Rear Main Seals

Perhaps nothing will ruin a gearhead’s day faster than a dark oily spot on the garage floor from a leaking rear main seal. And since replacing a rear main seal isn’t...

Perhaps nothing will ruin a gearhead’s day faster than a dark oily spot on the garage floor from a leaking rear main seal. And since replacing a rear main seal isn’t typically the easiest job, make sure your rear main seal repair goes right the first time by getting quality rear main seals from Summit Racing.

Whether you need a rear main seal for a Jeep 4.0L, the ubiquitous “SBC” small block Chevy 350, GM LS, Ford Windsor, Mopar LA, or whatever’s under your hood, you’ll find engine rear main seals for virtually every popular motor, often with one- and two-piece rear main seal options.

An engine rear main seal is a critical...

An engine rear main seal is a critical seal that ensures oil from the motor doesn’t seep past the crankshaft, into the transmission or onto your garage floor. Rear main seals often dry out with age, become brittle, and crack—particularly on cars and trucks that don’t get driven often. But if you notice a leak or drip from your engine’s rear main seal, don’t immediately think a rear main seal replacement is necessary. Try driving around for a week or two. There’s a chance your seal has dried out from sitting too long, and running your engine regularly for a little while may recoat it with oil, saturate the material again, and restore the seal.

Additionally, make absolutely sure your leak is from the rear main seal in the first place—it’s not uncommon for weeping valve cover gaskets or distributor seals to be misdiagnosed as rear main seal leaks. (And those are much, much easier to fix.) So, confirm that your leak is coming off the rear main first before starting down the road to a rear main seal repair.

For a lot of older engines though, their original rear main seals will often need to be replaced as they age. And a rear main seal repair can be a cumbersome, time-consuming job, so it makes sense to replace your engine’s rear main seal with a good replacement seal to ensure you don’t have to repeat the job anytime soon.

If your SBC Chevy, 351 Ford, Jeep 4.0L, or GM LS has a rear main seal that’s starting to mark its territory, replace it with a quality replacement rear main seal from Summit Racing. See all your rear main seal options here.

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Ajusa Rear Main Bearing Seals 15056500

Rear Main Seals, Rear Crankshaft Oil Seals, One-piece, Alfa Romeo, Cadillac, Chevy, Chrysler, Dodge, Fiat, Hyundai, Jeep, Kia, Mitsubishi, Saab, Each

Part Number: AJU-15056500

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Mahle Original Rear Main Seals JV1657

Rear Main Seals, Original, One-piece, Viton®, Chevy, Small Block LS, Each

Part Number: MAH-JV1657

5.0 out of 5 stars ( 7 )

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SCE AccuSeal Pro Rear Main Seals 22804

SCE AccuSeal Pro Rear Main Seals 22804

Rear Main Seal, Viton®, Each

Part Number: SCE-22804

3.8 out of 5 stars ( 5 )

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Fel-Pro Rear Main Seals BS 11829-1

Rear Main Seal, 2-Piece, Rubber, Chevy, Small Block, Each

Part Number: FEL-BS118291

4.61 out of 5 stars ( 18 )

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Timken Rear Main Seals 100085

Rear Main Seal, 1-Piece, PTFE, Each

Part Number: TMK-100085

3.0 out of 5 stars ( 2 )

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Fel-Pro Rear Main Seals BS 40520

Rear Main Seal, 1-Piece, Rubber, Chevy, Small Block, Each

Part Number: FEL-BS40520

4.0 out of 5 stars ( 8 )

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Fel-Pro Rear Main Seals BS 40626

Rear Main Seals, One-piece, PTFE, AM General, Avanti, Buick, Cadillac, Chevrolet, Excalibur, GMC, Isuzu, Oldsmobile, Pontiac, Each

Part Number: FEL-BS40626

4.92 out of 5 stars ( 13 )

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Fel-Pro Rear Main Seals BS 40096-1

Rear Main Seal, 2-Piece, Rubber, Chevy, Each

Part Number: FEL-BS400961

5.0 out of 5 stars ( 3 )

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Mr. Gasket Rear Main Seals 1968

Rear Main Seal, 2-Piece, Chrysler, Big Block, 361-440, Each

Part Number: MRG-1968

4.5 out of 5 stars ( 2 )

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Fel-Pro Rear Main Seals BS 30136

Rear Main Seal, 2-Piece, Rubber, Ford, L4/V6/V8, Each

Part Number: FEL-BS30136

3.67 out of 5 stars ( 3 )

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Fel-Pro Rear Main Seals BS 40013

Rear Main Seal, 2-Piece, Silicone, Chevy, Small Block, Each

Part Number: FEL-BS40013

5.0 out of 5 stars ( 8 )

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SCE AccuSeal E Rear Main Seals 12905

Rear Main Seal, 2-Piece, Silicone, AMC, V8, Each

Part Number: SCE-12905

Not Yet Reviewed

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SCE AccuSeal Pro Rear Main Seals 22805

Rear Main Seal, 2-Piece, Viton®, Pontiac, V8, Each

Part Number: SCE-22805

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Fel-Pro Rear Main Seals BS 40032

Rear Main Seal, 2-Piece, Rubber, Ford, 429/460, Each

Part Number: FEL-BS40032

5.0 out of 5 stars ( 5 )

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SCE AccuSeal Pro Rear Main Seals 21305

Rear Main Seal, 2-Piece, Viton®, Chevy, Big Block V8, Each

Part Number: SCE-21305

Not Yet Reviewed

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Fel-Pro Rear Main Seals BS 40240

Rear Main Seal, 2-Piece, Rubber, Chrysler, L6/Big Block V8, Each

Part Number: FEL-BS40240

4.44 out of 5 stars ( 9 )

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Cometic Rear Main Seals C5379

Rear Main Seal, 2-Piece, Rubber, Avanti, Buick, Chevy, Checker, GMC, Oldsmobile, Pontiac, Each

Part Number: CGT-C5379

5.0 out of 5 stars ( 1 )

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Fel-Pro Rear Main Seals BS 40245

Rear Main Seal, 2-Piece, Rubber, Chrysler, Dodge, Plymouth, V8, Each

Part Number: FEL-BS40245

5.0 out of 5 stars ( 5 )

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Mahle Original Rear Main Seals JV618

Ford-Pass, Trk&Ind;Linc;Merc:370, 429, 460(68-94) Split Seal Option to JV730

Part Number: MAH-JV618

5.0 out of 5 stars ( 2 )

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Cometic Rear Main Seals C15560

Rear Main Seals, Single Split Seal, 1-Piece, Chevy, 6.5L, 6.6L, 7.0L, 7.4L, Each

Part Number: CGT-C15560

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Cometic Rear Main Seals C5682

Rear Main Seal, 2-piece Style, Viton®, Chevy, Big Block, Each

Part Number: CGT-C5682

Not Yet Reviewed

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SCE AccuSeal Pro Rear Main Seals 23505

Rear Main Seal, 2-Piece, Viton®, Ford, Big Block 385 Series V8, Each

Part Number: SCE-23505

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Fel-Pro Rear Main Seals BS 40003

Rear Main Seal, 2-Piece, Rubber, AMC, V8, Each

Part Number: FEL-BS40003

5.0 out of 5 stars ( 9 )

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Mahle Original Rear Main Seals JV1634

Rear Main Seals, Original, One-piece, PTFE Rubber, Chevy, Each

Part Number: MAH-JV1634

1.0 out of 5 stars ( 1 )

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SCE AccuSeal E Rear Main Seals 11305

Rear Main Seal, AccuSeal E, 2-piece, Silicone, Chevy, Big Block, Each

Part Number: SCE-11305

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