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Recommended Parts for RMG-12BT342

Richmond Gear EXCel Ring and Pinion Sets 12BT342 GM 8.875 in. (12-bolt) truck 3.42 Gears

RMG-12BT342

4.75 out of 5 stars ( 9 )

Part Number: RMG-12BT342

Estimated Ship Date: Monday 10/26/2026

$223.99

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Results 1 - 18 of 18

75W140 Royal Purple Max-Gear Synthetic Gear Oil 01301

Gear Oil, Max-Gear, Synthetic, 75W140, Quart, Each

Part Number: RPO-01301

4.94 out of 5 stars ( 31 )

Cannot be shipped Internationally if shipped by air

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Cannot be shipped Internationally if shipped by air

80W90 Richmond Gear GL-5 Gear Oil RICHGL5

Gear Lube, GL-5 Gear Oil, 80w90, Limited Slip, 1 qt., Each

Part Number: RMG-RICHGL5

5.0 out of 5 stars ( 4 )

Cannot be shipped Internationally if shipped by air

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Cannot be shipped Internationally if shipped by air

75W140 Lucas Pure Synthetic Gear Oil 10121-1

75W140 Lucas Pure Synthetic Gear Oil 10121-1

Gear Lube, Synthetic, 75W140, One qt., Each

Part Number: LUC-10121-1

4.83 out of 5 stars ( 48 )

Cannot be shipped Internationally if shipped by air

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Cannot be shipped Internationally if shipped by air

Richmond Gear Complete Ring and Pinion Installation Kits 83-1018-1

Ring and Pinion Installation Kit, GM 8.875 in., Truck 12-Bolt, 30-Spline Pinion, Kit

Part Number: RMG-8310181

3.64 out of 5 stars ( 14 )

Estimated Ship Date: Monday 10/26/2026 if shipped by air

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Estimated Ship Date: Monday 10/26/2026 if shipped by air

Richmond Gear Mega Ring and Pinion Installation Kits 83-1018-M

Ring and Pinion Installation Kit, GM, 8.875 in., Truck, 12-Bolt, Kit

Part Number: RMG-831018M

4.5 out of 5 stars ( 12 )

Estimated Ship Date: Monday 10/26/2026 if shipped by air

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Estimated Ship Date: Monday 10/26/2026 if shipped by air

75W140 Lucas Pure Synthetic Gear Oil 10122-1

Gear Oil, Pure Synthetic, 75W140, Limited Slip Additive, 1 gallon, Each

Part Number: LUC-10122-1

5.0 out of 5 stars ( 17 )

Cannot be shipped Internationally if shipped by air

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Cannot be shipped Internationally if shipped by air

75W140 Lucas Pure Synthetic Gear Oil 10123

Gear Oil, Pure Synthetic, 75W140, Limited Slip Additive, 5 gallons, Each

Part Number: LUC-10123

Not Yet Reviewed

Cannot be shipped Internationally if shipped by air

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Cannot be shipped Internationally if shipped by air

Ratech Complete Ring and Pinion Installation Kits 316K

Ring and Pinion Installation Kit, GM, 8.875 in., Truck, 12-Bolt, Kit

Part Number: RAT-316K

4.5 out of 5 stars ( 2 )

Estimated Ship Date: Monday 10/26/2026 if shipped by air

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Estimated Ship Date: Monday 10/26/2026 if shipped by air

Richmond Gear Ring and Pinion Installation DVDs VIDEO-CD

DVD, Ring and Pinion Installation, Each

Part Number: RMG-VIDEO-CD

3.25 out of 5 stars ( 8 )

Estimated Ship Date: Monday 10/26/2026 if shipped by air

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Estimated Ship Date: Monday 10/26/2026 if shipped by air

Ratech Pinion Depth Setting Tools 10010

Pinion Depth Setting Tool, GM, 12-bolt Truck, Each

Part Number: RAT-10010

3.82 out of 5 stars ( 11 )

Estimated Ship Date: Monday 10/26/2026 if shipped by air

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Estimated Ship Date: Monday 10/26/2026 if shipped by air

Fel-Pro Differential Cover Gaskets RDS 13391

Housing Cover Gasket;

Part Number: FEL-RDS13391

4.91 out of 5 stars ( 11 )

Estimated Ship Date: Monday 10/26/2026 if shipped by air

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Estimated Ship Date: Monday 10/26/2026 if shipped by air

Summit Racing™ Master Ring and Pinion Installation Kits SUM-G7922K

Installation Kit, Ring and Pinion, Basic, GM, 8.875 in., Kit

Part Number: SUM-G7922K

5.0 out of 5 stars ( 5 )

Estimated Ship Date: Monday 10/26/2026 if shipped by air

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Estimated Ship Date: Monday 10/26/2026 if shipped by air

Summit Racing™ Ring and Pinion Marking Compound SUM-730001

Marking Compound, Ring and Pinion, Beige, Each

Part Number: SUM-730001

4.77 out of 5 stars ( 13 )

Cannot be shipped Internationally if shipped by air

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Cannot be shipped Internationally if shipped by air

75W140 Lucas Pure Synthetic Gear Oil 10121

Gear Lube, Synthetic, 75W140, One qt., Set of 12

Part Number: LUC-10121

5.0 out of 5 stars ( 1 )

Cannot be shipped Internationally if shipped by air

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Cannot be shipped Internationally if shipped by air

75W140 Maxima Oil Pro Gear Oil 49-45901

Gear Oil, Pro Gear, 75W140, Quart, Each

Part Number: MAO-49-45901

Not Yet Reviewed

Cannot be shipped Internationally if shipped by air

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Cannot be shipped Internationally if shipped by air

Richmond Gear Ring and Pinion Installation Half Kits 83-1018-B

Ring and Pinion Installation Kit, GM, 12-Bolt, 8.875 in. Diameter Ring Gear, 30-Spline Pinion, Kit

Part Number: RMG-831018B

4.0 out of 5 stars ( 1 )

Estimated Ship Date: Nov 9, 2026 if ordered today

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Estimated Ship Date: Nov 9, 2026 if ordered today

75W140 Royal Purple Max-Gear Synthetic Gear Oil 05301

Gear Lube, Max-Gear Synthetic Gear Oil, 75W140, 5 Gallons, Each

Part Number: RPO-5301

Not Yet Reviewed

Cannot be shipped Internationally if ordered today

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Cannot be shipped Internationally if ordered today

75W140 Motul Gear Box Oil 105779

Gear Lube, Gear Box Oil, Synthetic, 75W140, 1 Liter, Each

Part Number: MTL-105779

5.0 out of 5 stars ( 4 )

Cannot be shipped Internationally if shipped by air

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Cannot be shipped Internationally if shipped by air

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