GM 8.875" 12-Bolt "Truck Style" Fiber Differential Cover Gasket
GM 8.875" 12-Bolt "Truck Style" Fiber Differential Cover Gasket
SKU: SKU: SP4932
In stock
Product Details
Features
- Fiber gasket seals the differential cover, prevents gear oil leaks
- Direct replacement for leaking, damaged, or missing cover gaskets
- Fits GM 8.875" "truck style" 12-bolt axles — C10/K10/Silverado
- Not the same as the "car style" 12-bolt — confirm your axle type
Description
This fiber differential cover gasket is sized and punched for the GM 8.875" "truck style" 12-bolt rear axle housing. It's a direct replacement for a leaking, damaged, or missing cover gasket, providing a reliable fiber seal between the differential cover and axle housing sealing rail during cover reinstallation, fluid changes, or cover upgrades.
GM used two different 12-bolt differential cover designs on 8.875" axles — a "car style" and a "truck style" — and the two are not interchangeable. This gasket is cut for the truck-style cover, commonly found on Chevrolet C10/K10 and Silverado trucks. If your application is a Camaro, Chevelle, or Nova, TSP's "car style" 12-bolt gasket (SKU SP4930) is the correct part instead.
This gasket is sold individually and includes no cover, hardware, or drain plug. Confirm your axle model and cover style before ordering.
Applications
Fits GM 8.875" "truck style" 12-bolt rear axle housings. Common applications include Chevrolet C10/K10 and Silverado trucks.
Installation
Sold individually — no cover, hardware, or drain plug included. Verify you have the truck-style cover, not the car-style cover, before ordering — see SKU SP4930 for the car-style version. Confirm gasket or RTV sealing requirements and fluid fill level.
Specs
| Style | 12-Bolt |
| Material | Fiber |
| Quantity | Sold Individually |
Engine Fitment
COMPATIBLE WITH
GM 8.875" 12-BOLT "TRUCK STYLE" DIFFERENTIAL COVER APPLICATIONS
• Fits GM 8.875" truck-style rear axle housings using the factory 12-bolt cover pattern
• Not interchangeable with the GM 8.875" car-style 12-bolt cover — verify your specific axle casting before ordering
• Match cover shape, sealing rail, and fill/drain configuration before installation
NOTES
• "Car style" and "truck style" 12-bolt covers are not interchangeable despite sharing the same bolt count and nominal ring gear size — confirm which style your vehicle uses before ordering
• Verify axle model, bolt pattern, ring gear size, and housing shape before installation
• Confirm gasket or RTV sealing requirements and fluid fill level
• Check spare tire, sway bar, and suspension clearance where applicable (truck-specific)
COMMON VEHICLE APPLICATIONS
Chevrolet C10 / K10 truck applications
Chevrolet Silverado (select years/configurations)
Chevrolet/GMC Suburban / Blazer / Jimmy
Chevrolet/GMC G-Series van applications
Q&A
What's the difference between this and the other GM 8.875" 12-bolt gasket?
GM used two different 12-bolt cover designs on the 8.875" axle — "car style" and "truck style." This gasket fits the truck-style cover (C10/K10, Silverado). TSP's other 12-bolt gasket (SKU SP4930) fits the car-style cover (Camaro, Chevelle, Nova, Firebird) instead. The two are not interchangeable.
Will this fit my Camaro or Chevelle?
No — this is the truck-style cover gasket. For Camaro, Chevelle, Nova, or Firebird, see TSP's car-style 12-bolt gasket (SKU SP4930).
Does this come with the cover or hardware?
No — sold individually. Cover, hardware, and drain plug are not included.
What's this gasket made of?
Fiber.
Emissions Notice
This product does not affect vehicle emissions and is not subject to emissions compliance regulations.
GM 8.875" 12-Bolt "Truck Style" Fiber Differential Cover Gasket
This fiber differential cover gasket is sized and punched for the GM 8.875" "truck style" 12-bolt rear axle housing. It's a direct replacement for a leaking, damaged, or missing cover gasket, providing a reliable fiber seal between the differential cover and axle housing sealing rail during cover reinstallation, fluid changes, or cover upgrades.
GM used two different 12-bolt differential cover designs on 8.875" axles — a "car style" and a "truck style" — and the two are not interchangeable. This gasket is cut for the truck-style cover, commonly found on Chevrolet C10/K10 and Silverado trucks. If your application is a Camaro, Chevelle, or Nova, TSP's "car style" 12-bolt gasket (SKU SP4930) is the correct part instead.
This gasket is sold individually and includes no cover, hardware, or drain plug. Confirm your axle model and cover style before ordering.
Applications
Fits GM 8.875" "truck style" 12-bolt rear axle housings. Common applications include Chevrolet C10/K10 and Silverado trucks.
Installation
Sold individually — no cover, hardware, or drain plug included. Verify you have the truck-style cover, not the car-style cover, before ordering — see SKU SP4930 for the car-style version. Confirm gasket or RTV sealing requirements and fluid fill level.
COMPATIBLE WITH
GM 8.875" 12-BOLT "TRUCK STYLE" DIFFERENTIAL COVER APPLICATIONS
• Fits GM 8.875" truck-style rear axle housings using the factory 12-bolt cover pattern
• Not interchangeable with the GM 8.875" car-style 12-bolt cover — verify your specific axle casting before ordering
• Match cover shape, sealing rail, and fill/drain configuration before installation
NOTES
• "Car style" and "truck style" 12-bolt covers are not interchangeable despite sharing the same bolt count and nominal ring gear size — confirm which style your vehicle uses before ordering
• Verify axle model, bolt pattern, ring gear size, and housing shape before installation
• Confirm gasket or RTV sealing requirements and fluid fill level
• Check spare tire, sway bar, and suspension clearance where applicable (truck-specific)
COMMON VEHICLE APPLICATIONS
Chevrolet C10 / K10 truck applications
Chevrolet Silverado (select years/configurations)
Chevrolet/GMC Suburban / Blazer / Jimmy
Chevrolet/GMC G-Series van applications
SPECIFICATIONS
Style: 12-Bolt
Material: Fiber
Quantity: Sold Individually
