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187C148A

DETROIT LOCKER® DIFFERENTIAL; GM 8.5. /8.6IN.; 30 SPLINE; 2.73 AND UP

General specifications

Product Name
Eaton Detroit Locker Differential
Catalog Number
187C148A
Catalog Notes
All Eaton differentials made for General Motors 8.5" and 8.6" axles require special bearings. For axles with small bearing bores (race O.D. or 2.89"), usually found on vehicles prior to 1999, bearing LM102949 and race LM102911 are required. For axles with large bearing bores (race O.D. of 3.06"), usually found on vehicles from 1999-2013, bearing LM603049 and race LM603012 are required.

Product specifications

Ring gear ratio
2.73 & up
Gear spline tooth count
30 EA
Axle shaft diameter
1.31 in
Ring gear size
8.5 in
Differential type
Locking
Vehicle usage
On Road: Drag Racing
On Road: Street and Muscle
Off-Road: Extreme Off-Road
Off-Road: Rock Crawl
Off-Road: Light Trail / Sand Sports
On Road: Circle Track
Off-Road: Work Truck / Towing
On Road: Work Truck / Towing
On Road: Restoration

Differential Product Selector

Model year start Model year end Vehicle make Vehicle type (model) Axle location Axle description Gear ratio Model product notes
1988 2013 General Motors Half-Ton Truck Rear GM 10 bolt C-Clip 2.73 & up
1988 1996 General Motors, Chevrolet, Pontiac, Buick, Oldsmobile Passenger Car Rear GM 10 bolt C-Clip 2.73 & up
1988 1991 General Motors Half-Ton Truck Front GM 10 bolt 2.73 & up
1988 2007 General Motors Three Quarters-Ton Truck Rear GM 10 bolt C-Clip Van 2.73 & up

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