Transmission & Drivetrain
Availability
Building awesome horsepower is only part of the story. You need to deliver all that power to your car or truck’s wheels! We’ve got torque-hungry high performance automatic...
Building awesome horsepower is only part of the story. You need to deliver all that power to your car or truck’s wheels! We’ve got torque-hungry high performance automatic and manual transmissions for street and strip applications, torque converters and clutch sets, flexplates and flywheels, plus limited-slip differentials, spools, lockers, ring and pinion sets, driveshafts, U-joints, axles, bearings, C-clip eliminator kits, transfer cases, shift kits, and rebuild kits. We also have a wide selection of trans-brakes, shifters, cables, and accessories—everything you need to put the power to the ground, Summit style.
Building awesome horsepower is only part of the story. You need to deliver all that power to your car or truck’s wheels! We’ve got torque-hungry high performance automatic and manual transmissions for street and strip applications, torque converters and clutch sets, flexplates and flywheels, plus limited-slip differentials, spools, lockers, ring and pinion sets, driveshafts, U-joints, axles, bearings, C-clip eliminator kits, transfer cases, shift kits, and rebuild kits. We also have a wide selection of trans-brakes, shifters, cables, and accessories—everything you need to put the power to the ground, Summit style.
Showing In Stock Items. Show All 33 Items.
Sierra Marine oil seals are available to fit most applications on the water today. Their varying selection offers the best quality materials, along with the proper fit and function to equal or go beyond the OE oil seals they are replacing. For confident, leak-free performance choose Sierra Marine for your oil seals.
Not Yet Reviewed
$5.99
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$19.99
Sierra Marine offers heavy-duty gimbal bearings for a variety of watercraft applications, including Mercury, OMC, Volvo Penta, GLM, Johnson/Evinrude, and Mallory Marine. These specialty ball bearings/races are used in boat engine driveshafts to help maintain alignment. The stock replacements meet or exceed original equipment quality. The bearings are fit-specific; be sure to match up part numbers to ensure a proper fit.
Not Yet Reviewed
$75.99
Sierra Marine offers a wide range of watercraft drive unit replacement parts, including U-joint assemblies for various GLM, Mallory, OMC, Volvo Penta, and Mercruiser stern drive applications. Each component is manufactured with factory materials in accordance with OE specifications to ensure proper fitment and long-lasting performance.
Not Yet Reviewed
$483.99
Sierra Marine offers a wide range of watercraft replacement parts—including these powerhead base gaskets. The composite seals are designed to fit specific applications from Johnson, Evinrude, GLM, Mallory, and more. Each gasket meets or exceeds the quality of the original equipment part to ensure correct fit and performance.
Not Yet Reviewed
$4.99
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$16.99
Sierra Marine heavy-duty U-joints include both straight and 90-degree grease fittings. These universal joints are direct-fit units providing the same performance. Service and maintain your watercrafts with Sierra Marine.
Not Yet Reviewed
$49.99
Sierra is a leading supplier of marine engine and drive parts, offering 1,000's of parts including bushings that are designed to meet or exceed the OE part(s) they replace. For 50 years, Sierra Marine has proudly offered high-quality engine and drive parts as a trusted name in the marine industry. All Sierra Marine products are engineered to meet today's high horsepower engine demands, while withstanding the harsh marine environment. Order the Sierra Marine bushings that are designed for your application needs.
Not Yet Reviewed
$18.99
Sierra Marine offers prop shafts developed for use with OMC and Johnson/Evinrude engines. They have a lot of great features, including exceptional performance quality, durability, and high reliability. Sierra's propeller shafts are made with the industry's best-grade materials and are finished with a minimal quality of leftover tensions, and they are corrosion-resistant. All Sierra products are equal to or better than the original equipment parts that they are meant to replace. For more than 50 years, Sierra has been unmatched in quality and backed by rigorous engineering, testing, and manufacturing standards to produce the best parts in the marine industry. Sierra Marine's commitment to excellence ensures the highest degree of confidence where it counts the most: out on the water. Order the prop shaft designed for your application needs.
Not Yet Reviewed
$349.99
When you only need the bellows and not a whole transom seal kit, Sierra Marine can help. They offer several different shift cable bellows to fit different applications. Made from durable materials, these accordion-shaped parts, when clamped in place, offer protection from water. Maintaining the bellows on your boat is important. Sierra Marine can help with their selection of replacements. Bellows may or may not include clamp(s).
Not Yet Reviewed
$4.99
Sierra offers a comprehensive product line of marine engine and drive parts, including bearing carriers that are designed to support the drive shaft between the transmission and the differential. These outboard motor parts are available for Johnson, Evinrude, Mercury, Mariner and Mercruiser and other engine types. Each Sierra product meets or exceeds the original equipment part it replaces. Select the bearing carriers for your application.
Not Yet Reviewed
$143.99
Sierra Marine transom seal kits provide components to remove and reinstall your boat's sterndrive. Their kit offerings are available for many applications with parts that will fit and function as the originals they are replacing. Service the rear of your boat with the leak-free sealing of Sierra transom kits.
Not Yet Reviewed
$197.99
Sierra Marine offers gimbal bearings to fit a variety of MC-1, R, MR, and Alpha, Gen II, Bravo I/II/III and other watercraft models. These specialty ball bearings/races are used in boat engine driveshafts to help maintain alignment. The stock replacements meet or exceed OE quality. The bearings are fit-specific; be sure to match up part numbers to ensure a proper fit.
Not Yet Reviewed
$71.99
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$75.99
Sierra is a leading supplier of marine engine and drive parts, offering 1,000's of parts including shift spool assemblies. These quality components are designed to meet or exceed the OE part(s) they replace. For 50 years, Sierra Marine has proudly offered high-quality engine and drive parts as a trusted name in the marine industry. All Sierra products are engineered to meet today's high horsepower engine demands, while withstanding the harsh marine environment. Order the assembly for your application needs.
Not Yet Reviewed
$109.99
Sierra Marine offers kits to help you rebuild your gear box. Each kit contains the gears you need to get your boat back on the water. Order the model recommended for your watercraft engine application.
Not Yet Reviewed
$90.99
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$1,198.99
Sierra Marine drive unit caps are made to outperform the original equipment part(s) they are replace. Each Sierra product is engineered to withstand the harsh marine environment while meeting today's high horsepower engine specifications. Order the drive unit component designed for your application.
Not Yet Reviewed
$253.99
Sierra Marine drain plugs are available in magnetic and non-magnetic styles. They provide a direct-fit for missing OE plugs and will keep fluids in and contaminants out. For everything marine, big and small components, Sierra Marine will help you repair and maintain your boat.
Not Yet Reviewed
$151.99
Sierra Marine supplies a wide range of OEM-equivalent parts to maintain and/or repair your watercraft, including rope seal gaskets. These gaskets meet or exceed the original equipment part they replace and are engineered to meet today's high horsepower engine demands while withstanding the harsh marine environment. For over 50 years, Sierra has supplied the best aftermarket parts in the marine industry—so boaters can enjoy the best of times on the water. Upgrade your boat with Sierra Marine rope seal gaskets.
Not Yet Reviewed
$11.99
Sierra is a leading supplier of marine engine and drive parts, offering 1,000's of parts including driveshafts. These quality components are designed to meet or exceed the OE part(s) they replace. For 50 years, Sierra Marine has proudly offered high-quality engine and drive parts as a trusted name in the marine industry. All Sierra Marine products are engineered to meet today's high horsepower engine demands, while withstanding the harsh marine environment. Choose the driveshaft designed for your application needs.
Not Yet Reviewed
$489.99
Sierra Marine forward gear sets replace old worn gears with renewed performance. Offering an OE fit and function, they include forward and pinion gears. Service your boat with Sierra forward gear sets.
Not Yet Reviewed
$121.99
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$353.99
Sierra Marine offers stock replacement needle bearings for a variety of Mercury/Mariner motors. The bearings are quality-machined to meet or exceed original equipment standards. Some models are interchangeable with bearings for other watercraft. Just match up the OEM part number with the model recommended for your marine application.
Not Yet Reviewed
$40.99
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$44.99
Sierra Marine offers numerous types of roller bearings well-suited for many Mercury Marine, Mercruiser and Mercruiser Stern Drive applications, as well as for use on Honda®, and Chrysler/Force/US Marine. These mechanical components support connecting and rotating shafts to help with movement and mobilization within machinery. They also help to reduce friction and accomplish crucial versatility from radial, axial and thrust loads. Select the Sierra Marine roller bearings in the best application option for your needs.
Not Yet Reviewed
$18.99
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$35.99
Sierra Marine offers gearcase seal kits for the purpose of sealing a connection between two parts or flanges with flat surfaces with accuracy for trouble-free installation, functioning, and safety. Wherever a union or flange is necessary, gaskets stop leaks, and replacement is recommended each time the equipment is taken apart and reassembled with the new gasket. For decades, Sierra has proudly been offering high-quality engine and drive parts and accessory kits as a trusted name in today's marine industry. Order the Sierra Marine gearcase seal kit designed for your application needs.
Not Yet Reviewed
$242.99
Sierra Marine offers a wide range of watercraft replacement parts—including these Reed block gaskets. Manufactured from composite material with a coating and Pintoseal, the gaskets are designed for various Mercury/Mariner outboard motor applications. The OEM parts ensure correct fit and performance, enabling you to rebuild, repair, or maintain your vessel.
Not Yet Reviewed
$4.99
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$9.99
Sierra supplies a wide range of OEM-equivalent parts to maintain and/or repair your watercraft, including shift rod gaskets. These gaskets are designed to meet marine-grade standards for outstanding performance, resulting in a durable, high-strength material appropriate for sealing against unwanted leaks, and minimized vibration, low distortion, and conformability over uneven surfaces. For over 50 years, Sierra has supplied the best aftermarket parts in the marine industry—so boaters can enjoy the best of times on the water. Upgrade your boat with Sierra Marine shift rod gaskets.
Not Yet Reviewed
$5.99
Sierra Marine offers numerous types of ball bearings well-suited for many Mercury, Johnson/Evinrude, Mercury Cruiser, and Chrysler/Force/US Marine applications. Ball bearings play an integral role in ensuring the optimal operation of marine and nautical equipment. These bearings are pivotal in marine propulsion systems, providing the necessary support and reducing mechanical wear. Select the ball bearings in the best option for your needs.
Not Yet Reviewed
$18.99
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$57.99
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