If you’re looking for a solid manual transmission that won’t let you down, the Zumbrota Drivetrain Manual Transmission might just be what you need. These units are rebuilt with a level of care that’s hard to come by these days. They go through a rigorous three-step inspection process that ensures you’re getting a product that’s ready to tackle whatever you throw at it.

First off, they kick things off with a pre-inspection that checks for case cracks and excessive wear—basically, they’re looking for any red flags that could cause headaches down the line. Then, they measure all the component parts to make sure they meet OEM specifications. This isn’t just a box-ticking exercise; it’s about making sure everything fits together just right. Finally, each unit undergoes a thorough quality check to ensure it meets Zumbrota’s exacting standards. They really put the gear wear, shaft straightness, and synchronizers through their paces.

What’s more, they replace all the seals and dyno-test each unit to ensure smooth operation, shiftability, and keep noise levels in check. It’s all about precision and reliability at those critical touchpoints. And let’s not forget about the exclusive hydro-blast rinse and sandblasting procedure they use on both the internal and external parts. This is followed by a proprietary deep cleaning process that sets a high bar for manual transmission remanufacturing.

When you pick up one of these transmissions, you’re also getting a 2-year unlimited mileage warranty. That’s peace of mind right there.

• Designed to fit Ford F250/350/450/550 Super Duty Pickups
• 5.79-0.72 gear ratio for optimal performance
• Pre-inspection checks to catch any case cracks or excessive wear
• Three quality inspections throughout the remanufacturing process
• Dyno-tested under real-life scenarios to ensure reliability
• 100% inspection of internal parts, including gear wear and mainshaft straightness
• A final post-build inspection ensures adherence to strict quality standards
• Second inspection during the reman process to verify OEM specifications

• Ford F-250 Super Duty RWD 1999-2000
• Ford F-350 Super Duty RWD 1999-2000
• Ford F-450 Super Duty 4 X 2 1999-2000
• Ford F-550 Super Duty 4 X 2 1999-2000

In short, if you’re in the market for a reliable manual transmission that’s built to last, the Zumbrota S6-S650F 6-Speed Manual Transmission for Ford F-Series 7.3L 2WD from 1999-2000 is a solid choice. It’s got the specs and the quality checks to back it up.