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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SCE AccuSeal E Rear Main Seals 26605

SCE AccuSeal E Rear Main Seals 26605

Rear Main Seal, Viton, Dodge, Plymouth, Chrysler, Big Block, Hemi, Each

Part Number: SCE-26605

Not Yet Reviewed

Estimated Ship Date: Tomorrow

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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 )

Estimated Ship Date: Tomorrow

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Fel-Pro Rear Main Seals BS 40684

Rear Main Seal, 1-Piece, Rubber, Chrysler, Dodge, Jeep, Ram, Each

Part Number: FEL-BS40684

Not Yet Reviewed

Estimated Ship Date: Tomorrow

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Fel-Pro Rear Main Seals BS 40651

Rear Main Seal, 2-Piece, Rubber, Dodge, Jeep, 5.9L, Each

Part Number: FEL-BS40651

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Tomorrow

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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 C5686

Rear Main Seal, 2-piece Style, Viton®, Chrysler, Dodge, Plymouth, Big Block, 426 Hemi, Each

Part Number: CGT-C5686

2.5 out of 5 stars ( 2 )

Estimated Ship Date: Tomorrow

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Fel-Pro Rear Main Seals BS 40094

Rear Main Seal, 2-Piece, Rubber, Chrysler, Dodge, Plymouth, 360, Each

Part Number: FEL-BS40094

4.67 out of 5 stars ( 3 )

Cannot be shipped Internationally

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Cannot be shipped Internationally

Cometic Rear Main Seals C5683

Engine Crankshaft Seal

Part Number: CGT-C5683

5.0 out of 5 stars ( 2 )

Estimated Ship Date: Tomorrow

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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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Fel-Pro Rear Main Seals BS 40737

Rear Main Seal, 1-Piece, Rubber, Each

Part Number: FEL-BS40737

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Tomorrow

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Mahle Original Rear Main Seals JV1720

Rear Main Seal, 1-Piece, PTFE, Chrysler, Dodge, Jeep, Ram, Each

Part Number: MAH-JV1720

5.0 out of 5 stars ( 2 )

Estimated Ship Date: Tomorrow

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Estimated Ship Date: Tomorrow

Crown Automotive Crankshaft Seals 5140028AA

Crankshaft Seal

Part Number: CWA-5140028AA

Not Yet Reviewed

Estimated Ship Date: Jul 20, 2026 if ordered today

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Estimated Ship Date: Jul 20, 2026 if ordered today

Cometic Rear Main Seals C5203

Rear Main Seal, One-piece, Rubber, Chrysler, Dodge, Ram, Set

Part Number: CGT-C5203

Not Yet Reviewed

Estimated Ship Date: Jul 9, 2026 if ordered today

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Estimated Ship Date: Jul 9, 2026 if ordered today

Dorman Rear Main Seals 635-327

Crankshaft Rear Seal

Part Number: RNB-635-327

Not Yet Reviewed

Estimated Ship Date: May 18, 2026 if ordered today

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Estimated Ship Date: May 18, 2026 if ordered today

Fel-Pro Rear Main Seals BS 40735

Rear Main Seal, 1-Piece, Rubber, Each

Part Number: FEL-BS40735

Not Yet Reviewed

Estimated Ship Date: May 19, 2026 if ordered today

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Estimated Ship Date: May 19, 2026 if ordered today

Fel-Pro Rear Main Seals BS 40408-1

Rear Main Seal, 1-Piece, Rubber, Chrysler, Dodge, Eagle, for Hyundai, Mazda, Mitsubishi, Plymouth, Each

Part Number: FEL-BS404081

1.0 out of 5 stars ( 1 )

Estimated Ship Date: May 19, 2026 if ordered today

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Estimated Ship Date: May 19, 2026 if ordered today

Enginetech Rear Main Seals S1212

Engine Crankshaft Seal 66-87 CHR/DOD/PLY 3.7L/6.6L/7.2L

Part Number: EGN-S1212

Not Yet Reviewed

Estimated Ship Date: May 18, 2026 if ordered today

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Estimated Ship Date: May 18, 2026 if ordered today

Enginetech Rear Main Seals S7709

Engine Crankshaft Seal 03-22 CHR/DOD/JEP/Ram 5.7L/6.1L/L

Part Number: EGN-S7709

Not Yet Reviewed

Estimated Ship Date: May 18, 2026 if ordered today

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Estimated Ship Date: May 18, 2026 if ordered today

Enginetech Rear Main Seals S1196

Engine Crankshaft Seal 58-91 CHR/DOD/PLY 3.7L/3.9L/4.5L/5.2L

Part Number: EGN-S1196

Not Yet Reviewed

Estimated Ship Date: May 19, 2026 if ordered today

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Estimated Ship Date: May 19, 2026 if ordered today

Enginetech Rear Main Seals S2186

Engine Crankshaft Seal 71-03 CHR/DOD/JEP/PLY 5.9L

Part Number: EGN-S2186

Not Yet Reviewed

Estimated Ship Date: May 19, 2026 if ordered today

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Estimated Ship Date: May 19, 2026 if ordered today

Ajusa Rear Main Bearing Seals 15020600

Rear Main Seals, Rear Crankshaft Oil Seals, One-piece, Dodge, Eagle, for Hyundai, for Kia, Mitsubishi, Each

Part Number: AJU-15020600

Not Yet Reviewed

Estimated Ship Date: Jun 15, 2026 if ordered today

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Estimated Ship Date: Jun 15, 2026 if ordered today

Fel-Pro Rear Main Seals BS 40168-1

Rear Main Seal, One-piece, Rubber, Chrysler, Dodge, Eagle, Plymouth, Volkswagen, Each

Part Number: FEL-BS401681

Not Yet Reviewed

Estimated Ship Date: May 19, 2026 if ordered today

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Estimated Ship Date: May 19, 2026 if ordered today

Enginetech Rear Main Seals S5132

Engine Crankshaft Seal 78-05 CHR/DOD/EAG/MAZ/MIT/PLY 1.6L/1.8L/2.0L/2.4L/2.6L/L

Part Number: EGN-S5132

Not Yet Reviewed

Estimated Ship Date: May 19, 2026 if ordered today

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Estimated Ship Date: May 19, 2026 if ordered today

Brian Tooley Racing Rear Main Seals BTR-21335AE

BTR GEN III HEMI REAR MAIN SEAL

Part Number: BTC-BTR-21335AE

Not Yet Reviewed

Estimated Ship Date: May 11, 2026 if ordered today

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Estimated Ship Date: May 11, 2026 if ordered today

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