Frequently Asked Questions About International ProStar Transmission Coolers

What years and engine configurations are these transmission coolers compatible with?

Our International ProStar transmission coolers are designed to fit 2008-2017 ProStar models. However, compatibility varies based on your specific engine type (MaxxForce, Cummins ISX, or Caterpillar) and transmission model. Coolers for automatic transmissions typically have different fittings and capacities than manual transmission models. We recommend checking your VIN or calling our tech support at 1-888-875-7787 with your truck's specifications to ensure proper fitment.

How difficult is the installation process, and what tools are required?

Installation typically takes 2-4 hours for experienced mechanics. You'll need basic hand tools, including wrenches (typically 13mm-19mm), a drain pan for transmission fluid, and new transmission fluid. The most challenging aspects reported by customers include accessing mounting bolts in tight spaces near the frame rails and properly routing the cooler lines without kinking. Some models may require removing the front bumper or grille for easier access. Professional installation is recommended if you're not comfortable working with transmission systems.

What's the difference between OEM and aftermarket coolers in terms of cooling capacity?

Aftermarket heavy-duty coolers typically offer 20-30% better cooling capacity than stock OEM units, featuring additional cooling fins and larger core sizes. OEM coolers are adequate for standard highway driving, but drivers who haul heavy loads, operate in mountainous terrain, or experience frequent stop-and-go traffic often benefit from upgraded coolers. Look for coolers with aluminum cores and reinforced tanks, as these provide better heat dissipation and durability compared to plastic-tanked OEM units.

How do I know if my transmission cooler needs replacement?

Common signs include transmission fluid in your coolant (appears as a strawberry milkshake color), coolant in your transmission fluid, transmission overheating warnings, slipping gears, or visible leaks around cooler connections. Physical damage like bent fins, corrosion, or impact damage also warrant replacement. Regular drivers should inspect their coolers during oil changes, while heavy-haul operators should check monthly. Preventive replacement every 300,000-400,000 miles is recommended for high-mileage trucks.

Are auxiliary coolers worth adding to my ProStar?

Auxiliary coolers are highly recommended for ProStars used in severe-duty applications, including heavy hauling over 70,000 lbs, frequent mountain driving, or operating in ambient temperatures above 90?F. Adding an auxiliary cooler can reduce transmission temperatures by 20-40?F, significantly extending transmission life. Installation involves mounting the auxiliary unit in series with your existing cooler and typically costs $300-500 in parts. The investment often pays for itself by preventing costly transmission repairs.