Description
When you’re pulling a loaded manure spreader up a muddy hill or trying to get traction in wet fields, you need every wheel pulling its weight. This 21-spline gearbox coupling is what makes that happen—it’s the critical link between your transmission and front axle that gives you the four-wheel drive power to get the job done when conditions get tough.
What You’re Getting
- 21 precision-cut splines distribute torque loads evenly to prevent stripping under heavy use
- Heavy-duty construction handles the massive torque loads from pulling heavy implements
- Heat-treated steel construction resists wear and maintains tight tolerances season after season
- Direct replacement design slides right into place without modifications
- Works with studs QTP-52049 for complete assembly
Built for Real Farm Work
This coupling connects your transfer gearbox to the front axle driveshaft in IHC tractors with mechanical front-wheel drive systems. Whether you’re running a Case IH working livestock operations or an older International pulling tillage equipment through challenging terrain, this coupling ensures reliable power transfer to your front wheels. The 21-spline design provides multiple contact points that distribute the torque loads your tractor generates when you’re working steep slopes or pushing through heavy, wet soil.
Made to Last
Farm work puts extreme stress on drivetrain components, especially when you engage 4WD under load. This coupling is engineered with heat-treated steel that maintains its precision-machined tolerances despite exposure to dirt, moisture, and temperature extremes. The splines resist deformation that would cause slippage, ensuring smooth power transfer throughout the coupling’s service life.
Good to Know
Installation requires accessing the transfer gearbox area, so plan on removing shields or covers to get to it. The coupling should slide onto the splined shafts with firm hand pressure—never force it with a hammer as that’ll damage the splines. Make sure everything’s properly aligned before assembly to prevent binding and premature wear. If your 4WD system has been making grinding noises or slipping under load, this coupling might be the culprit.
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