7.5″ GM 3.73 Ratio R&P SG GM7.5-373
7.5″ GM 3.73 Ratio R&P THICK SG GM7.5-373T
7.5″ GM 3.90 Ratio R&P SG GM7.5-390
7.5″ GM 4.10 Ratio R&P SG GM7.5-411
7.5″ GM 4.10 Ratio R&P THICK SG GM7.5-411T
7.5″ 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
8.2″ Buick Pontiac 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 3.55 Ratio R&P SG GM8.2-355
8.2″ GM 3.73 Ratio R&P SG GM8.2-373
8.2″ GM 3.90 Ratio R&P SG GM8.2-390
8.2″ GM 4.11 Ratio R&P SG GM8.2-411
8.2″ GM 4.56 Ratio R&P SG GM8.2-456
8.25″ GM IFS Front Sierra Gear & Axle Part #
8.25″ GM IFS Front 3.42 Ratio R&P SG GM8.25-342
8.25″ GM IFS Front 3.73 Ratio R&P SG GM8.25-373
8.25″ GM IFS Front 4.11 Ratio R&P SG GM8.25-411
8.25″ GM IFS Front 4.30 Ratio R&P SG GM8.25-430
8.25″ GM IFS Front 4.56 Ratio R&P SG GM8.25-456
8.25″ GM IFS Front 4.88 Ratio R&P SG GM8.25-488
8.25″ GM IFS Front 5.13 Ratio R&P SG GM8.25-513
8.5″ 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 3.42 Ratio R&P SG GM8.5-342
8.5″ GM 3.73 Ratio R&P SG GM8.5-373
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 4.30 Ratio R&P SG GM8.5-430
8.5″ GM 4.56 Ratio R&P SG GM8.5-456
8.5″ GM 4.88 Ratio R&P SG GM8.5-488
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
8.875″ GM 12 Bolt Passenger Sierra Gear & Axle Part #
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 THIN SG GM12P-390-
GM 12 Bolt Passenger 4.11 Ratio R&P SG GM12P-411
GM 12 Bolt Passenger 4.10 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 4.88 Ratio R&P SG GM12P-488
GM 12 Bolt Passenger 5.14 Ratio R&P SG GM12P-514
8.875″ GM 12 Bolt Truck Sierra Gear & Axle Part #
GM 12 Bolt Passenger 3.08 Ratio R&P SG GM12T-308
GM 12 Bolt Passenger 3.42 Ratio R&P SG GM12T-342
GM 12 Bolt Passenger 3.55 Ratio R&P SG GM12T-373
GM 12 Bolt Truck 3.73 Ratio R&P THICK SG GM12T-373T
GM 12 Bolt Truck 4.10 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
GM 12 Bolt Truck 4.88 Ratio R&P SG GM12T-488
GM 12 Bolt Truck 4.88 Ratio R&P THICK SG GM12T-488T
9.25″ GM IFS Front Sierra Gear & Axle Part #
9.25″ GM IFS Front 4.10 Ratio R&P SG GM9.25-411
9.25″ GM IFS Front 4.56 Ratio R&P SG GM9.25-456
9.25″ GM IFS Front 4.88 Ratio R&P SG GM9.25-488
9.25″ GM IFS Front 5.13 Ratio R&P SG GM9.25-513
9.25″ GM IFS Front FS 5.38 Ratio R&P SG GM9.25-538
9.5″ GM 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 3.42 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 4.10 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 4.56 Ratio R&P SG GM11.5-456
11.5″ GM 4.88 Ratio R&P SG GM11.5-488