More Information for MOTIVE GEAR GM12A

{Alternate Inventory Numbers: GM12-373A, GM12-456A, GM12-411A}

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MOTIVE GEAR GM12A

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MOTIVE GEAR GM12A Specifications
Cover Bolt Quantity	12
Differential Carrier Break	3.73 Ratio and Higher
Differential Case Design Type	GM 8.875 Truck
Pinion Gear Tooth Quantity	11
Pinion Shaft Diameter	1.438"
Pinion Spline Count	30
Ring & Pinion Gear Ratio	3.73
Ring Gear Bolt Quantity	12
Ring Gear Diameter	8.875"
Ring Gear Material	8620 Steel
Ring Gear Rotation	Standard
Ring Gear Tooth Quantity	41

A-Line

Features:

Engineered to meet or exceed original equipment manufacturer's specifications
Computer controlled production and double-lappiong result in a strong, quiet and dependable ring & pinion

Differential Identification Guide

To order the correct ring & pinion, it's crucial to know the differential type and gear ratio on your vehicle.

First, determine your Differential Type.
Next, determine the gear ratio on your vehicle using one of the following methods:
- Count The Teeth: Divide the number of teeth on the ring gear (big gear) by the number of teeth on the pinion gear (small gear). If you have 37 teeth on your ring gear and 12 teeth on your pinion gear, you have a 3.08 Gear Ratio (37 � 12 = 3.08).
- Verify Through A Dealer: Verify the ratio using your VIN number. This will only be accurate if the differential has not been previously modified.

Additional Resources

Attention California Customers - Cancer and Reproductive Harm - www.P65Warnings.ca.gov

Warranty Information:
1 Year or 50,000 Miles