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

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MPN: PCE204.1065 UPC: 840136515357
Available Extended Warranty Eligible
US $346.40 US $494.90
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Available: 353


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.


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


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)

Brand Information

Speedmaster has become a leader in its field, built on a long term consistency of being a specialist in aftermarket automotive components. The team has shared all the finest moments in the numerous accolades for its people, its products, and its approach. Speedmaster is also one of the rare companies to produce its own products, where majority items are entirely developed and manufactured in its workshops. The ultimate token of precision, Speedmaster is the world’s only major parts manufacturer to equip cars from Standard replacement to Top Fuel Dragsters.

In 1979, the company was founded with Pete’s Performance, which was a small speed workshop. It began by building engines for customers as a hobby, and it has now grown to include selling, assembling, manufacturing and racing high performance engine parts. Over the years, the company has grown into a worldwide high performance powerhouse. Growing from a one-man bricks-and-mortar business; to now a supply chain in which en

Prop 65 Warning

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

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