GM 8 7/8" Ring Gear (Truck), 12 Bolt, Differential Cover

Part Number 6058 (was Part Number 10277)

Volume: 1.0 qt. over stock

Dimensions: Click here for dimensions. Depth inside is 4½ inches.

This differential cover fits the GM 8 7/8" (8.875") ring gear 12 bolt differential.

Typical applications include GMC and Chevy trucks and SUVs, ½ and ¾ ton, with 2 or 4 wheel drive, from 1963 to 1991. Some common applications for this rear end cover are:

• C10 & K10, 1967 to 1976
• C20 & K20, 1973 to 1976
• Chevrolet Blazer, 1969 to 1976
• GMC Jimmy, 1969 to 1976
• Suburban 10/1500, 1973 to 1981
• Suburban 20/2500, 1973 to 1991

Check before ordering. These trucks and SUVs came with options for different differentials so please check before ordering. Verify that your vehicle has space for a larger aftermarket differential cover.

Vehicles with coil suspension can have a track bar close to the stock differential cover. Vehicles with leaf suspension generally have plenty of space for a larger aftermarket part.

Installations

Read about an install of this cover on a 1972 Chevrolet C-10 in Classic Trucks magazine.

1972 C-10 Cheyenne

Bruce installed this PML differential cover on his 1972 Chevy C-10 Cheyenne with a 350 ci engine and 700R4 transmission.

        
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1978 Chevy C10

Stephen installed this PML differential cover on his 1978 Chevy C10.

Stephen said that changing out the stock cover for a PML heavy duty cover is " a good practical upgrade". Our thanks to him for choosing PML for his truck.

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PML Differential Cover Features:

• Increased oil capacity for cooler temperatures
• Sand-cast aluminum with raised fins
• Thick wall construction to add strength to differential housing
• Thick gasket flange will not bend when bolts are tightened
• Machined gasket surface for a secure seal using RTV or factory reusable gasket
• Oil changes without removing the cover
• All hardware provided, including magnetic drain plug

Learn more about finishes and construction of PML parts.