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Usa Standard Gear

USA Standard Gear Spartan Lockers SL GM8.5-28 Differential Locker, GM 8.5 in., 28-spline Axle, Buick, Oldsmobile, Pontiac, Chevy, GMC, Each

SKU: SPZGM8.5-28

Differential Carriers
USA Standard Gear Spartan Lockers SL GM8.5-28 Differential Locker, GM 8.5 in., 28-spline Axle, Buick, Oldsmobile, Pontiac, Chevy, GMC, Each

Usa Standard Gear

USA Standard Gear Spartan Lockers SL GM8.5-28 Differential Locker, GM 8.5 in., 28-spline Axle, Buick, Oldsmobile, Pontiac, Chevy, GMC, Each

SKU: SPZGM8.5-28

Differential Carriers
A$811.07
BACKORDER This item will be special ordered in for you. Contact us prior to purchase if you require an ETA.
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Description

Spartan lockers are affordable, reliable traction. These USA Standard Gear Spartan lockers are mechanical lockers that fit into a standard differential carrier, replacing the open spider gears. They do not use thrust washers and have a revolutionary spring and pin design to make installation a snap! Spartan lockers feature high-nickel 9310 chromoly drivers and couplers for added strength. Give your vehicle great traction and save some cash. Drop in Spartan lockers for improved traction. They're available for a variety of makes and models spanning more than a half-century.

Part Type

Differential Carriers

Data: v4.2 - Upd: 2026-10-16 00:16:00

Specifications

Product Attributes - Brand
USA Standard Gear
Product Attributes - Manufacturer's Part Number
SL GM8.5-28
Product Attributes - Part Type
Differential Carriers
Product Attributes - Product Line
USA Standard Gear Spartan Lockers
Product Attributes - UPC
883584170402
Product Attributes - Differential Case Design Type
GM 8.5 in.
Product Attributes - Remanufactured
No
Product Attributes - Aftermarket Carrier Style
Mechanical locker
Product Attributes - Cover Bolts
10
Product Attributes - Axle Shaft Spline Quantity
28
Product Attributes - Manufacturer of Axle
GM
Product Attributes - Carrier Material
Steel
Product Attributes - Carrier Bearings Included
No
Product Attributes - Quantity
Sold individually.
Product Attributes - Notes
Includes a heavy-duty crosspin shaft. Designed to use the stock slide gears.

Reference Information

Brand Name/s Usa Standard Gear
StreetFX SKU spzGM8.5-28
SFX Item ID 4896996
Supplier Item Code 4896996
Manufacturer SKU GM8.5-28
Manufacturer UPC N/A
Alternative References SPZ-17040, 28-spline

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