For GM 4L60E 4L65E TH350 TH400 Automatic Transmission Cooler 6AN Hose Line Kit

Transmission Cooler 6AN Hose Line Kit for GM

This automatic transmission cooler and 6AN hose line kit serves as a direct replacement for worn or insufficient factory cooling on GM 4L60E, 4L65E, TH350, and TH400 transmissions, helping keep fluid temperatures in check under load.

Overview

This transmission cooler 6AN hose line kit is built to replace tired factory cooling lines on GM automatic transmissions. The kit routes fluid through an external cooler to shed heat before it returns to the transmission, which helps extend fluid and component life. It suits drivers running GM 4L60E, 4L65E, TH350, or TH400 transmissions in daily drivers, tow rigs, and off-road builds.

Built For Performance

• 6AN braided hose and fittings for secure, leak-resistant fluid routing
• External cooler core designed to dissipate heat from automatic transmission fluid
• Compatible with GM 4L60E, 4L65E, TH350, and TH400 transmission families
• Kit format supports a full cooler and line installation in one pass
• Steel and aluminum construction suited to under-hood temperatures
• Universal layout that adapts to common transmission cooler mounting points

Fits These Machines

• for GM 4L60E equipped vehicles
• for GM 4L65E equipped vehicles
• for GM TH350 equipped vehicles
• for GM TH400 equipped vehicles

On-The-Job Use

• Towing and hauling where sustained transmission load raises fluid temperature
• Daily driving in hot climates where factory cooling falls short
• Off-road and trail use with low-speed, high-load conditions
• Transmission rebuilds where the stock cooler and lines are replaced
• Performance builds running higher stall converters or added power

Specs At A Glance

Good To Know

Q: Does this kit fit any GM transmission? A: It is intended for the 4L60E, 4L65E, TH350, and TH400 families listed in the title, so confirm your transmission model before ordering.

Q: Do I need extra fittings to install this? A: The kit includes 6AN hose and fittings for the cooler circuit, but adapter fittings at the transmission case may be needed depending on your setup.

Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.