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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...
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 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.
Showing In Stock Items. Show All 127 Items.
Rear Main Seal, 1-Piece, Rubber, Ford, Small Block, Each
Part Number: FEL-BS40620
Estimated Ship Date: Today
Estimated Ship Date: Today
Rear Main Seal, 2-Piece, Rubber, Chrysler, L6/Big Block V8, Each
Part Number: FEL-BS40240
Estimated Ship Date: Today
Estimated Ship Date: Today
Rear Main Seal, 1-Piece, Rubber, Ford, Lincoln, Mercury/Mazda, L4/V6/V8/V10, Each
Part Number: FEL-BS40644
Estimated Ship Date: Today
Estimated Ship Date: Today
Rear Main Seal, One-piece, Rubber, Avanti, Ford, Jaguar, Laforza, Lincoln, Mazda, Mercury, Merkur, Panoz, Qvale, Each
Part Number: MAH-JV523
Estimated Ship Date: Today
Estimated Ship Date: Today
Rear Main Seal, Original, One-Piece, PTFE, Ford Style, Each
Part Number: MAH-JV1635
Estimated Ship Date: Today
Estimated Ship Date: Today
Rear Main Seal, 1-Piece, Rubber, Each
Part Number: FEL-BS40739
Estimated Ship Date: May 27, 2026 if ordered today
Estimated Ship Date: May 27, 2026 if ordered today
Rear Main Seal, 2-Piece, Rubber, Chrysler, Dodge, Plymouth, V8, Each
Part Number: FEL-BS40245
Estimated Ship Date: Today
Estimated Ship Date: Today
Bui;Cad;Chev-Pass&Trk;GMC;Jeep;Olds;Pont:225,231,252,260,300,340,350,400,40
Part Number: MAH-JV742
Not Yet Reviewed
Estimated Ship Date: Today
Estimated Ship Date: Today
Engine Crankshaft Seal, Engine Crankshaft Seal, Seal ASM-CR/SHF RR Oil, Each
Part Number: ADO-12592195
Estimated Ship Date: Today
Estimated Ship Date: Today
Rear Main Seal, 2-piece Style, Viton®, Chrysler, Dodge, Plymouth, Big Block, 426 Hemi, Each
Part Number: CGT-C5686
Estimated Ship Date: Today
Estimated Ship Date: Today
Rear Main Seal, 1-Piece, Rubber, Each
Part Number: FEL-BS40464
Not Yet Reviewed
Estimated Ship Date: Today
Estimated Ship Date: Today
Rear Main Seals, Ajusa Rear Main Bearing Seals, 1-Piece, for Hyundai, for Kia, Chrysler, Dodge, Genesis, Mitsubishi, Plymouth, Each
Part Number: AJU-15048600
Not Yet Reviewed
Estimated Ship Date: Jun 18, 2026 if ordered today
Estimated Ship Date: Jun 18, 2026 if ordered today
Engine Crankshaft Seal
Part Number: NAL-12608750
Not Yet Reviewed
Estimated Ship Date: Aug 26, 2026 if ordered today
Estimated Ship Date: Aug 26, 2026 if ordered today
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
Not Yet Reviewed
Estimated Ship Date: Jun 18, 2026 if ordered today
Estimated Ship Date: Jun 18, 2026 if ordered today
Rear Main Seal, 1-Piece, Rubber, Buick, Chevy, Oldsmobile, Pontiac, Each
Part Number: FEL-BS40649
Estimated Ship Date: May 27, 2026 if ordered today
Estimated Ship Date: May 27, 2026 if ordered today
Engine Crankshaft Seal
Part Number: MAH-68111
Not Yet Reviewed
Estimated Ship Date: Jun 3, 2026 if ordered today
Estimated Ship Date: Jun 3, 2026 if ordered today
Rear Main Seal, 1-Piece, Rubber, Ford, Land Rover, Mazda, Mercury, Each
Part Number: FEL-BS40619
Estimated Ship Date: May 27, 2026 if ordered today
Estimated Ship Date: May 27, 2026 if ordered today
Engine Crankshaft Seal, Engine Crankshaft Seal
Part Number: MAH-68103
Not Yet Reviewed
Estimated Ship Date: Jun 3, 2026 if ordered today
Estimated Ship Date: Jun 3, 2026 if ordered today
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 27, 2026 if ordered today
Estimated Ship Date: May 27, 2026 if ordered today
Rear Main Seal, 1-Piece, Rubber, Each
Part Number: FEL-BS40624
Not Yet Reviewed
Estimated Ship Date: May 27, 2026 if ordered today
Estimated Ship Date: May 27, 2026 if ordered today
Rear Main Seal, 1-Piece, Rubber, Chrysler, Dodge, Mitsubishi, Each
Part Number: FEL-BS40660
Not Yet Reviewed
Estimated Ship Date: May 22, 2026 if ordered today
Estimated Ship Date: May 22, 2026 if ordered today
Rear Main Seal, 1-Piece, Rubber, Chrysler, Dodge, Fiat, for Hyundai, Jeep, for Kia, Mitsubishi, Ram, Each
Part Number: FEL-BS40663
Not Yet Reviewed
Estimated Ship Date: May 27, 2026 if ordered today
Estimated Ship Date: May 27, 2026 if ordered today
Oil Seal Ford, Mazda . - Left Turn.-
Part Number: AJU-15075900
Not Yet Reviewed
Estimated Ship Date: Jun 17, 2026 if ordered today
Estimated Ship Date: Jun 17, 2026 if ordered today
Rear Main Seals, Rear Crankshaft Oil Seals, One-piece, Chrysler, Dodge, Hyundai, Kia, Mitsubishi, Plymouth, Volvo, Each
Part Number: AJU-15048500
Not Yet Reviewed
Estimated Ship Date: Jun 16, 2026 if ordered today
Estimated Ship Date: Jun 16, 2026 if ordered today
Rear Main Seals, Original, One-piece, Chrysler, Dodge, Eagle, Fiat, Hyundai, Jeep, Kia, Mitsubishi, Each
Part Number: AJU-15052700
Not Yet Reviewed
Estimated Ship Date: Jun 17, 2026 if ordered today
Estimated Ship Date: Jun 17, 2026 if ordered today
