J.W. Performance Transmissions Parts and Accessories

For over three decades, JW Performance has been manufacturing transmission components for the automotive aftermarket. Founded in a small Florida garage, JW Performance...

For over three decades, JW Performance has been manufacturing transmission components for the automotive aftermarket. Founded in a small Florida garage, JW Performance has transformed into a 40,000 square foot warehouse that manufactures innovative products, including The Wheel flexplates and Ultra-Bell housings. We carry a complete line of JW Performance flexplates, torque converters, bellhousings, tailhousings, intake manifolds, and reference books. Bolt some time-tested and race-proven performance onto your vehicle with JW Performance products!

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Results 1 - 24 of 32

J.W. Performance Ultra-Bell Bellhousings

Using the latest technology, J.W. Performance has come up with these Ultra-Bell bellhousings. Built rugged and certified, these flexplate shields allow for special motor and transmission combinations to be easily mated together. Manufactured from one-piece cast aluminum, these Ultra-Bells are five times stronger than stock bellhousings, which makes them capable of withstanding even the most severe tire shake and can fit under most stock floorboards. Order the Ultra-Bell bellhousing designed to fit your application.

4.63 out of 5 stars ( 79 )

$469.88

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$817.57

J.W. Performance The Wheel Flexplates

The Wheel precision-machined flexplates from J.W. Performance feature double-welded, high-quality ring gear and the highest quality steel centers. They are designed to take the punishment of today's high-horsepower revving motors from street to ProMod applications. All of J.W.'s flexplates are SFI-certified and have a replaceable ring gear. They're available in a heavyweight style for quicker launches and more rpm during the shift, or in a lightweight style for faster turbo spool time and improved engine response in street, Circle Track, and road race applications.

4.18 out of 5 stars ( 33 )

$379.50

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$433.86

J.W. Performance Crankshaft Adapter Sleeves

J.W. Performance crankshaft adapter sleeves allow you to fit a transmission from another make into your crankshaft pilot. They're manufactured from high-quality steel and easily insert into the end of your crankshaft pilot with no modifications. These sleeves are available in different styles and sizes for specific applications (such as: adapting Ford engines to GM torque converters; or adapting Mopar Hemi Gen III engines to GM torque converters). Don't risk damaging the input shaft of your transmission—get ready for the track with J.W. Performance crankshaft adapter sleeves.

4.29 out of 5 stars ( 7 )

$52.46

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$134.33

J.W. Performance TH400 Kickdown Wire Connectors

J.W. Performance offers a variety of transmission wiring accessories, including TH400 kickdown wire connectors. These replacement one-prong solenoid switch connectors are manufactured to factory specs to ensure proper fitment and long-lasting performance.

3.0 out of 5 stars ( 1 )

$26.84

J.W. Performance How to Build a Powerglide

J.W. Performance "How to build a Powerglide" books are perfect for the novice or experienced builder. With over 170 pages of detailed explanations and pictures, these books are sure to help you out.

5.0 out of 5 stars ( 1 )

$53.66

J.W. Performance Short Overhaul Kits

J.W. Performance short overhaul kits offer reliability. The best time to rebuild is before there's a problem. Their short rebuild kits provide premium gaskets and seals to keep your transmission shifting smoothly. Are you ready for a rebuild? J.W. Performance short overhaul kits ensure performance and a long service life.

5.0 out of 5 stars ( 1 )

$98.55

J.W. Performance Transmission Bellhousing Bolts

J.W. Performance transmission bellhousing bolts are designed to mount your J.W. Ultra-Bell to your TH350 or TH 400 front pump. The steel bolts are cadmium plated and are the correct length needed to fit your application. They install with simple hand tools.

5.0 out of 5 stars ( 7 )

$26.87

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$30.38

J.W. Performance Flexplate Adapter Kits

J.W. Performance flexplate adapter kits are designed to fit your engine's crankshaft and allow for the use of a GM TH400, TH350, or a Powerglide transmission. They're ideal for drag race, Circle Track, or other forms of motorsports that rely heavily on automatic transmissions. Components are made from steel and include the longer Grade 8 mounting bolts to install your new flexplate. Order the adapter kit recommended for your application.

5.0 out of 5 stars ( 2 )

$82.22

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$116.10

J.W. Performance Ultra-Case Powerglide Transmission Cases

Strength and rigidity are the keys to any foundation, which is why J.W. Performance developed the Powerglide transmission Ultra-Cases. Most engine builders would not build a high-horsepower race engine in a stock block, so why build a race Powerglide with a stock case? These all-aluminum Ultra-Cases are the strongest and most rigid foundations available for building your Powerglide. Designed to be used with the J.W. Performance Ultra-Bells, these cases are loaded with benefits, including improved oil passages, an adjustable trans-brake release, increased material thickness in critical areas eliminating case breakage, and they fit under stock floors. J.W. Performance Ultra-Case Powerglide transmission cases are SFI-certified, so there is no need for an external transmission shield.

Not Yet Reviewed

$1,289.93

J.W. Performance Automatic Transmission Racing Fluid

J.W. Performance automatic transmission racing fluid is recommended for precision-built high performance transmissions. It is a full synthetic performance ATF and extremely high-heat tolerant. Order the quantity needed.

5.0 out of 5 stars ( 1 )

$53.99

J.W. Performance Output Shafts

J.W. Performance output shafts were built for serious horsepower applications. They are made of E-4340 triple alloy chromoly steel for deeper hardening, shock and impact resistance, with excellent torque strength. They are a short-style design for dragster-type applications and will require machine work before installation. If you're serious about power and want the best performance from your race car, J.W. Performance output shafts will help you reach that goal.

Not Yet Reviewed

$188.73

J.W. Performance Ultra-Tail Tailhousings

These J.W. Performance Ultra-Tail tailhousings are a great upgrade for any Powerglide transmission. With five times the strength of the stock tailhousing and a roller bearing in the end, these tailhousings greatly reduce output shaft flex and friction. The Ultra-Tails can be used on any stock or aftermarket Powerglide case without the need for a special yoke.

Not Yet Reviewed

$337.35

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$390.30

J.W. Performance Billet Servo Covers

J.W. Performance billet servo covers upgrade your transmission. These beautiful billet aluminum servo covers provide a positive seal for leak protection. Covers may include an O-ring seal, gasket, hardware, and pressure port, depending on the application. J.W. Performance billet servo covers are essential for your transmission.

Not Yet Reviewed

$39.30

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$74.25

J.W. Performance Replacement Trans-Brake Solenoids

J.W. offers replacement components like trans-brake solenoids for your Powerglide trans-brake valve body. Powerglide transmissions are chosen for many forms of competition, and J.W. Performance is at the forefront of that technology. So, when you need to convert energy into force, renew the flux of your trans-brake with a new steel solenoid from J.W. Performance.

5.0 out of 5 stars ( 1 )

$175.23

J.W. Performance Automatic Transmission Clutch Packs

J.W. Performance offers clutch packs for a variety of automatic transmissions—including Powerglide models. These high gear clutches are a popular choice for many forms of competition. They're designed to deliver consistent, trouble-free performance. Order the pack recommended for your vehicle and transmission application.

Not Yet Reviewed

$53.70

J.W. Performance Automatic Transmission Friction Clutches

J.W. Performance offers friction clutches for a variety of automatic transmissions—including Powerglide models. Machined from billet aluminum, these plates provide increased rigidity to minimize leaks at the servo cover. They're designed to meet or exceed stringent industry standards. Order the friction clutch recommended for your vehicle and transmission application.

Not Yet Reviewed

$10.73

J.W. Performance Pin Sets

Make sure you have everything for your next transmission rebuild with these J.W. Performance pin sets. These pin sets are machined to exacting standards and from the best materials to ensure an excellent fit and a durable product. These kits include all-new pins and locking ring. Rebuild your transmission the right way with J.W. Performance and these pin sets.

Not Yet Reviewed

$120.92

J.W. Performance Planetary Gear Housings

J.W. Performance has all of the parts that you need to service and rebuild your planetary gears. These planetary gear housings are available in steel and aluminum versions and ready for you to install your gear set of choice. They are thoroughly inspected and precision welded to make the task of assembling a complete planetary simplre.

Not Yet Reviewed

$133.65

J.W. Performance Billet Gear Pistons

J. W. Performance billet gear pistons offer greatly improved performance and reliability for high-horsepower drag racing. They are manufactured from billet aluminum and are available for different gear positions to help maximize the durability of your automatic transmission.

Not Yet Reviewed

$91.67

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$107.46

J.W. Performance Billet Servo Pistons

J. W. Performance billet servo pistons are designed to help your automatic transmission shift harder and faster. They're manufactured from premium-quality billet aluminum and include O-rings for a direct-fit installation.

Not Yet Reviewed

$36.40

J.W. Performance Automatic Transmissions

J.W. Performance automatic transmissions are offered in a variety of types for various applications. They are made of high-quality materials to exacting specifications and undergo inspections prior to shipment. J. W. Performance manufactures automatic transmissions and component parts for circle track, drag racers, off-road racers, street, and strip enthusiasts.

Not Yet Reviewed

$2,451.76

J.W. Performance Street Lethal TH400 Transmissions

Originally released in 1964, the TH400 has proven again and again to be an ideal racing automatic. From hot rods to Pro-Mods, the TH400 can be built in many combinations. J.W. Performance offers several standard units to choose from. J.W. Performance Street Lethal TH400 transmissions are ideally suited for your pro-street or pro-tour application. They are assembled with quality performance clutches and steels to ensure longevity and multiple valve body choices are available to give you the options you need. Choose the one preferred for your project.

Not Yet Reviewed

$3,454.74

J.W. Performance Sportsman Torque Converters

These Sportsman torque converters are designed for hot street cars and bracket racers. These custom-built converters feature high-quality components and offer the biggest bang for your buck in the entire converter market!

Not Yet Reviewed

$616.28

J.W. Performance Trans-Brake Valve Bodies

Are you looking for harder launches and better ETs? J.W. Performance can help you get there with these trans-brake valve bodies. These valve bodies have been fully developed and built by J.W. to be the best, strongest, and most reliable trans-brakes on the market today. J.W. Performance offers these trans-brake valve bodies for a wide variety of today's most popular racing transmissions. Don't leave anything on the table at your next race--step up to one of these J.W. Performance trans-brakes and take full advantage of your race car's ability.

Not Yet Reviewed

$607.37

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$700.65

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