New Transmission Lines HEAVY-DUTY Cooler Hoses For 2006-10 GM 6.6L +Allison

Transmission Lines for GM 6.6L with Allison

These heavy-duty transmission cooler lines and hoses replace the factory cooler plumbing on 2006-2010 GM 6.6L Duramax trucks equipped with the Allison transmission, restoring reliable fluid flow between the transmission and cooler.

Overview

These heavy-duty transmission lines are a direct replacement set for the cooler circuit on 2006-2010 GM 6.6L trucks running the Allison transmission. The transmission lines carry hot fluid away from the gearbox and return it cooled, protecting internal components during towing and heavy hauling. Built for owners maintaining or repairing the factory cooler plumbing on their Duramax and Allison drivetrain.

Built For Performance

• Heavy-duty construction suited to high-pressure transmission fluid flow
• Designed as a direct fit for the factory cooler line routing
• Includes cooler hoses to complete the transmission cooling circuit
• Rated for the heat and load demands of the 6.6L Duramax and Allison combination
• Pre-formed bends match original line paths for straightforward installation

Fits These Machines

• for 2006-2010 GM 6.6L Duramax trucks with Allison transmission

On-The-Job Use

• Towing and hauling with heavy trailers
• Restoring transmission cooling after a line leak or failure
• Routine replacement of tired or corroded factory cooler lines
• Keeping fluid temperatures stable during long highway drives

Specs At A Glance

Good To Know

Q: Do these lines fit both left and right sides of the cooler circuit? A: The set covers the transmission cooler plumbing on 2006-2010 GM 6.6L trucks with the Allison transmission. Confirm the exact routing against your truck's build before ordering.

Q: Can these be installed with basic hand tools? A: These lines mount in the factory locations and are designed for direct replacement of the original cooler hoses. A flare nut wrench set makes the job easier.

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