FILTERUP Transmission Oil Cooler 2-Pass Aluminum, 5/16" Line Kit – Compact High-Efficiency Cooling

FILTERUP Upgrade 2 Pass Aluminium Transmission Oil Cooler is a high-efficiency, T-6061 aluminum two-pass tube-and-fin cooler that lowers transmission fluid temperatures and helps extend transmission life.

Designed for universal compatibility with 5/16" ID transmission cooler lines, this compact oil cooler uses a two-pass flow to extract heat more effectively than single-pass designs. Built from corrosion-resistant T-6061 aluminum and supplied with a full mounting and hose kit, it’s intended for drivers who tow, haul, or simply want to keep transmission temperatures in check under demanding conditions. The package includes hoses, mounting hardware and an Insta-dapt adapter for straightforward installation on most vehicles.

How does the two-pass design improve cooling performance?

The two-pass tube-and-fin layout forces fluid to change direction inside the core, increasing contact time with the cooling surfaces and improving heat transfer. That results in a lower steady-state transmission fluid temperature without significantly increasing pressure drop.

• Two-pass flow increases dwell time for better heat exchange.
• Tube-and-fin construction gives a large surface area for efficient cooling.
• Compact core fits into tight engine bays while maintaining capacity.

What materials and construction features ensure long-term durability?

The cooler’s core and end tanks are made from T-6061 aluminum, chosen for its corrosion resistance and light weight. The hose supplied is CPE material, which resists abrasion and remains flexible in a wide temperature range.

• T-6061 aluminum core resists rust and reduces overall weight.
• CPE hose offers abrasion resistance and high flexibility for easy routing.
• Included foam pads and clips protect mounting points and reduce vibration.

Will this fit my vehicle and what’s included for installation?

This FILTERUP cooler is designed for transmissions that use 5/16" (8mm) ID cooler lines. The kit ships with common mounting and connection components so you can install it on many cars, SUVs, or light trucks without sourcing extra parts.

• Includes 5/16" (8mm) hose, Insta-dapt adapter, and hose clamps.
• Four mounting rods, clips, and foam pads for secure attachment.
• Check your vehicle’s cooler line ID and clearance before ordering.

How does adding this cooler affect transmission performance and maintenance?

Keeping transmission fluid cooler reduces thermal breakdown of the fluid and may lower wear on internal components, particularly under heavy loads or towing. While not a cure-all, it helps maintain stable fluid temperatures, potentially reducing the frequency of heat-related maintenance issues.

• Helps reduce fluid overheating during towing or stop-and-go traffic.
• Can contribute to longer fluid life and more consistent performance.
• Easy-to-reach installation simplifies routine inspection and hose replacement.

Who is this for: The FILTERUP Upgrade 2 Pass Aluminium Transmission Oil Cooler is aimed at drivers who tow or haul, owners of older vehicles seeking better thermal control, and anyone looking for a lightweight, corrosion-resistant aftermarket cooler compatible with 5/16" transmission lines. It’s a practical upgrade for DIY installers and professional shops alike, supplied with the essential hoses and mounting hardware to get you up and running quickly. FILTERUP also provides one year of product quality support if installation questions or issues arise.