WOOTON 8-Pass Aluminum Transmission Cooler Kit — 5/16" Line Universal Fit, Compact 12x10 Core for Towing

High-efficiency 8-pass aluminum transmission cooler kit engineered to lower transmission oil temperature for heavy-duty towing and off-road use.

Built for trucks, SUVs and other vehicles with 5/16" (8mm) transmission cooler lines, the WOOTON 8-pass transmission oil cooler reduces heat build-up during sustained loads. Its multi-pass core increases fluid contact area and slows oil flow for better heat dissipation. The kit includes a reinforced hose, mounting hardware and an Insta-dapt adapter to simplify installation on compatible GM 4L60E/4L80E systems and many other models.

How does an 8-pass cooler differ from single- or dual-pass designs?

An 8-pass cooler routes fluid through the core eight times, enlarging the cooling surface and increasing residence time. That produces lower outlet temperatures without needing a larger external footprint. It's especially useful where airflow is limited or constant heavy loads occur.

• Greater fluid-to-metal contact for faster heat transfer
• Longer oil circulation path slows flow for improved cooling
• Compact core size (12" x 10" x 0.75") fits tight front-end spaces

Will this kit work with my vehicle and transmission?

This WOOTON kit is designed for universal fit with 5/16" (8mm) ID transmission cooler lines. It is known compatible with common GM transmissions such as the 4L60E and 4L80E, and fits many Chevy, GMC and Jeep models using that line size. Always verify your line diameter before installing.

• Fits 5/16" (8mm) transmission cooler lines
• Compatible with GM 4L60E / 4L80E transmissions
• Suitable for heavy towing trucks, SUVs and off-road vehicles

What materials and build details ensure durability?

The cooler core is constructed from T-6061 aluminum for corrosion resistance and efficient heat conduction. The included hose uses CPE material rated to 145 PSI and can tolerate temperatures from -40°F to 176°F, making it suitable for a wide range of climates and operating conditions.

• T-6061 aluminum core for long-term corrosion resistance
• CPE hose with 145 PSI working pressure rating
• Temperature tolerance from -40°F to 176°F

How long does installation take and what hardware is included?

Installation time depends on vehicle access and experience, but the kit ships with everything needed to mount and hook up the cooler to existing 5/16" lines. The Insta-dapt adapter and clamps help reduce the need for additional fittings in many cases.

• Includes 1 x 5/16" (8mm) hose and 4 hose clamps
• Comes with 4 mounting rods, 4 clips and 4 foam pads for secure attachment
• Includes an Insta-dapt adapter for easier line connections

Who this is for: drivers who tow trailers, haul heavy loads or run vehicles in demanding conditions and need a compact, high-capacity transmission cooling solution. If you operate a pickup, SUV or off-road rig with 5/16" cooler lines and want to reduce transmission oil temperatures without adding a bulky radiator, this kit offers a practical, durable option. Contact WOOTON customer support if you need fitment guidance or experience any issues — the kit is shipped with full hardware for most common installations.