12BC373 EXCEL Ring & Pinion Set fit GM 8.875", 3.73 Ratio – 30 Spline, Standard– Fits GM 8.875" (12-Bolt) Differentials, Requires 3.90+ Carrier, Replaces GM: 742H730C, Richmond, Yukon, Motive Gear
12BC373 EXCEL Ring & Pinion Set fit GM 8.875", 3.73 Ratio – 30 Spline, Standard– Fits GM 8.875" (12-Bolt) Differentials, Requires 3.90+ Carrier, Replaces GM: 742H730C, Richmond, Yukon, Motive Gear
12BC373 EXCEL Ring & Pinion Set fit GM 8.875", 3.73 Ratio – 30 Spline, Standard– Fits GM 8.875" (12-Bolt) Differentials, Requires 3.90+ Carrier, Replaces GM: 742H730C, Richmond, Yukon, Motive Gear
12BC373 EXCEL Ring & Pinion Set fit GM 8.875", 3.73 Ratio – 30 Spline, Standard– Fits GM 8.875" (12-Bolt) Differentials, Requires 3.90+ Carrier, Replaces GM: 742H730C, Richmond, Yukon, Motive Gear
12BC373 EXCEL Ring & Pinion Set fit GM 8.875", 3.73 Ratio – 30 Spline, Standard– Fits GM 8.875" (12-Bolt) Differentials, Requires 3.90+ Carrier, Replaces GM: 742H730C, Richmond, Yukon, Motive Gear
12BC373 EXCEL Ring & Pinion Set fit GM 8.875", 3.73 Ratio – 30 Spline, Standard– Fits GM 8.875" (12-Bolt) Differentials, Requires 3.90+ Carrier, Replaces GM: 742H730C, Richmond, Yukon, Motive Gear
12BC373 EXCEL Ring & Pinion Set fit GM 8.875", 3.73 Ratio – 30 Spline, Standard– Fits GM 8.875" (12-Bolt) Differentials, Requires 3.90+ Carrier, Replaces GM: 742H730C, Richmond, Yukon, Motive Gear
12BC373 EXCEL Ring & Pinion Set fit GM 8.875", 3.73 Ratio – 30 Spline, Standard– Fits GM 8.875" (12-Bolt) Differentials, Requires 3.90+ Carrier, Replaces GM: 742H730C, Richmond, Yukon, Motive Gear
12BC373 EXCEL Ring & Pinion Set fit GM 8.875", 3.73 Ratio – 30 Spline, Standard– Fits GM 8.875" (12-Bolt) Differentials, Requires 3.90+ Carrier, Replaces GM: 742H730C, Richmond, Yukon, Motive Gear
12BC373 EXCEL Ring & Pinion Set fit GM 8.875", 3.73 Ratio – 30 Spline, Standard– Fits GM 8.875" (12-Bolt) Differentials, Requires 3.90+ Carrier, Replaces GM: 742H730C, Richmond, Yukon, Motive Gear

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12BC373 EXCEL Ring & Pinion Set fit GM 8.875", 3.73 Ratio – 30 Spline, Standard– Fits GM 8.875" (12-Bolt) Differentials, Requires 3.90+ Carrier, Replaces GM: 742H730C, Richmond, Yukon, Motive Gear

$225.99 USD

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Brand : Richmond Gear/Motive Gear
EXCEL 12BC373 Ring and Pinion Set fits GM 8.875" differentials with a 3.73 ratio.
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12BC373 EXCEL Ring & Pinion Set fit GM 8.875", 3.73 Ratio – 30 Spline, Standard– Fits GM 8.875" (12-Bolt) Differentials, Requires 3.90+ Carrier, Replaces GM: 742H730C, Richmond, Yukon, Motive Gear
12BC373 EXCEL Ring & Pinion Set fit GM 8.875", 3.73 Ratio – 30 Spline, Standard– Fits GM 8.875" (12-Bolt) Differentials, Requires 3.90+ Carrier, Replaces GM: 742H730C, Richmond, Yukon, Motive Gear
View Detail
Type
Differential Rings & Pinions
Title
12BC373 EXCEL Ring & Pinion Set fit GM 8.875", 3.73 Ratio – 30 Spline, Standard– Fits GM 8.875" (12-Bolt) Differentials, Requires 3.90+ Carrier, Replaces GM: 742H730C, Richmond, Yukon, Motive Gear
Price
$225.99 USD
Vendor
Richmond Gear/Motive Gear
Description
EXCEL from Richmond GM 8.875" Car Ring and Pinion Gear Set - 3.73 Ratio – Designed for durability, strength, and efficiency, this high-performance gear set features premium 8620 steel construction for exceptional strength in demanding applications.The optimized 3.73 gear ratio offers an ideal balance of torque and efficiency for street and performance driving.It is a precision fit for GM 8.875" (12-Bolt) differentials, including a 30-spline pinion gear, 11-tooth pinion gear, and 41-tooth ring gear.This standard rotation thin ring and pinion gear set requires a 3.90 and higher carrier and includes a rear pinion seal to prevent leaks.Designed for smooth, quiet operation.

More about this item : 12BC373 EXCEL Ring & Pinion Set fit GM 8.875", 3.73 Ratio – 30 Spline, Standard– Fits GM 8.875" (12-Bolt) Differentials, Requires 3.90+ Carrier, Replaces GM: 742H730C, Richmond, Yukon, Motive Gear

EXCEL from Richmond GM 8.875" Car Ring and Pinion Gear Set - 3.73 Ratio – Designed for durability, strength, and efficiency, this high-performance gear set features premium 8620 steel construction for exceptional strength in demanding applications.

The optimized 3.73 gear ratio offers an ideal balance of torque and efficiency for street and performance driving.

It is a precision fit for GM 8.875" (12-Bolt) differentials, including a 30-spline pinion gear, 11-tooth pinion gear, and 41-tooth ring gear.

This standard rotation thin ring and pinion gear set requires a 3.90 and higher carrier and includes a rear pinion seal to prevent leaks.

Designed for smooth, quiet operation.

12BC373 EXCEL Ring & Pinion Set fit GM 8.875", 3.73 Ratio – 30 Spline, Standard– Fits GM 8.875" (12-Bolt) Differentials, Requires 3.90+ Carrier, Replaces GM: 742H730C, Richmond, Yukon, Motive Gear
Key Features
  • ✅ Heavy-Duty 8620 Steel – Provides strength and durability under high-load conditions
  • ✅ 30-Spline Pinion Shaft – Offers a precise fit for GM 8.875" (12-Bolt) differentials
  • ✅ Standard Rotation & 12-Bolt Design – Maintains factory driveline reliability and smooth performance
  • ✅ Direct OEM Replacement – Compatible with classic GM vehicles, requiring a 3.90 and higher carrier
  • ✅ 1-Year or 50,000 Miles Warranty – Guaranteed quality and reliability
  • ✅ Includes Rear Pinion Seal – Ensures proper sealing and prevents leaks
Technical Specifications
  • Length : 15.0 lb
  • Width : 11.0 lb
  • Height : 5.63 lb
  • Weight : 13.9 lb
Product Identifiers
  • ASIN B003TQ845A
  • UPC: 698231743621
Shipping Information
  • Ships From : United States
  • Brand : Richmond Gear/Motive Gear

Frequently Asked Questions About : 12BC373 EXCEL Ring & Pinion Set fit GM 8.875", 3.73 Ratio – 30 Spline, Standard– Fits GM 8.875" (12-Bolt) Differentials, Requires 3.90+ Carrier, Replaces GM: 742H730C, Richmond, Yukon, Motive Gear

01 What is the gear ratio of the EXCEL 12BC373 Ring and Pinion Set?

The gear ratio is 3.73.

02 What type of steel is used in the EXCEL 12BC373 Ring and Pinion Set?

It uses heavy-duty 8620 steel.

03 What differentials does the EXCEL 12BC373 Ring and Pinion Set fit?

It fits GM 8.875" (12-Bolt) differentials.

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