Frequently Asked Questions About Kenworth T600 Transmission Coolers

Will these transmission coolers fit my specific year Kenworth T600?

Most aftermarket transmission coolers are designed to fit Kenworth T600 models from 1987-2007. However, there can be variations based on your engine configuration and existing cooling system setup. We recommend checking your current cooler's dimensions and mounting points, or contact us with your VIN for exact fitment verification. Pre-2000 models may require different mounting brackets than 2000-2007 models.

What size transmission cooler do I need for heavy hauling or mountain driving?

For heavy-duty applications like hauling 80,000+ lbs or frequent mountain driving, we recommend upgrading to a cooler with at least 40,000 BTU capacity or a dual-pass design. Standard coolers typically range from 20,000-30,000 BTU, which may not provide adequate cooling under extreme conditions. Consider adding an auxiliary cooler if you frequently operate in temperatures above 90 degrees or pull heavy loads through steep grades.

Can I install a transmission cooler myself, and what tools will I need?

Installation typically takes 2-4 hours for someone with basic mechanical skills. You'll need standard hand tools, transmission line wrenches (usually 5/8" and 3/4"), a drain pan, and approximately 2-3 quarts of transmission fluid for refill. The most challenging part is usually routing the lines properly and ensuring clearance from moving parts. Some installations may require cutting and flaring new lines if the cooler dimensions differ significantly from stock.

Are aluminum or copper/brass coolers better for my T600?

Both materials work well, but each has trade-offs. Aluminum coolers are lighter (typically 5-8 lbs vs 12-15 lbs for copper/brass) and resist corrosion better in road salt conditions. Copper/brass units generally offer better heat dissipation and are easier to repair if damaged. For most applications, a quality aluminum cooler with adequate BTU rating will perform excellently and last the life of your truck with proper maintenance.

How do I know if my current transmission cooler is failing?

Common signs include transmission fluid temperatures consistently above 200 degrees during normal operation, fluid leaks around cooler connections, visible damage or corrosion on cooler fins, or transmission slipping under load. You can also check for internal blockage by feeling the temperature difference between inlet and outlet lines - they should have a noticeable temperature drop of 20-40 degrees. If your transmission fluid appears milky or foamy, this indicates coolant contamination requiring immediate cooler replacement.