When it comes to manual transmissions, Zumbrota really knows their stuff. These rebuilt units are crafted with care, going through a rigorous three-step inspection process that leaves no stone unturned. First up, they do a pre-inspection to check for any case cracks or excessive wear. This step is crucial because it helps catch those pesky OEM issues that can pop up in older cores. You don't want to end up with a transmission that’s got hidden problems lurking inside.

Next, they dive into measuring all the component parts to ensure they hit those OEM specifications. This isn’t just a quick glance; they really make sure everything is up to snuff. After that, there’s a final post-build inspection that guarantees the unit meets Zumbrota’s strict quality standards. They’re not just slapping these together; they’re making sure each one is built to last.

They don’t stop there, either. Every single internal part gets a thorough inspection, including checking for gear wear, mainshaft straightness, and synchronizer functionality. And just to be extra sure, these transmissions are dyno-tested. They run them through real-life scenarios to make sure they shift smoothly and operate quietly. You want a transmission that works like a dream, and that’s exactly what they deliver.

Plus, all the seals are replaced, so you don’t have to worry about leaks down the line. They even go through a unique hydro-blast rinse and sandblasting process to clean both the inside and outside of the parts. This proprietary shot-enticed deep cleaning is what sets Zumbrota apart in the manual transmission remanufacturing game.

And here’s the cherry on top: all Zumbrota manual transmissions come with a solid 2-year unlimited mileage warranty. That’s peace of mind right there.

• Three thorough inspections during the remanufacturing process.
• Pre-inspection to catch case cracks and excessive wear.
• Second inspection to ensure all parts meet OEM specs.
• Final post-build inspection to meet Zumbrota's strict standards.
• 100% inspection of internal parts, including gear wear, mainshaft straightness, and synchronizer testing.
• Dynamometer tested under real-life scenarios.

• Ford F-250 RWD 1987-1992
• Ford F-350 RWD 1987-1992

So if you’re looking for a reliable manual transmission for your Ford F-250 or F-350 from 1987 to 1992, the Zumbrota S5-42 5-speed is where it’s at. It’s designed to handle the 7.5L and 4.9L engines, and with its solid build quality, you can trust it to keep you on the road without any hiccups.