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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Fel-Pro Performance Rear Main Bearing Seals 2948

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

Part Number: FEL-2948

4.83 out of 5 stars ( 6 )

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SCE AccuSeal Pro Rear Main Seals 23505

SCE AccuSeal Pro Rear Main Seals 23505

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

Part Number: SCE-23505

Not Yet Reviewed

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MAHLE Original Rear Main Seals JV1686

Caterpillar 3306 and 3304 Engine Series

Part Number: MAH-JV1686

Not Yet Reviewed

Estimated Ship Date: Oct 23, 2025 if ordered today

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Estimated Ship Date: Oct 23, 2025 if ordered today

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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Fel-Pro Rear Main Seals BS 11762-3

Rear Main Seal Set

Part Number: FEL-BS117623

Not Yet Reviewed

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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 )

Estimated Ship Date: Tomorrow

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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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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 )

Estimated Ship Date: Tomorrow

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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

Not Yet Reviewed

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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 )

Estimated Ship Date: Tomorrow

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Mr. Gasket Rear Main Seals 1971

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

Part Number: MRG-1971

1.0 out of 5 stars ( 1 )

Estimated Ship Date: Tomorrow

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Mahle Original Rear Main Seals JV1627

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

Part Number: MAH-JV1627

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Tomorrow

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Mahle Original Rear Main Seals JV728

Engine Main Bearing Gasket Set, Engine Main Bearing Gasket Set

Part Number: MAH-JV728

Not Yet Reviewed

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Fel-Pro Rear Main Seals BS 5115

Rear Main Seal, 1-Piece, Polytetrafluoroethylene Rubber, International, Each

Part Number: FEL-BS5115

Not Yet Reviewed

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Mr. Gasket Rear Main Seals 1960

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

Part Number: MRG-1960

5.0 out of 5 stars ( 3 )

Estimated Ship Date: Tomorrow

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Fel-Pro Rear Main Seals BS 40096

Rear Main Seal, 2-Piece, Rubber, Chevy, 348/409, Each

Part Number: FEL-BS40096

Not Yet Reviewed

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Cometic Rear Main Seals C5683

Engine Crankshaft Seal

Part Number: CGT-C5683

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Nov 7, 2025 if ordered today

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Estimated Ship Date: Nov 7, 2025 if ordered today

Mahle Original Rear Main Seals JV705

Rear Main Seals, 2-piece, Rubber, Cadillac, Chevrolet, GMC, ISO, Each

Part Number: MAH-JV705

3.5 out of 5 stars ( 2 )

Estimated Ship Date: Tomorrow

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Mahle Original Rear Main Seals JV688

Rear Main Seals, 2-piece, Rope Seal Material, Chevrolet, Each

Part Number: MAH-JV688

Not Yet Reviewed

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SCE AccuSeal Pro Rear Main Seals 21155

Rear Main Seal, 1-Piece, Viton®, Chevy, Each

Part Number: SCE-21155

Not Yet Reviewed

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Ajusa Rear Main Bearing Seals 15097800

Oil Seal Bmw- Left Turn.-

Part Number: AJU-15097800

Not Yet Reviewed

Estimated Ship Date: Nov 10, 2025 if ordered today

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Estimated Ship Date: Nov 10, 2025 if ordered today

Fel-Pro Rear Main Seals BS 30138

Rear Main Seal, 2-Piece, Rubber, Ford, 332-428, FE, Each

Part Number: FEL-BS30138

5.0 out of 5 stars ( 6 )

Estimated Ship Date: Tomorrow

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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 )

Estimated Ship Date: Tomorrow

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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 )

Estimated Ship Date: Tomorrow

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