Home / Shop / Richmond Gear Pro Ring and Pinion Sets 79-0072-1 GM 8.875 in. (12-bolt) passenger car 4.56 Gears Gear, Pinion, 4.56:1 Ratio, GM, 12-Bolt Car, 4 Series, Set

Richmond Gear Pro Ring and Pinion Sets 79-0072-1 GM 8.875 in. (12-bolt) passenger car 4.56 Gears Gear, Pinion, 4.56:1 Ratio, GM, 12-Bolt Car, 4 Series, Set

SKU: RMG79-0072-1

Ring and Pinion Gears

Richmond Gear

Richmond Gear Pro Ring and Pinion Sets 79-0072-1 GM 8.875 in. (12-bolt) passenger car 4.56 Gears Gear, Pinion, 4.56:1 Ratio, GM, 12-Bolt Car, 4 Series, Set

SKU: RMG79-0072-1

Ring and Pinion Gears

Sale ends in Calculating... Sat 24 Oct, 1:19 am AEST

LOW STOCK! Est Ship 4-7 days. HURRY! LOW STOCK. This item is in limited stock at one of our distribution centres. The ETA is the approximate time required to prepare your order for dispatch.

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Description

Richmond Gear Pro Gear ring and pinion sets take it a step further. The gear sets are designed for race use only where hard launches and severe heat cycling occurs. They're made from a softer, more malleable 9310 steel alloy to be more resistant to breakage under harsh racing conditions. These gears feature an outstanding rotating weight loss of up to 6 pounds, ground pinion threads for trouble-free installation, and a special heat treatment for improved strength.

Part Type

4.56 12 Bolt GM Pass

Data: v4.2 - Upd: 2026-10-23 00:16:28

Specifications

Product Attributes - Brand: Richmond Gear
Product Attributes - Manufacturer's Part Number: 79-0072-1
Product Attributes - Part Type: Ring and Pinion Gears
Product Attributes - Product Line: Richmond Gear Pro Gear Ring and Pinion Sets
Product Attributes - UPC: 698231679180
Product Attributes - Differential Case Design Type: GM 8.875 in. (12-bolt), passenger car
Product Attributes - Ring and Pinion Ratio: 4.56:1
Product Attributes - Cover Bolts: 12
Product Attributes - Ring Gear Bolts: 12
Product Attributes - Pinion Spline Count: 30
Product Attributes - Carrier Series: 4
Product Attributes - Ring Gear Rotation: Standard
Product Attributes - Ring Gear Teeth: 41
Product Attributes - Pinion Gear Teeth: 9
Product Attributes - Ring Gear Diameter (in.): 8.875 in.
Product Attributes - Pinion Shaft Diameter (in.): 1.625 in.
Product Attributes - Installation Kit Included: No
Product Attributes - Cover Gasket Included: No
Product Attributes - Pinion Shims Included: No
Product Attributes - Carrier Shims Included: No
Product Attributes - Crush Sleeve Included: No
Product Attributes - Pinion Seal Included: No
Product Attributes - Pinion Nut Included: No
Product Attributes - Ring Gear Bolts Included: No
Product Attributes - Head Bearing Included: No
Product Attributes - Tail Bearing Included: No
Product Attributes - Carrier Bearings Included: No
Product Attributes - Axle Seals Included: No
Product Attributes - Axle Bearings Included: No
Product Attributes - Differential Cover Included: No
Product Attributes - Differential Oil Included: No
Product Attributes - Friction Modifier Included: No
Product Attributes - Installation DVD Included: No
Product Attributes - Quantity: Sold as a set.
Product Attributes - Notes: 3.90:1 or numerically higher ratio carrier.

Reference Information

Brand Name/s	Richmond Gear
StreetFX SKU	rmg79-0072-1
SFX Item ID	5501187
Supplier Item Code	5501187
Manufacturer SKU	79-0072-1
Manufacturer UPC	N/A
Alternative References	RIC79-0072-1, 12-Bolt

Compatibility

Application Data

Make	BUICK
Model	CENTURION
Submodel	BASE
Beginning Year	1971
Ending Year	1971
Engine Type	V8
Engine Size	7.5L/455
Engine Family	BUICK V8 GAS
Axle Location	Rear
Liter	7.5
CID	455
CC	7456
Application Notes	Differential Ring and Pinion; For GM 8.875" (12 Bolt); 4.56 Ratio; Pro Gear; Requires a 4.10 and Numerically Higher Ratio Carrier
Region	USA

Make	BUICK
Model	CENTURION
Submodel	BASE
Beginning Year	1971
Ending Year	1971
Engine Type	V8
Engine Size	7.5L/455
Engine Family	BUICK V8 GAS
Axle Location	Rear
Liter	7.5
CID	455
CC	7456
Application Notes	Differential Ring and Pinion; For GM 8.875" (12 Bolt); 4.56 Ratio; Pro Gear; Requires a 4.10 and Numerically Higher Ratio Carrier
Region	USA

Make	BUICK
Model	CENTURION
Submodel	BASE
Beginning Year	1971
Ending Year	1971
Engine Type	V8
Engine Size	7.5L/455
Engine Family	BUICK V8 GAS
Axle Location	Rear
Liter	7.5
CID	455
CC	7456
Application Notes	Differential Ring and Pinion; For GM 8.875" (12 Bolt); 4.56 Ratio; Pro Gear; Requires a 4.10 and Numerically Higher Ratio Carrier
Region	USA

Make	BUICK
Model	CENTURION
Submodel	BASE
Beginning Year	1971
Ending Year	1972
Engine Type	V8
Engine Size	7.5L/455
Engine Family	BUICK V8 GAS
Axle Location	Rear
Liter	7.5
CID	455
CC	7456
Application Notes	Differential Ring and Pinion; For GM 8.875" (12 Bolt); 4.56 Ratio; Pro Gear; Requires a 4.10 and Numerically Higher Ratio Carrier
Engine VIN Code	U
Region	USA

Make	BUICK
Model	CENTURION
Submodel	BASE
Beginning Year	1972
Ending Year	1972
Engine Type	V8
Engine Size	7.5L/455
Engine Family	BUICK V8 GAS
Axle Location	Rear
Liter	7.5
CID	455
CC	7456
Application Notes	Differential Ring and Pinion; For GM 8.875" (12 Bolt); 4.56 Ratio; Pro Gear; Requires a 4.10 and Numerically Higher Ratio Carrier
Engine VIN Code	T
Region	USA

Make	BUICK
Model	CENTURION
Submodel	BASE
Beginning Year	1972
Ending Year	1972
Engine Type	V8
Engine Size	7.5L/455
Engine Family	BUICK V8 GAS
Axle Location	Rear
Liter	7.5
CID	455
CC	7456
Application Notes	Differential Ring and Pinion; For GM 8.875" (12 Bolt); 4.56 Ratio; Pro Gear; Requires a 4.10 and Numerically Higher Ratio Carrier
Engine VIN Code	V
Region	USA

Make	BUICK
Model	CENTURION
Submodel	BASE
Beginning Year	1972
Ending Year	1972
Engine Type	V8
Engine Size	7.5L/455
Engine Family	BUICK V8 GAS
Axle Location	Rear
Liter	7.5
CID	455
CC	7456
Application Notes	Differential Ring and Pinion; For GM 8.875" (12 Bolt); 4.56 Ratio; Pro Gear; Requires a 4.10 and Numerically Higher Ratio Carrier
Engine VIN Code	W
Region	USA

Make	BUICK
Model	ELECTRA
Submodel	225
Beginning Year	1968
Ending Year	1968
Engine Type	V8
Engine Size	7.0L/430
Engine Family	BUICK V8 GAS
Axle Location	Rear
Liter	7.0
CID	430
CC	7047
Application Notes	Differential Ring and Pinion; For GM 8.875" (12 Bolt); 4.56 Ratio; Pro Gear; Requires a 4.10 and Numerically Higher Ratio Carrier
Region	USA

Make	BUICK
Model	ELECTRA
Submodel	225
Beginning Year	1969
Ending Year	1969
Engine Type	V8
Engine Size	7.0L/430
Engine Family	BUICK V8 GAS
Axle Location	Rear
Liter	7.0
CID	430
CC	7047
Application Notes	Differential Ring and Pinion; For GM 8.875" (12 Bolt); 4.56 Ratio; Pro Gear; Requires a 4.10 and Numerically Higher Ratio Carrier
Region	USA

Make	BUICK
Model	ELECTRA
Submodel	225
Beginning Year	1970
Ending Year	1970
Engine Type	V8
Engine Size	7.5L/455
Engine Family	BUICK V8 GAS
Axle Location	Rear
Liter	7.5
CID	455
CC	7456
Application Notes	Differential Ring and Pinion; For GM 8.875" (12 Bolt); 4.56 Ratio; Pro Gear; Requires a 4.10 and Numerically Higher Ratio Carrier
Region	USA

Make	BUICK
Model	ELECTRA
Submodel	225
Beginning Year	1970
Ending Year	1970
Engine Type	V8
Engine Size	7.5L/455
Engine Family	BUICK V8 GAS
Axle Location	Rear
Liter	7.5
CID	455
CC	7456
Application Notes	Differential Ring and Pinion; For GM 8.875" (12 Bolt); 4.56 Ratio; Pro Gear; Requires a 4.10 and Numerically Higher Ratio Carrier
Region	USA

Make	BUICK
Model	ELECTRA
Submodel	225
Beginning Year	1970
Ending Year	1970
Engine Type	V8
Engine Size	7.5L/455
Engine Family	BUICK V8 GAS
Axle Location	Rear
Liter	7.5
CID	455
CC	7456
Application Notes	Differential Ring and Pinion; For GM 8.875" (12 Bolt); 4.56 Ratio; Pro Gear; Requires a 4.10 and Numerically Higher Ratio Carrier
Region	USA

Make	BUICK
Model	ELECTRA
Submodel	225
Beginning Year	1971
Ending Year	1971
Engine Type	V8
Engine Size	7.5L/455
Engine Family	BUICK V8 GAS
Axle Location	Rear
Liter	7.5
CID	455
CC	7456
Application Notes	Differential Ring and Pinion; For GM 8.875" (12 Bolt); 4.56 Ratio; Pro Gear; Requires a 4.10 and Numerically Higher Ratio Carrier
Region	USA

Make	BUICK
Model	ELECTRA
Submodel	225
Beginning Year	1971
Ending Year	1971
Engine Type	V8
Engine Size	7.5L/455
Engine Family	BUICK V8 GAS
Axle Location	Rear
Liter	7.5
CID	455
CC	7456
Application Notes	Differential Ring and Pinion; For GM 8.875" (12 Bolt); 4.56 Ratio; Pro Gear; Requires a 4.10 and Numerically Higher Ratio Carrier
Region	USA

Make	BUICK
Model	ELECTRA
Submodel	225
Beginning Year	1971
Ending Year	1971
Engine Type	V8
Engine Size	7.5L/455
Engine Family	BUICK V8 GAS
Axle Location	Rear
Liter	7.5
CID	455
CC	7456
Application Notes	Differential Ring and Pinion; For GM 8.875" (12 Bolt); 4.56 Ratio; Pro Gear; Requires a 4.10 and Numerically Higher Ratio Carrier
Region	USA

Make	BUICK
Model	ELECTRA
Submodel	225
Beginning Year	1971
Ending Year	1972
Engine Type	V8
Engine Size	7.5L/455
Engine Family	BUICK V8 GAS
Axle Location	Rear
Liter	7.5
CID	455
CC	7456
Application Notes	Differential Ring and Pinion; For GM 8.875" (12 Bolt); 4.56 Ratio; Pro Gear; Requires a 4.10 and Numerically Higher Ratio Carrier
Engine VIN Code	U
Region	USA

Make	BUICK
Model	ELECTRA
Submodel	225
Beginning Year	1972
Ending Year	1972
Engine Type	V8
Engine Size	7.5L/455
Engine Family	BUICK V8 GAS
Axle Location	Rear
Liter	7.5
CID	455
CC	7456
Application Notes	Differential Ring and Pinion; For GM 8.875" (12 Bolt); 4.56 Ratio; Pro Gear; Requires a 4.10 and Numerically Higher Ratio Carrier
Engine VIN Code	T
Region	USA

Make	BUICK
Model	ELECTRA
Submodel	225
Beginning Year	1972
Ending Year	1972
Engine Type	V8
Engine Size	7.5L/455
Engine Family	BUICK V8 GAS
Axle Location	Rear
Liter	7.5
CID	455
CC	7456
Application Notes	Differential Ring and Pinion; For GM 8.875" (12 Bolt); 4.56 Ratio; Pro Gear; Requires a 4.10 and Numerically Higher Ratio Carrier
Engine VIN Code	V
Region	USA

Make	BUICK
Model	ELECTRA
Submodel	225
Beginning Year	1972
Ending Year	1972
Engine Type	V8
Engine Size	7.5L/455
Engine Family	BUICK V8 GAS
Axle Location	Rear
Liter	7.5
CID	455
CC	7456
Application Notes	Differential Ring and Pinion; For GM 8.875" (12 Bolt); 4.56 Ratio; Pro Gear; Requires a 4.10 and Numerically Higher Ratio Carrier
Engine VIN Code	W
Region	USA

Make	BUICK
Model	ELECTRA
Submodel	225 CUSTOM
Beginning Year	1968
Ending Year	1968
Engine Type	V8
Engine Size	7.0L/430
Engine Family	BUICK V8 GAS
Axle Location	Rear
Liter	7.0
CID	430
CC	7047
Application Notes	Differential Ring and Pinion; For GM 8.875" (12 Bolt); 4.56 Ratio; Pro Gear; Requires a 4.10 and Numerically Higher Ratio Carrier
Region	USA

Make	BUICK
Model	ELECTRA
Submodel	225 CUSTOM
Beginning Year	1969
Ending Year	1969
Engine Type	V8
Engine Size	7.0L/430
Engine Family	BUICK V8 GAS
Axle Location	Rear
Liter	7.0
CID	430
CC	7047
Application Notes	Differential Ring and Pinion; For GM 8.875" (12 Bolt); 4.56 Ratio; Pro Gear; Requires a 4.10 and Numerically Higher Ratio Carrier
Region	USA

Make	BUICK
Model	ELECTRA
Submodel	225 CUSTOM
Beginning Year	1970
Ending Year	1970
Engine Type	V8
Engine Size	7.5L/455
Engine Family	BUICK V8 GAS
Axle Location	Rear
Liter	7.5
CID	455
CC	7456
Application Notes	Differential Ring and Pinion; For GM 8.875" (12 Bolt); 4.56 Ratio; Pro Gear; Requires a 4.10 and Numerically Higher Ratio Carrier
Region	USA

Make	BUICK
Model	ELECTRA
Submodel	225 CUSTOM
Beginning Year	1970
Ending Year	1970
Engine Type	V8
Engine Size	7.5L/455
Engine Family	BUICK V8 GAS
Axle Location	Rear
Liter	7.5
CID	455
CC	7456
Application Notes	Differential Ring and Pinion; For GM 8.875" (12 Bolt); 4.56 Ratio; Pro Gear; Requires a 4.10 and Numerically Higher Ratio Carrier
Region	USA

Make	BUICK
Model	ELECTRA
Submodel	225 CUSTOM
Beginning Year	1970
Ending Year	1970
Engine Type	V8
Engine Size	7.5L/455
Engine Family	BUICK V8 GAS
Axle Location	Rear
Liter	7.5
CID	455
CC	7456
Application Notes	Differential Ring and Pinion; For GM 8.875" (12 Bolt); 4.56 Ratio; Pro Gear; Requires a 4.10 and Numerically Higher Ratio Carrier
Region	USA

Make	BUICK
Model	ELECTRA
Submodel	225 CUSTOM
Beginning Year	1971
Ending Year	1971
Engine Type	V8
Engine Size	7.5L/455
Engine Family	BUICK V8 GAS
Axle Location	Rear
Liter	7.5
CID	455
CC	7456
Application Notes	Differential Ring and Pinion; For GM 8.875" (12 Bolt); 4.56 Ratio; Pro Gear; Requires a 4.10 and Numerically Higher Ratio Carrier
Region	USA

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Richmond Gear Pro Ring and Pinion Sets 79-0072-1 GM 8.875 in. (12-bolt) passenger car 4.56 Gears Gear, Pinion, 4.56:1 Ratio, GM, 12-Bolt Car, 4 Series, Set

Richmond Gear Pro Ring and Pinion Sets 79-0072-1 GM 8.875 in. (12-bolt) passenger car 4.56 Gears Gear, Pinion, 4.56:1 Ratio, GM, 12-Bolt Car, 4 Series, Set

Description

Part Type

Specifications

Reference Information

Compatibility

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