Transmission Main Shaft for Ford New Holland 5000 Series and 6600 Series Tractors

Description

When your Ford tractor’s transmission starts grinding, slipping between gears, or just won’t hold power like it used to, a worn main shaft is often the culprit. This critical component transfers all that engine power through the transmission to your wheels—and after thousands of hours of hard farm work, the splines and gear teeth take a beating. These workhorses are still running strong on farms everywhere, handling everything from loader work and field cultivation to hauling heavy loads down the road.

What You’re Getting

• Heavy-duty main shaft with 30 external teeth and 18 internal teeth configuration
• Internal O-ring groove for proper sealing and lubrication
• Precision-machined splines that mesh perfectly with your transmission gears
• Built to handle the torque loads from your Ford’s engine without twisting or breaking
• Direct replacement that fits like the original—no modifications needed

Built for Real Farm Work

This shaft is engineered specifically for Ford’s reliable transmission designs found in everything from compact utility work to heavy field operations. These versatile workhorses handle essential farming tasks including soil preparation, planting, cultivation, harvesting, and livestock operations. Whether you’re running a 5000 series for hay and livestock duties or pushing a 6600 through heavy tillage work, this main shaft keeps the power flowing smoothly from engine to wheels.

Made to Last

The gear teeth are properly hardened to resist wear from constant meshing under load, while the precision manufacturing ensures smooth operation season after season. Precision-engineered components ensure long service life in demanding farm conditions, and the internal O-ring groove maintains proper lubrication flow to prevent premature wear.

Good to Know

This is a major transmission repair that requires splitting the tractor and complete disassembly of the transmission case. It’s definitely a winter shop project, not a quick field fix. Check your transmission oil level regularly—low oil causes hard shifting that puts extra stress on internal components. When you’re in there, it’s smart to inspect all the related gears, bearings, and seals since they all work together.