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Transmission Internal Parts

Inside the Gearbox: NOS Transmission Internal Parts

Rebuilding a vintage transmission is precision work. Whether you are overhauling a Muncie 4-speed or refreshing a Ford C4 Automatic, the quality of the internal components dictates how long that rebuild lasts.

At Old Car Parts NW, we specialize in NOS (New Old Stock) "Hard Parts"—the gears, shafts, and synchronizers that take the abuse.

The NOS Metallurgy Advantage

Why hunt for vintage steel?

  • Hardened Gears: Many modern reproduction cluster gears and input shafts are made of softer steel that pits or whines after a few thousand miles. Our NOS Gears feature the original factory hardening processes for quiet, long-lasting operation.

  • Synchronizers: We stock authentic Brass Blocking Rings and synchro assemblies that grab correctly, fixing that "crunch" when shifting into second gear.

  • Small Parts: From Speedometer Driven Gears (to correct your speed reading) to Kickdown Levers and Modulator Valves, we have the guts to finish your transmission right.

Inventory Includes:

  • Manual Trans: Cluster gears, input/output shafts, reverse idlers, and syncro rings.

  • Automatic Trans: Bands, servos, governors, and valve body parts.

  • Seals & Gaskets: High-quality lip seals and extension housing gaskets.

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