Transmission Seals & Gaskets
- ACDelco®Genuine GM Parts™ Automatic Transmission Torque Converter SealGenuine GM Parts™ Automatic Transmission Torque Converter Seal by ACDelco®. Designed utilizing the latest technology, this product by ACDelco features premium quality and will perform better than advertised. Perfect for your vehicle...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$3.15 - $69.23
- ACDelco®Genuine GM Parts™ Manual Transmission Input Shaft SealGenuine GM Parts™ Manual Transmission Input Shaft Seal by ACDelco®. Designed utilizing the latest technology, this product by ACDelco features premium quality and will perform better than advertised. Perfect for your vehicle and...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$7.13 - $26.91
- Mopar®Automatic Transmission Oil Pump GasketAutomatic Transmission Oil Pump Gasket by Mopar®. Designed utilizing the latest technology, this product by Mopar features premium quality and will perform better than advertised. Perfect for your vehicle and lifestyle, it is...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$4.73 - $40.88
- Mopar®Clutch Slave Cylinder Line SealClutch Slave Cylinder Line Seal by Mopar®. Designed utilizing the latest technology, this product by Mopar features premium quality and will perform better than advertised. Perfect for your vehicle and lifestyle, it is manufactured to...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$9.28
- Mopar®Manual Transmission Input Shaft Seal RetainerManual Transmission Input Shaft Seal Retainer by Mopar®. Designed utilizing the latest technology, this product by Mopar features premium quality and will perform better than advertised. Perfect for your vehicle and lifestyle, it is...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$3.66 - $367.43
- Mopar®Transmission Output Shaft SealTransmission Output Shaft Seal by Mopar®. Designed utilizing the latest technology, this product features premium quality and will perform better than advertised. Perfect for your vehicle and lifestyle, it is manufactured to meet or...OE quality parts from top original equipment and aftermarket manufacturersThe finest quality at a great price$6.58 - $137.32
- Genuine®Automatic Transmission Drain Plug SealAutomatic Transmission Drain Plug Seal by Genuine®. If your transmission is in need of repair, don’t compromise the performance and safety of your car with suspect, off-brand replacement parts from the local auto parts chain store. On...Designed to restore your vehicle’s transmissionGenuine OE replacement parts from the OE manufacturer$1.55 - $14.42
- Genuine®Automatic Transmission Oil Cooler Coolant Line Connector SealAutomatic Transmission Oil Cooler Coolant Line Connector Seal by Genuine®. If your transmission is in need of repair, don't compromise the performance and safety of your car with suspect, off-brand replacement parts from the local auto...Designed to restore your vehicle’s transmissionGenuine OE replacement parts from the OE manufacturer$5.39 - $24.20
- ATP®Automatic Transmission Extension Housing SealAutomatic Transmission Extension Housing Seal by ATP®. When reliability and OE performance is a must, turn to this ATP product designed to provide a precise fit, OE quality, and function. Made of premium quality materials, it will...OE quality at an affordable priceOE fit and function$2.72 - $23.49
- ATP®Automatic Transmission Selector Shaft SealAutomatic Transmission Selector Shaft Seal by ATP®. When reliability and OE performance is a must, turn to this ATP product designed to provide a precise fit, OE quality, and function. Made of premium quality materials, it will easily...OE quality at an affordable priceOE fit and function$1.37 - $4.65
- ATP®Automatic Transmission Torque Converter SealAutomatic Transmission Torque Converter Seal by ATP®. When reliability and OE performance is a must, turn to this ATP product designed to provide a precise fit, OE quality, and function. Made of premium quality materials, it will easily...OE quality at an affordable priceOE fit and function$3.95 - $15.66
- National®Automatic Transmission Output Shaft SealAutomatic Transmission Output Shaft Seal by National®. Don't just repair a leak, prevent future problems with a National Oil Seal. This part is manufactured using exclusive National Dynamic Edge technology that generates a dynamic...Designed to increase wheel-end reliability by effectively excluding dirt, moisture, and other contaminantsA patent-pending National Dynamic Edge technology allows for maximum protection$2.14 - $43.89
- National®Manual Transmission Extension Housing SealManual Transmission Extension Housing Seal by National®. Don't just repair a leak, prevent future problems with a National Oil Seal. This part is manufactured using exclusive National Dynamic Edge technology that generates a dynamic...Designed to increase wheel-end reliability by effectively excluding dirt, moisture, and other contaminantsA patent-pending National Dynamic Edge technology allows for maximum protection$3.42 - $15.01
- Pioneer Automotive®Oil Pump GasketOil Pump Gasket by Pioneer Automotive®. Designed utilizing the latest technology, this product by Pioneer Automotive features premium quality and will perform better than advertised. Perfect for your vehicle and lifestyle, it is...Made to deliver reliable service for a long timeRugged construction to withstand harsh conditions$2.85 - $20.09
- SKF®Automatic Transmission Shift Shaft SealAutomatic Transmission Shift Shaft Seal by SKF®. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with customers in mind. It will meet your needs and deliver...Made with precision and quality in mindDesigned to meet your specific needs$1.56 - $10.47
- SKF®Manual Transmission Output Shaft SealManual Transmission Output Shaft Seal by SKF®. Do you feel shaking or shuddering when you engage the clutch; hear grinding noise when you shift gears? Does your engine race without an increase in road speed? You're in need of...OE quality parts from top original equipment and aftermarket manufacturersThe finest quality at a great price$3.00 - $71.17
- Timken®Automatic Transmission Extension Housing SealAutomatic Transmission Extension Housing Seal by Timken®. Timken offers the right seal to keep your vehicle running optimally. Timken seals provide ultimate protection from contaminants and help retain lubricants and liquids, ensuring...Machined rubber sealing edge provides greater accuracy and consistency and a better sealing surfaceAn extra dust lip helps keep harmful contaminants out and protects against rust and corrosion$3.11 - $23.60
- Timken®Automatic Transmission Output Shaft SealAutomatic Transmission Output Shaft Seal by Timken®. Timken offers the right seal you need to keep your vehicle run optimally. Timken seals provide ultimate protection from contaminants and help retain lubricants and liquids, ensuring a...Machined rubber sealing edge provides greater accuracy and consistency and a better sealing surfaceAn extra dust lip helps keep harmful contaminants out and protects against rust and corrosion$2.47 - $60.07
- Timken®Automatic Transmission Torque Converter SealAutomatic Transmission Torque Converter Seal by Timken®. Timken offers the right seal you need to keep your vehicle run optimally. Timken seals provide ultimate protection from contaminants and help retain lubricants and liquids,...Machined rubber sealing edge provides greater accuracy and consistency and a better sealing surfaceAn extra dust lip helps keep harmful contaminants out and protects against rust and corrosion$3.13 - $29.26
- Koyo®Automatic Transmission Input Shaft SealAutomatic Transmission Input Shaft Seal by Koyo®. Do you feel shaking or shuddering when you engage the clutch; hear grinding noise when you shift gears? Does your engine race without an increase in road speed? You're in need of...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$14.62 - $15.00
- Corteco®Clutch Release Bearing SealClutch Release Bearing Seal by Corteco®. Designed utilizing the latest technology, this product features premium quality and will perform better than advertised. Perfect for your vehicle and lifestyle, it is manufactured to meet or...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$4.08
- Corteco®Manual Transmission Input Shaft SealManual Transmission Input Shaft Seal by Corteco®. Do you feel shaking or shuddering when you engage the clutch; hear grinding noise when you shift gears? Does your engine race without an increase in road speed? You're in need of...OE quality parts from top original equipment and aftermarket manufacturersThe finest quality at a great price$1.94 - $38.70
- Fel-Pro®Automatic Transmission Transfer Gear GasketAutomatic Transmission Transfer Gear Gasket by Fel-Pro®. If you need durable gaskets to prevent leaks on your vehicle, Fel-Pro is the way to go. Engineered using the latest technologies and global engineering resources, the gaskets meet...Direct OEM replacement for a proper fitEnsures reliable sealing performance$7.73 - $7.86
- CRP®Manual Transmission Shift Linkage SealManual Transmission Shift Linkage Seal by CRP®. Do you feel shaking or shuddering when you engage the clutch; hear grinding noise when you shift gears? Does your engine race without an increase in road speed? You're in need of...Durable construction to withstand everyday wear and tearLeak proof junctions ensure long service life and unrestricted flow$5.58
- NDK®Automatic Transmission Output Shaft SealAutomatic Transmission Output Shaft Seal by NDK®. Do you feel shaking or shuddering when you engage the clutch; hear grinding noise when you shift gears? Does your engine race without an increase in road speed? You're in need of...Direct-fit OE-quality replacement for your factory partHelps restore the proper functionality of your vehicle$8.47 - $14.51
- NOK®Shift Rod SealShift Rod Seal by NOK®. You're in need of transmission repairs, but before you waste your time and gas running down to the auto parts chain store, check out our great selection of replacement transmission parts. With just a phone call...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$4.12 - $4.90
- Payen®Manual Transmission Input Shaft SealManual Transmission Input Shaft Seal by Payen®. Do you feel shaking or shuddering when you engage the clutch; hear grinding noise when you shift gears? Does your engine race without an increase in road speed? You're in need of...OE quality parts from top original equipment and aftermarket manufacturersThe finest quality at a great price$3.49 - $4.66
- ACDelco®GM Genuine Parts™ Automatic Transmission Case Electrical Connector O-RingGM Genuine Parts™ Automatic Transmission Case Electrical Connector O-Ring by ACDelco®. GM Genuine Parts Multi Purpose O-Rings are designed, engineered, and tested to rigorous standards, and are backed by General Motors. GM Genuine...Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE)GM Genuine Parts are designed, engineered and tested to rigorous standards, and are backed by General Motors$1.76 - $5.72
- ACDelco®GM Genuine Parts™ Automatic Transmission Case Housing O-RingGM Genuine Parts™ Automatic Transmission Case Housing O-Ring by ACDelco®. GM Genuine Parts Multi Purpose Seals are designed, engineered, and tested to rigorous standards, and are backed by General Motors. GM Genuine Parts are the true...Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE)GM Genuine Parts are designed, engineered and tested to rigorous standards, and are backed by General Motors$6.31 - $6.35
- ACDelco®GM Genuine Parts™ Automatic Transmission Case Plug SealGM Genuine Parts™ Automatic Transmission Case Plug Seal by ACDelco®. GM Genuine Parts Multi Purpose Seals are designed, engineered, and tested to rigorous standards, and are backed by General Motors. GM Genuine Parts are the true OE...Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE)GM Genuine Parts are designed, engineered and tested to rigorous standards, and are backed by General Motors$6.33 - $7.70
Fluid leaks are one of the most common transmission problems. But while the stains they leave on your driveway or garage floor are annoying, the consequences of leaking fluid are much more serious for your transmission. All transmissions are designed to operate with a fluid capacity that ensures optimum performance and reliability. Transmission fluid lubricates, cools, and in automatic transmissions enables transmission operation. A leak will reduce the fluid quantity in the transmission, and if the leak goes unrepaired and the fluid level is not checked and replenished, the transmission may suffer damage and deliver poor performance. If your transmission is leaking, we have the gaskets, seals and O-rings to restore proper fluid retention and long-term performance and durability.
Transmission fluid lubricates internal transmission components. During operation, the extreme pressure between gear teeth creates heat, and transmission fluid also cools the transmission. The fluid’s cooling function is essential on automatic transmissions, because in addition to gear pressure, the friction in clutches and bands creates heat, and therefore vehicles with automatics are equipped with external fluid coolers to transfer heat from the fluid to the air passing through the cooler. But in addition to cooling, transmission fluid has another indispensable function on an automatic transmission because it is the medium that provides the hydraulic force for transmission operation. Low fluid level due to a leak could cause reduced lubrication and cooling capabilities, resulting in accelerated wear and overheating, but it could also cause poor performance and damage from reduced hydraulic pressure and clutch and band slippage.
Common manual transmission leak points include the case-to-extension housing gasket, side cover gasket, shift lever seals, input shaft seal, input shaft bearing retainer gasket, and speedometer gear housing O-ring. Automatic transmissions can leak at the fluid cooler line connections, line and governor pressure plugs, case-to-extension housing gasket, oil pump seal, oil pump-to-transmission case seal, dipstick tube seal, governor cover, servo cover, manual shaft seal, vacuum modulator O-ring, and throttle valve cable seal, but one of the most common leak areas is the transmission fluid pan. The extension housing seal is another commonplace source of a leak on both manual and automatic transmissions, as are the axle shaft seals on manual and automatic transaxles.
Some points to consider when attempting to repair a leak: Some shafts are supported by bushings to stabilize the shaft during operation and prevent excessive play and vibration. If the bushing is worn, installing a new seal may not fix the leak. An extension housing seal that prevents fluid from leaking past the driveshaft slip yoke is an example. If the extension housing bushing is worn, the slip yoke may not be centered in the bore, making it difficult or impossible for the seal to do its job. The extension housing bushing must be replaced along with the seal. Also, some shafts can become worn and grooved from long-term seal contact, and again, merely installing a new seal most likely won’t repair a leak. We offer a variety of repair sleeves. The sleeve is thin yet strong and is a press fit installation over the shaft. When it’s in place the seal lip has a smooth surface to contact for proper lubricant retention.
The source of a transmission leak may be difficult to locate. Begin by making sure what’s leaking is transmission fluid. Automatic transmission fluid is red when it’s fresh but darkens with use. Manual transmission fluid can be red or dark brown, since depending on year and model, the vehicle manufacturer may specify automatic transmission fluid or gear oil. If a careful visual inspection doesn’t reveal the source of a leak, clean the exterior of the transmission with a suitable degreaser, then operate the vehicle and again check for leaks. If the leak is still not evident, add fluorescent dye to the transmission fluid, then run the vehicle to mix the dye with the fluid. The dye will leak along with the fluid and be visible with UV light. We can supply you with the dye and a leak detection flashlight.
No matter what kind of vehicle or transmission you’re working on, we have the replacement transmission seals, gaskets & O-rings to make your gearbox leak free. However, automatic transmissions require more than external sealing. To develop the proper amount of hydraulic pressure for optimal shifting and transmission performance, a variety of gaskets, seals and O-rings are required for internal transmission components and you’ll find them all here on our digital shelves. All our transmission seals, gaskets and O-rings are manufactured according to original equipment specifications, so when service is completed you can count on the performance and reliability your vehicle was designed to deliver.
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Related Categories
- Clutch Kits
- Automatic Transmission Oil Coolers
- Transmission Mounts
- Transmission Solenoids, Sensors, Switches & Control Units
- Transmission Filters
- Automatic Transmission Torque Converters
- Transmission Shifters
- Clutch Flywheels
- Transmission Pans, Drain Plugs, Filler Caps
- Clutch Hydraulics
- Transmission Rebuild Kits
- Clutch Linkages
- Clutch Release Bearings
- Automatic Transmission Valve Bodies
- Transmission Bearings
- Automatic Transmission Flexplates
- Automatic Transmission Oil Pumps
- Transmission Shafts & Gears
- AT Bands & Clutches
- Automatic Transmission Governors, Modulators
- MT Assemblies
- Automatic Transmission Assemblies
- Clutch Pressure Plates
- Clutch Discs
- Transmission Fluids, Oils & Additives