Transmissions & Transmission Parts

Meziere True Billet Flexplates

Meziere true billet flexplates are the superior choice for quality and precision. These key engine components are machined to exacting tolerances from 4340 round bar steel. Meziere's proprietary manufacturing process ensures the strongest gear teeth, the least runout, and best longevity on the market. All of the replacement flexplates are certified to at least SFI 29.2, and they're available for fitment on vehicles from 1955 and forward.

4.86 out of 5 stars ( 21 )

$495.77

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$689.10

FTI Performance SRL Series Billet Lockup Torque Converters

FTI Performance SRL Series billet lockup torque converters feature a computer-designed, CNC-machined billet front cover and a billet lockup piston--making premature clutch wear a thing of the past. With custom stator designs and multiple blade angle pumps, stalls are available from 2,800-4,400 rpm. They are custom-built to your exact needs and driving style. With furnace-brazed and heli-welded fins, severe-duty sprague, and anti-ballooning flanged impeller hub, these torque converters are virtually indestructible.

4.06 out of 5 stars ( 18 )

$989.00

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$1,895.00

RAM Billet Steel Flywheels

Cast flywheels are not explosion-proof and can be dangerous when used in high performance applications at higher rpm. RAM billet steel flywheels are recommended as replacements for factory-cast flywheels in high performance and racing vehicles. Made in America and produced in-house, all RAM flywheels are computer balanced within a 1/2 oz., surface ground (which results an optimum mating surface), and are ready to run out of the box. They're better for launching heavier drag race cars and provide better drivability in street vehicles. SFI-approved, RAM billet steel flywheels are CNC-machined from certified materials. Order the model recommended for your year/make and engine application. Technical note: As they spin, heavy flywheels store more energy than lighter ones. Engine and gearing combinations that require more power or inertia to make the car launch without bogging the motor need heavier flywheels. However, heavier flywheels accelerate slower. Lighter flywheels create less inertia at launch, but accelerate quicker through the gears. When choosing a flywheel, you must consider the car's weight, operating rpm of the engine, and, most importantly, the gearing. Insufficient gearing will cause an engine with too light of a flywheel to "bog" on launch.

4.71 out of 5 stars ( 136 )

$249.00

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$485.00

Summit Racing™ Billet Steel Flywheels

Grab one of these race-ready Summit™ billet steel flywheels for the durability and performance that you demand at a great price! They are able to withstand the severe abuse of high-rpm racing in heavy drag cars and are SFI 1.1 approved. Most of our precision-balanced Summit Racing™ billet steel flywheels are drilled for both Borg & Beck and Long-style clutch assemblies.

4.52 out of 5 stars ( 54 )

$263.99

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$314.99

FTI Performance SRL-3 Series Billet Triple Clutch Torque Converters

FTI Performance SRL-3 Series billet triple clutch torque converters are designed for engines with some serious power! They're engineered to be locked up under full throttle and can withstand some abuse. The billet lockup piston, triple bearings, and anti-ballooning impeller hub are designed to get the job done. These converters are available in different stall torque ratios and stall ratings to match your engine and transmission combination.

3.86 out of 5 stars ( 7 )

$1,299.00

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$1,429.00

Summit Racing™ Billet Aluminum Trans-Brake Valve Bodies

Don't leave anything on the table at your next race! Step up to a Summit Racing™ billet aluminum trans-brake valve body—and take full advantage of your race car's ability. These automatic transmission units are lighter than OEM steel versions; and their solid design is more rigid than veined factory models, improving strength. Summit™ valve bodies also omit the unnecessary fluid channels found in OE-style units, providing a more direct fluid path. This improves trans-brake performance and shift quality. Increase your transmission performance with the billet aluminum trans-brake valve body recommended for your application. Other benefits: * Achieve maximum torque converter stall * Quicker and more consistent reaction times and 60 ft. times * Prevents engine torque load from transmitting thru drivetrain prior to launch * Trans-brakes perform in much the same way as a manual clutch

4.56 out of 5 stars ( 9 )

$535.99

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$544.99

FTI Performance Billet Input Shafts

FTI Performance billet input shafts are specially engineered for high-horsepower engines equipped with GM 4L80E/4L85E transmissions. They're constructed from hardened, aircraft-quality 300M billet steel for added strength and lubrication holes for increased flow and strength. These ultra-durable components feature a resized diameter to provide optimum stress distribution along the entire length of the shaft, and along the extended high gear splines to the oil ring. FTI Performance billet input shafts are stronger than OE, making them a necessary component for pro-street and off-road applications. For high performance components and excellent workmanship, put your trust in FTI Performance parts.

2.33 out of 5 stars ( 3 )

$309.00

Summit Racing™ Billet SFI-Approved Flexplates

Our Summit Racing™ Billet SFI approved flexplates are built for racing. They are thicker than stock and designed for strength, durability, and fitment. Summit Racing™ Billet SFI approved flexplates are the superior choice for quality and precision.

2.5 out of 5 stars ( 4 )

$381.99

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$434.99

FTI Performance Billet Aluminum Trans-Brake Valve Bodies

In this corner, weighing in at a svelte 8.2 lbs., are FTI Performance billet aluminum trans-brake valve bodies. These lightweight wonders are so quick, you'll need to add time to your delay box. To eliminate inconsistencies from steel valves in aluminum cavities, FTI uses an adjustable regulator with a steel regulator valve and valve bore. Think safety and include a trans-brake lockout system (not included), preventing accidental engagement during motion. For guaranteed stoppage and incredibly quick release times, buy FTI Performance billet aluminum trans-brake valve bodies.

4.0 out of 5 stars ( 4 )

$499.00

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$589.00

RAM Billet Aluminum Flywheels

If you're building an all-out competition car, then you need a lightweight flywheel that will allow the engine to rev quicker and not eat up a lot of power. RAM billet aluminum flywheels greatly reduce rotating weight to permit quicker revving and higher power output, but still retain enough mass to resist heat distortion that could adversely affect clutch performance. RAM billet aluminum flywheels are made in America and produced in house. All RAM flywheels are computer-balanced within a 1/2 oz., surface ground (which results an optimum mating surface), and are ready to run out of the box. SFI-approved, these flywheels are CNC-machined from certified materials and have rugged steel friction-surface inserts. RAM's billet aluminum flywheels feature a 1/4 in. thick friction insert to dissipate heat away without distortion. Technical note: As it spins, a heavy flywheel stores more energy than a lighter one. Engine and gearing combinations that require more power or inertia to make the car launch without bogging the motor need heavier flywheels. However, heavier flywheels accelerate slower. Lighter flywheels create less inertia at launch, but accelerate quicker through the gears. To effectively use a lighter flywheel, you must consider the car's weight, operating rpm of the engine, and, most importantly, the gearing. Too little gear will cause the engine to 'bog' on launch.

4.77 out of 5 stars ( 31 )

$339.00

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$519.00

Centerforce Billet Steel Flywheels

Centerforce billet steel flywheels are available for popular import and domestic vehicles, including trucks. They're CAD/CAM-designed and CNC-machined from billet steel for precise, no-hassle, bolt-in installations. No modifications are required in combination with either Centerforce clutches or other clutch assemblies built to OEM specs. These rugged flywheels are SFI-approved, so you know that you can count on them--on the street and on the track.

4.5 out of 5 stars ( 62 )

$329.95

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$608.95

Fidanza Billet Aluminum Flywheels

Fidanza billet aluminum flywheels feature excellent heat dissipation and weight reduction. The replaceable friction surface is machined from 1045 steel and attached with military-grade aerospace fasteners. These flywheels are manufactured from the highest quality 6061-T6 billet aluminum and feature a 1050 heat-treated steel ring gear that's pressed on and secured with Grade 8 button screws. They also use a stepped dowel system so that when the parts are installed they're locked into place. No chromoly can compete with the awesome serviceability, strength, and superior design of Fidanza billet aluminum flywheels—available in nearly 200 models and options for applications from the 1940s and up.

4.71 out of 5 stars ( 35 )

$262.49

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$969.14

Eddie Motorsports Billet Clutch Reservoirs

Eddie Motorsports billet clutch reservoirs are manufactured from 6061 T-6 aluminum, and include bracket for easy mounting on your car's firewall or other easy-to-access location. The bracket is predrilled for easier mounting, and the reservoir has a 4 oz. capacity and comes with an aluminum 5/16 in. barbed fitting. Eddie Motorsports billet clutch reservoirs are available in raw machined or bright polished finishes, as well as black or clear anodized.

2.5 out of 5 stars ( 2 )

$176.95

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$199.95

RevMax Billet High Performance Towing/HD Valve Bodies

RevMax billet high performance towing/HD valve bodies for a variety of applications, including many Dodge and Ram trucks from the early 2000s and up. The V2.0 is 1 in. thick, but this new version has precision cutouts that allow the use of a stock filter and pan. Unlike other designs, full depth worm tracks in crucial circuits are included. Other competing designs have only a .190 in. deep worm track in several critical circuits. One restricted circuit is the combined vent track, responsible for all venting operations and in particular the problematic SSV valve. The next restricted circuit is the torque converter clutch signal circuit. Restrictions in this circuit create all kinds of torque converter related concerns, including dragging when coming to a stop, overheating, soft or harsh TCC apply or release, and back feed issues resulting in P1776 and P0871 trouble codes. Both the original and V2.0 have nearly full depth worm tracks in these areas which eliminate problem issues! The V2.0 plate will work with ANY aftermarket transmission pan, as well as with stock transmission pans. There is no need to alter any part of the pan or use special filters. Just install it like you would a stock channel plate and go. Order the model recommended for your year/make and transmission application. The RevMax 68RFE V2.0 ZeroFlex billet valve body features the following: * 6061 billet aluminum construction * Deep critical worm tracks * .0003 flatness across the entire plate. The only truly flat billet channel plate! * Micro-polished worm track surface. There are no visible or perceptible machining marks or stepovers. This ensures no chance of any leaking due to machining marks * Large radius machining on the filter cutout increases rigidity yet allows the use of a stock filter assembly * Angle milled step downs increase rigidity in problematic flexing areas * Ability to run up to 325 psi of line pressure without any warpage! (transmission tuning, TCM upgrade or pressure box is needed) * No pump modifications required for up to 250 psi * Proprietary worm track layout * Shortened shift times for crisp, clean shifts * Upgraded valve body to case seals * Billet steel SSV solenoid switch valve and end plugs * Revmax triple double 3/2 billet accumulator pistons with dual seals * Upgraded grade 8 custom fasteners * Upgraded steel accumulator housing plate that is 3x thicker than stock * RevMax proprietary accumulator springs for improved 3-4 shift feel * RevMax proprietary separator plate with the bonded gasket that eliminates cross leaks and warpage issues * Revmax proprietary upgrades * Mounting surface verified and flat filed * Threads checked and repaired if needed * Computerized testing on state-of-the-art $125k valve body test machines

5.0 out of 5 stars ( 4 )

$1,399.00

ICT Billet Flexplates

ICT Billet offers LT LSA swap flexplates for 8-bolt GM crankshafts. They're compatible with Gen 5 LT Series engines and LSA engines. Each kit includes a steel flexplate and eight heavy-duty Grade 12.9 flexplate bolts. These flexplates are also compatible with 10.5 in., 10.75 in., 11.06 in., and 11.5 in. 6-bolt torque converter bolt patterns.

5.0 out of 5 stars ( 1 )

$197.99

Sonnax Billet Forward Clutch Pistons

These Sonnax billet forward clutch pistons improve forward clutch piston strength and durability by using billet aluminum—and they're made with additional contours at points of high stress. These rebuild components can be used individually or with Sonnax input housing reinforcement sleeve kits. No alterations or fabrication is needed to use them in conjunction with aluminum overrun pistons. Sonnax billet forward clutch pistons can be used in both early and late model automatic transmissions, as noted in the application.

2.0 out of 5 stars ( 1 )

$101.50

Transmission Specialties Billet Aluminum TH400 Valve Bodies

Transmission Specialties billet aluminum TH400 valve bodies use zero OEM stock parts—everything is brand new! Unlike many production builders, TSI's valve bodies are handcrafted from beginning to end by one highly skilled and experienced technician. This process ensures that you get the highest quality product each and every time. The valve body has undergone over 40 years of contiguous, rigorous R&D and on track testing. For over 40 years, Transmission Specialties has been the trusted name in the performance automatic transmission industry. They have pioneered much of the technology that is now commonplace in the transmission marketplace. The inventors of the spragless converter and the aftermarket straight cut Powerglide planetary, TSI is known worldwide for manufacturing the highest quality transmissions and components. Product features: * Billet 6061-T6 main and small valve body construction, no steel * Laser-cut aluminum separator plate * TransGo custom heat treated, USA Made valves * TransGo custom springs * Proprietary hydraulics and worm tracks * Proprietary TransGo Pressure Regulator valve train assembly * Bores are concentric to .0003 in. insuring perfect valve operating * All parts of the valve body are within .001 in. flat and parallel * Micro RA finish ensures zero leaks and maximized fluid movement * Custom bolt pattern eliminates leaks that are common in PG valve bodies * Weighs less than 8 lbs. fully assembled * Ultra-Fast brake release is achieved with our custom hydraulic and plate design * Includes NEW transbrake Solenoid * Includes 17 precision matched reverse release springs * Best fitting and performing valve to bore design in the industry resulting in near perfect vacuum test results * Grade 8 fasteners

Not Yet Reviewed

$563.28

Sonnax Billet Accumulator Pistons

Sonnax billet accumulator pistons feature a stronger piston made from anodized billet aluminum with a dual-seal design. OEM plastic accumulators are prone to breaking and have poor sealing qualities and the metal rings currently offered with aftermarket accumulators also have issues with sealing. Sonnax piston's seals prevent piston-to-bore contact and the D-rings vastly improve sealing compared to aftermarket steel rings.

4.38 out of 5 stars ( 8 )

$47.25

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$121.72

Summit Racing™ Billet Aluminum Flywheels

Grab one of these race-ready Summit billet aluminum flywheels for the durability and performance that you demand at a great price! Ideal for light drag racing and road racing, these flywheels are constructed from high-strength, forged billet aluminum for superior strength. The ring gear is mounted with welded tabs riveted to the flywheel. These precision-balanced flywheels are SFI-1.1 approved and most are drilled for both Borg & Beck and Long-style clutch assemblies.

Not Yet Reviewed

$416.99

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$441.99

ICT Billet LS Flexplate Bolt Sets

ICT Billet LS flexplate bolt sets are high-strength for your high performance applications. The bolts are offered in standard and extended-lengths.

3.88 out of 5 stars ( 8 )

$20.99

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$29.99

ICT Billet Automatic Transmission Adapter Wiring Harnesses

Compatible with GM vehicles originally equipped with LS Series 4L60E transmissions, ICT Billet automatic transmission adapter wiring harnesses are used to retain all appropriate electrical connections to the transmission when converting from 4L60E to 4L80E. Don't allow poor conductivity issues to cause your engine to run poorly. For trouble-free, consistent performance, use ICT Billet adapter wiring harnesses. Features and specs include: * Assembled with OEM tooling, OEM Delphi connector, lock, seals and terminals, and uses OEM harness wire colors for a perfect fit * Supplied VSS connector plugs into front input speed sensor in transmission. Connector from engine harness plugs into rear VSS sensor in transmission. * Contains 1 transmission adapter harness and 1 vehicle speed sensor connector

1.67 out of 5 stars ( 3 )

$144.99

ICT Billet Bellhousing Bolts

ICT offers a wide array of high-quality aftermarket automotive products to meet your specific needs. When you need the right bolts for your engine or transmission swap, ICT Billet bellhousing bolts will provide the proper, secure attachment for your components. They can also be used to replace stripped or missing original equipment bellhousing bolts.

4.27 out of 5 stars ( 22 )

$14.99

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$20.99

ICT Billet Bellhousing Spacers

ICT Billet bellhousing spacers for GM bellhousings are installed between your transmission and bellhousing to gain more space for extra hydraulic clearance. Manufactured from billet aluminum, they will ensure proper clearances are maintained for alignment and smooth operation.

5.0 out of 5 stars ( 27 )

$58.99

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$144.99

FTI Performance Billet Servo Kits

FTI Performance offers billet servo kits to maintain your GM Powerglide automatic transmission. These kits contain assorted components, such as dual ring servo; PTFE servo rings; servo cover, gasket and O-ring; and all hardware.

5.0 out of 5 stars ( 2 )

$65.99