Best 12 Bolt Rear End Cover for GM, Truck and Jeep Applications

#1 · Best Overall

1. TA Performance TA-1810

Best for: Heavy-Load Bearing-Cap Support.

Why it ranks #1: Designed for GM 8.875-inch 12-bolt car axles, it includes two bearing-cap load bolts, fill and drain ports, gasket, bolts, and instructions.

Two swivel-foot load bolts give the TA Performance TA-1810 a clear role: supporting bearing caps under severe loads and acceleration. Its 356 aircraft-grade aluminum is heat treated to T6 specifications and stress relieved, while fill and drain ports address routine fluid servicing.

The load bolts’ swivel feet bear against the caps, providing the support this girdle is specifically intended to add under demanding acceleration. Its fill and drain ports make fluid access part of the cover’s layout, which can simplify servicing compared with a cover listing no such ports. TA Performance also states that the design adds about half a pint of fluid capacity and averages a 15-degree operating-temperature decrease; a gasket, bolts, and instructions are included.

Skip it if you need a basic truck-cover replacement rather than bearing-cap support; CFR Performance's black steel cover lists Chevy/GMC truck applications.

Choose the TA-1810 for a GM 8.875-inch 12-bolt car rear end where bearing-cap support under severe loads and built-in service ports are priorities. Its specific application and girdle function make it distinct from a plain replacement cover.

Listed on Amazon as: NEW GM 8.875" 12-Bolt CAR TA Performance Aluminum Rearend Girdle Cover TA-1810

#2 · Reinforced Aluminum

2. ProForm Reinforced Cover

• Dimensions: 12 x 12 x 4 in
• Weight: 7.4 lb

Best for: Reinforced GM Cover Upgrade.

Why it ranks #2: Specified for GM 12-bolt applications, this reinforced aluminum cover is designed to strengthen the housing and includes main-cap bolts and a magnetic drain plug.

Reinforced aluminum construction is the defining feature of this ProForm cover, intended to stiffen the rear housing’s main-cap area under heavy torque. The magnetic drain plug and main-cap bolts are also included, combining a structural aim with hardware and a service feature for GM 12-bolt owners.

ProForm says the reinforced lightweight aluminum cover strengthens the housing case and reduces flex around the main caps once installed. That makes its stated purpose especially relevant for applications involving heavy torque, rather than merely replacing a plain cover. The included main-cap bolts support the installation package, while the magnetic drain plug adds a feature at the fluid service point. Its black crinkle powder coat supplies the listed exterior finish.

Skip it if you need a listed vehicle-year range before selecting a cover; CFR Performance's 1962–1982 truck cover names its applications.

This ProForm is a fit for buyers prioritizing stated housing reinforcement on a GM 12-bolt rear end, especially where heavy torque is a concern. Its listing does not specify vehicle years or ring-gear size, so identify the exact application separately.

Listed on Amazon as: Proform Differential Cover, Reinforced, Main Cap Bolts/Magnetic Drain Plug Included, Aluminum, Black Crinkle Powder Coat, GM 12-Bolt, Each

#3 · GM Car Fit

3. Moser Engineering 7110

• Dimensions: 12.5 x 12.3 x 4.6 in
• Weight: 0.01 oz

Best for: GM Passenger-Car 12-Bolt.

Why it ranks #3: This aluminum differential cover kit is listed for a GM 8.875-inch 12-bolt car rear end, making its application unusually specific.

The Moser Engineering 7110 is identified as an aluminum differential cover kit for a GM 8.875-inch 12-bolt car rear end. That specific car application makes it relevant to owners seeking a cover for the stated passenger-car configuration, rather than relying on a truck-oriented 12-bolt description.

Its 8.875-inch ring-gear specification and 12-bolt car designation give buyers two concrete identifiers to compare with their rear end before choosing a replacement. The aluminum material provides a different construction choice from the steel covers in this group, but the supplied listing does not describe additional reinforcement or service ports. Treat it as a focused cover option for the named GM car setup, not as a universal GM 12-bolt part.

Skip it if you need stated service ports or bearing-cap support; TA Performance TA-1810 lists fill and drain ports plus load bolts.

Consider this Moser cover if your project uses the specified GM 8.875-inch 12-bolt car rear end and aluminum construction suits your replacement plan. The listing is sparse on installation contents, so it offers less detail about included service components.

Listed on Amazon as: Moser Engineering 7110 Aluminum Rear Differential Cover for 12 Bolt GM Rear End

#4 · Chrome Steel

4. Moroso 85330

• Weight: 2.9 lb

Best for: Chrome GM 12-Bolt Replacement.

Why it ranks #4: A chrome-plated steel rear end cover listed for Chevy 12-bolt applications, it offers a distinct material and finish from the aluminum choices.

Chrome-plated steel gives the Moroso 85330 a bright finish for a GM 12-bolt rear-end cover, with alloy steel identified as its material. Its stock-size designation and included rear-end cover component make it a straightforward option for buyers prioritizing a chrome appearance.

The listing identifies this as a Chevy 12-bolt rear-end differential cover and specifies a stock size, which helps frame it as a conventional replacement rather than a stated girdle upgrade. Chrome-plated steel brings the named finish to the assembly, while its heavy-duty manufacturer grade signals the classification supplied in the listing. No vehicle-year range, ring-gear measurement, drain plug, or gasket is specified, so application details require careful matching to the rear end.

Skip it if you require a stated vehicle-year and ring-gear application; CFR Performance's chrome cover specifies 1964–1972 and 8.875 inches.

The Moroso 85330 suits a buyer seeking a chrome-plated steel cover for a Chevy 12-bolt rear end with stock sizing. Its fitment details are broad, so identify the specific rear-end configuration before relying on the listing.

Listed on Amazon as: Moroso 85330 Chrome 12 Bolt Rear End Cover for GM

#5

5. CFR Performance Chrome Cover

• Dimensions: 14 x 14 x 4 in
• Weight: 2.2 lb

Best for: Chrome Classic GM Car Cover.

Why it ranks #5: Fits 1964–1972 Chevy and GM passenger-car 12-bolt axles with an 8.875-inch ring gear and uses chrome-plated steel.

Chrome-plated steel gives this CFR Performance cover a polished appearance while its stated fit targets 1964–1972 Chevy and GM passenger-car 12-bolt rear ends with an 8.875-inch ring gear. That combination suits owners seeking a period-appropriate replacement with a bright finish.

The 8.875-inch ring-gear specification and passenger-car description help distinguish this cover from the brand’s truck-oriented 8-3/4-inch listing. Chrome-plated steel provides the bright show-quality finish and stated corrosion resistance for under-vehicle use. For a restoration or appearance-focused replacement, those details connect the finish choice to the cover’s intended classic GM application; the supplied information does not identify a drain plug or reinforcement features.

Skip it if you want a truck application with an 8-3/4-inch ring gear; CFR Performance's black steel truck cover lists that configuration.

This is a relevant choice for a 1964–1972 Chevy or GM car with the specified 8.875-inch 12-bolt rear end, especially when chrome appearance matters. Keep its passenger-car application separate from truck 12-bolt fitments.

Listed on Amazon as: CFR Performance Steel Diff Cover – 1964-72 Chevy/GM 8.875" – Chrome

#6 · Truck Fit

6. CFR Performance Black Cover

• Weight: 1.98 lb

Best for: Classic GM Truck Replacement.

Why it ranks #6: Fits 1962–1982 Chevy and GMC 1/2-ton trucks with an 8.75-inch 12-bolt rear end, plus listed full-size Blazer and Jimmy applications.

The black steel construction gives this CFR Performance cover a factory-style appearance while serving 12-bolt truck rear ends with an 8-3/4-inch ring gear. Its stated application includes 1962–1982 Chevy and GMC half-ton trucks, giving owners a clearly defined replacement option across both two- and four-wheel-drive models.

Fitment extends to full-size Chevy Blazers and GMC Jimmys from 1967–1981 when they use the specified 12-bolt, 8-3/4-inch ring-gear setup. That application detail helps narrow the search to the listed truck and SUV rear ends rather than passenger-car versions. Black steel construction provides the cover’s stated finish and corrosion resistance, making it a practical choice for a straightforward rear-cover replacement where this exact configuration applies.

Skip it if you need a cover for a passenger-car 8.875-inch rear end; this listing specifies truck applications and an 8-3/4-inch ring gear.

Choose this CFR Performance cover if your classic Chevy or GMC half-ton truck, full-size Blazer, or Jimmy matches the stated 12-bolt 8-3/4-inch setup. Its application is specific, so distinguish that truck configuration from other GM 12-bolt rear ends.

Listed on Amazon as: CFR Performance Steel Rear Diff Cover – 1962-1982 Chevy/GMC 12-Bolt Black

#7

7. Bruce & Shark Aluminum Cover

• Dimensions: 14.17 x 13.78 x 7.87 in
• Weight: 5.06 lb

Best for: GM Truck Cover With Drain.

Why it ranks #7: Lists Chevy and GMC 1/2-ton truck and full-size Blazer and Jimmy fitment; the listing specifies a 12-bolt cover with gasket and drain plug.

A supplied drain plug is the practical distinction on this Bruce & Shark 12-bolt cover, giving owners a stated feature for servicing the rear end. Its listed fitment covers Chevy and GMC half-ton trucks from 1962–1982, plus specified full-size Blazer and Jimmy models from 1967–1981.

The cover is listed for the named GM truck and SUV applications, while its 12-bolt identification helps separate it from 10-bolt versions that appeared on some of those models. The seller specifically advises comparing the existing cover, an important check before ordering. A gasket and drain plug are noted, so the package addresses sealing and fluid-draining components; the aluminum construction offers an alternative to steel covers, though no performance figures are supplied.

Skip it if you want a specifically stated 8-3/4-inch ring-gear application; CFR Performance's black steel truck cover lists that specification.

This suits owners replacing a cover on a listed Chevy or GMC truck, Blazer, or Jimmy who value an included drain plug and gasket. Check the existing differential’s bolt pattern, since some eligible model years used 10-bolt units.

Listed on Amazon as: Bruce & Shark 12 Bolt Black Aluminum Differential Rear End Cover Fit for Chevy for GMC 1/2 Ton 1962-1982, for Chevy Blazer 1/2 Ton aFull-Size 1967-1981, for GMC Jimmy 1/2 Ton Full-Size 1967-1981

#8

8. TEKKOAUTO Aluminum Cover

• Weight: 4.84 lb

Best for: Polished Aluminum GM Truck Fit.

Why it ranks #8: Its polished cast-aluminum cover is listed for 8.75-inch 12-bolt Chevy and GMC trucks and full-size Blazer and Jimmy models.

A polished cast-aluminum finish distinguishes this TEKKOAUTO cover, which is listed for 12-bolt truck rear ends with an 8.75-inch ring gear. Its stated applications include Chevy and GMC half-ton trucks from 1962–1982 and full-size Blazer and Jimmy models from 1967–1981.

The combination of 12-bolt pattern and 8.75-inch ring-gear designation provides two useful application checks for the listed GM trucks and SUVs. Matching those details to the existing rear end helps keep the purchase focused on the specified truck-style setup. Polished cast aluminum supplies the appearance described by the seller, while the listing does not mention a drain plug, gasket, or additional reinforcement, so buyers should not assume those components are included.

Skip it if you need a stated drain plug and hardware; Speedway Motors' Jeep corporate 12-bolt cover lists both.

Pick this TEKKOAUTO cover for a listed Chevy or GMC truck, Blazer, or Jimmy when the rear end matches its 12-bolt 8.75-inch specification and polished aluminum suits the project. Included service parts are not specified.

Listed on Amazon as: Differential Rear End Cover Replacement for C10 Blazer Jimmy 8.75" Truck

#9

9. Speedway Motors Jeep Cover

• Dimensions: 12.8 x 11.5 x 5.4 in
• Weight: 5 lb

Best for: Jeep Corporate 12-Bolt Cover.

Why it ranks #9: This polished aluminum cover targets Jeep corporate 12-bolt rear differentials and includes a drain plug and mounting bolts, but is not a GM fit.

Specific Jeep corporate 12-bolt fitment sets this Speedway Motors cover apart from the GM-focused options. Its polished aluminum construction is described as resisting rust and surface wear, and the included drain plug and mounting bolts give owners named components for installation and fluid service.

The direct-fit claim is tied specifically to Jeep corporate 12-bolt rear differentials, making that application the central selection point. A polished aluminum finish supplies the stated appearance and resistance to rust and surface wear. Included mounting bolts support the installation workflow, while the drain plug provides an identified feature for routine servicing. The listing does not describe bearing-cap reinforcement, so its documented strengths are fitment, finish, hardware, and drain access rather than girdle support.

Skip it if you have a GM truck rear end; TEKKOAUTO's 8.75-inch 12-bolt cover lists Chevy and GMC truck fitment.

This Speedway Motors cover is for buyers with a Jeep corporate 12-bolt rear differential who want polished aluminum plus included mounting bolts and a drain plug. Its application is Jeep-specific, so it is not a general GM 12-bolt substitute.

Listed on Amazon as: Speedway Motors 12-Bolt Differential Cover, Polished Aluminum Rear Axle Cover with Drain Plug and Mounting Bolts, Durable Construction Compatible with Jeep Corporate 12-Bolt

#10

10. Bous Performance Ford Cover

Best for: Polished Ford 12-Bolt Cover.

Why it ranks #10: The listing identifies a Ford 12-bolt application and includes hardware and a drain plug, making it unsuitable for buyers seeking a GM cover.

A polished aluminum finish and included drain plug define this Ford-compatible 12-bolt cover, which also lists hardware in the supplied description. Those features give a replacement buyer a named finish and service component, though the product information does not provide a Ford vehicle or axle-year range.

The stated Ford compatibility is the key application clue, while aluminum construction and a polished finish identify the material and appearance. A drain plug can support fluid servicing, and included hardware addresses mounting components in the package description. Because the listing supplies no vehicle years, axle dimensions, or further fitment details, buyers should treat the application as limited to what is stated rather than assume it covers every Ford 12-bolt rear end.

Skip it if you need a specified GM application; ProForm's reinforced cover is listed for GM 12-bolt rear ends.

Consider this cover if you need a polished aluminum option described for a Ford 12-bolt differential and value the included drain plug and hardware. The listing lacks vehicle-year and axle-dimension details, so its fitment description is limited.

Listed on Amazon as: Aluminum Compatible with Ford 12 Bolt Differential Cover w/Hardware Polished C23809P