Speedmaster®

GM 8.5" 8.6" 10 Bolt 30 Spline Clutch Plate Type LSD Limited Slip Differential

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MPN PCE204.1065 UPC840136515357

Product Information

Overview

The GM 8.5" 10 Bolt axle, also known as the GM 8.6" axle or GM 10-Bolt, is available in many front and rear axle applications including both solid axle and IFS / IRS configurations. While the GM 8.5" axle features an 8.5" diameter ring gear and the GM 8.6" axle uses a slightly larger 8.6" diameter ring gear, almost everything within the axles is completely interchangeable.

Specs

Brand:Speedmaster
Part Number:PCE204.1065
Part Type:Differential Carrier
Aftermarket Carrier Style:Limited slip
Cover Bolts:10
Axle Shaft Spline Quantity:30
Manufacturer of Axle:GM / Speedmaster
Carrier Material:Steel
Quantity:Sold individually.

Description

For 8.5"
The factory 8.5" carrier when installed in a factory 8.5" axle uses Timken bearing part # LM501349 and race part # LM501314.The inner diameter of the bearing is about 1.625" and the outer diameter of the race is about 2.890".

For 8.6"
The factory 8.6" carrier when installed in a factory 8.6" axle uses Timken bearing part # LM603049 and race part # LM603012.The inner diameter of the bearing is about 1.780" and the outer diameter of the race is about 3.060".

Special Case:
When retrofitting an 8.6" carrier (or a locker or a spool or any device that replaces the carrier) into an 8.5" axle, it uses Timken bearing part # LM102949 and race part # LM102911. Essentially, it's an ID of 1.780" (bearing) and an OD of 2.890" (race)

Warranty Information

12-Month Limited Worldwide Warranty

Prop 65 Warning

This product may contain chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm.

Installation Guide

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This AI-generated guide is for general reference only and does not constitute official Speedmaster product documentation. Always verify fitment, torque specifications, and safety requirements before installation.