Frequently Asked Questions About International IH Cabover Drivetrain Parts
What years and models of International IH Cabovers are these drivetrain parts compatible with?
Our drivetrain parts primarily fit International IH Cabover models from the 1960s through the early 1990s, including the CO-4000, CO-8190, COF-9670, and Transtar CO series. For exact fitment, we recommend checking the specific part listing or contacting our support team with your OEM number. Many universal joints, carrier bearings, and driveshaft components are interchangeable across multiple model years, but clutch assemblies and transmission parts tend to be more year and engine-specific.
Are aftermarket drivetrain parts reliable compared to OEM, and what brands do you carry?
We stock both OEM-quality aftermarket parts and genuine OEM components when available. Our aftermarket suppliers include trusted brands like Spicer, Meritor, Eaton, and Gates, which often manufacture the original equipment parts. These aftermarket options typically offer 80-90% of OEM longevity at a more affordable price point. For critical components like clutch assemblies or transmission synchronizers, we generally recommend OEM or premium aftermarket brands for maximum reliability.
What are the most common signs that my cabover needs drivetrain work, and which parts typically fail first?
The most frequent drivetrain issues on IH Cabovers include worn carrier bearings (indicated by driveline vibration), failing U-joints (clicking or clunking sounds), and clutch slippage in higher gears. Due to the cab-forward design putting extra stress on driveshaft angles, U-joints and carrier bearings typically need replacement every 150,000-200,000 miles. Clutch life varies greatly based on application but expect 250,000-400,000 miles for highway use. Listen for grinding during shifts, vibrations at specific speeds, or difficulty engaging gears as early warning signs.
Can I install these drivetrain parts myself, or do I need special tools?
Basic components like U-joints and some carrier bearings can be installed with standard shop tools, though a hydraulic press makes the job easier. However, clutch replacements, transmission work, and driveshaft balancing require specialized equipment and expertise. Most DIY mechanics can handle U-joint replacement with a ball joint press or large vise, but proper driveline angle measurement tools are essential for cabover applications. We recommend professional installation for major components to ensure proper alignment and avoid premature wear.
How do I determine the correct driveshaft length and specifications for my IH Cabover?
Driveshaft specifications vary significantly based on wheelbase, suspension type, and transmission choice. The safest method is to measure your existing driveshaft from center of U-joint to center of U-joint at ride height. For custom applications or replacements, you'll need to know your transmission output yoke series (typically 1350 or 1410), differential input yoke type, and the compressed and extended lengths at full suspension travel.
