Manual Transmission Components

Manual Transmission Parts for Rebuilds and Repairs

You'll find the internal manual transmission parts you need to rebuild a worn gearbox or fix a single failed component here. This category sits within our full lineup of manual transmissions, so you can shop loose parts and complete units in one place. Common manual transmission components include:

• Manual trans gears, cluster gears and main shafts
• Input shafts and synchro assemblies
• Shift forks, shift levers, shifter plates and shift bushings
• Bearing retainers, bearing/seal overhaul kits and gasket sets
• Extension housing bushings, clutch pilot bearings, clutch forks and boots

If you're putting together your own manual transmission rebuild kit, start with an overhaul kit and gasket set. Then add synchros, shafts or shift forks based on the wear you find at teardown. For the parts that connect your hand to the gearbox, shop manual transmission shifter components to replace worn levers, bushings and linkage hardware.

Remanufactured Manual Transmissions for Trucks and Jeeps

A remanufactured manual transmission is the faster fix when your gearbox needs more than a few parts. Instead of sourcing internals and rebuilding the case yourself, you get a complete unit that's ready to bolt in. Zumbrota remanufactured transmissions cover many popular truck and Jeep applications, including:

• NV4500 transmissions for GM and Dodge trucks
• AX5 and AX15 transmissions for 1987-1991 Jeep Wrangler
• NSG370 transmissions for Jeep Liberty, Wrangler, Nitro and Chrysler Crossfire
• Ford M5R2, S5-42, S5-47 and S6-750F transmissions for F-Series trucks
• G56 transmissions for 2005-up Ram 5.7L trucks

You can also shop ATK Engines transmissions in this category. A complete unit makes sense for heavy-duty trucks and daily drivers that can't sit in the garage during a long rebuild. Confirm your transmission model and vehicle fitment before you order, and plan to replace the clutch at the same time.

Transmission Swap Kits and Overdrive Upgrades

A transmission swap kit lets you add a modern manual gearbox, often with overdrive, to a vehicle that never had one. Silver Sport Transmissions EasyFit Transmission and Installation Kits are built for 1955-1962 Corvette C1, 1955-1957 Tri-Five Bel Air, 1963-1972 Chevy C10, 1984-1988 Corvette C4 and 1965-1967 GM X-Body applications. These kits pair the transmission with the installation parts the swap needs.

If you want a 5-speed with overdrive for a GM project, look at the Richmond Gear Super Street 5-Speed Transmission with Overdrive. You can also browse Tremec manual transmissions for performance builds. An overdrive gear drops cruising rpm, which helps on long highway drives.

Already running a 5-speed? Read our guide to upgrading a T5 transmission. For older vehicles, our article on putting a new transmission in a classic car covers what to plan for.

Clutch, Flywheel and Bellhousing Components

Your clutch and flywheel transfer engine power to the transmission, so they need to match your gearbox and your power level. When you rebuild or swap a manual transmission, it's a good time to replace these parts too. Shop clutches and clutch kits to get a disc, pressure plate and related hardware that work together.

Next, pick from our manual transmission flywheels to match your clutch and engine. If you're swapping transmissions, you may also need one of our transmission bellhousings to mate the gearbox to your engine block. Flywheel weight changes how quickly the engine revs and how smoothly you launch.

For street and strip builds, McLeod and Centerforce clutch kits are available for many applications. Not sure what clamping force or disc material you need? Our guide on how to choose a performance clutch explains the tradeoffs for high-torque engines and daily drivers.

Shifters, Mounts, Fluids and Driveline Connections

A manual transmission only shifts smoothly when the parts around it are in good shape. Start with the shifter, since it controls how every gear change feels. Shop manual transmission shifters to replace a sloppy factory unit, or browse Hurst shifters for your build.

Worn mounts let the transmission move under load, which can affect shift feel and linkage alignment. Our transmission mounts and adapters help you secure a stock gearbox or fit a swapped one. Fresh fluid matters too, so stock up on gear oils or transmission fluids and additives to match your transmission's spec.

Behind the transmission, shop driveshafts and components to send power to the rear axle. If your car uses a hydraulic clutch, our guide to checking and changing hydraulic clutch fluid walks you through the job. Check U-joints and yokes while you're under the car, since worn joints can cause vibration you might blame on the transmission.