M5R1 Manual Transmission

The Zumbrota Drivetrain M5R1 Manual Transmission is a remanufactured unit engineered for specific Ford Ranger and Mazda B-Series models from 1991-1994 equipped with the 3.0L engine and 2WD. This transmission boasts an all-aluminum construction for durability and reduced weight. Key features include a top-cover bolt-in shifter lever, no bottom cover, a 4-5/8 inch shifter stub, and a mechanical speedometer drive with a 6-tooth purple gear. The unit also includes one switch on the top cover and aligns with Hollander number 400-02453. Zumbrota Drivetrain emphasizes a rigorous remanufacturing process with three distinct inspection stages. This includes a pre-inspection for case integrity and wear, component measurement against OEM specifications, and a final post-build inspection. Internal parts undergo 100% inspection, verifying gear wear, mainshaft straightness, and synchronizer function. Every transmission is dyno-tested to ensure proper operation, shiftability, and noise levels. To ensure the highest quality and reliability, all seals are replaced, and the units undergo extensive testing. The remanufacturing process includes an exclusive hydro-blast rinse and sandblasting procedure, followed by proprietary deep cleaning, setting a high standard for manual transmission rebuilding.