- Advanced Clutch Technology (ACT)
 - Produces high-performance clutch components for import and domestic vehicles. - Allison Transmission
- Designs and manufactures medium and heavy duty electronically controlled automatic transmissions.
- Autodyne
- Offering rebuild kits, with downloads for Jaguar and Corvette conversions.
- BorgWarner
- OEM and aftermarket manufacture of one way clutches and plates.
- Clutch Masters
- Manufacturer of specialised clutch rebuilding equipment and tooling. Also manufactures a full line of clutch products, including high-performance units.
- Clutch Specialties
- Manufacturer and supplier of stock, high performance, and industrial grade clutches for autos, trucks, and equipment
- Fidanza Flywheel & Performance Parts
- Fidanza specialises in light weight flywheels, clutch kits, cam gears, short shifters, and other performance parts.
- Lentech Automatics
- High performance automatic transmissions for street and strip.
- Lovejoy, Inc.
- Producer of power transmission components, including all types of couplings.
- ProTorque
- Full line of custom built torque converters ranging from overdrives to unique foreign applications to the impossible antique.
- Quaife USA
- Manufactures automatic torque biasing differentials for added traction.
- Raybestos
- Develops friction material products.
- Raybestos Aftermarket Products Company
- Developer of friction material products for the automotive, truck and bus, and off-highway markets.
- Raytech
- Manufacturer and marketer of speciality engineered polymer matrix composites used in wet and dry clutch, power transmission, and brake systems.
- RebuiltTransmissions.com
- Offering both manual and automatic transmissions.
- Richmond Gear
- Manufacturer of ring and pinion sets, transmissions, and more.
- RPS Turbo Clutch
- Manufacturers of performance clutches and aftermarket racing clutch systems for import and domestic vehicles.
- Sonnax Industries, Inc.
- Parts for torque converters, friction paper with bonding service and component parts for automotive, Allison, motorcycle and high performance racing powerglide transmissions.
- Transmission Exchange Co
- Transmissions and transmission parts for automotive, truck and industrial applications since 1952.
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