Speed Stop Auto Repair / Masonbilt Diesel Performance Duramax 5/8 Transmission Cooler Line Kit 01-16 GM

Do you have leaky transmission lines? This is the last set of transmission lines you'll ever need. 

In a joint venture between Speed Stop Auto Repair and Masonbilt Diesel Performance, we have developed the most durable, serviceable, and the ONLY DOT-approved transmission line set with a LIFETIME warranty. All of these lines are made by hand, in-house, with equipment we own, meaning that we have complete control over quality and know that each line is being made to our exact specifications. 

Includes:

-Complete 3-piece replacement line set and all necessary fittings for the truck side, zip ties, and an extra O-ring.

-Instructions

-Lifetime Warranty 

-Real customer service you can call or text!

Features:

-5/8" flame and abrasion-resistant hose rated for 4000psi- SIGNIFICANTLY more than both OEM and built transmissions require

-Stainless JIC ORB fittings- no aluminum to corrode or crack

-Our own specific line lengths and fittings tailored specifically to each truck

Fitment notes: Please see pictures if you have additional questions:

-If you have an aftermarket radiator, you will need M22 fittings instead of OE-style to JIC. This can be easily determined if your radiator has a hex-shaped fitting BEHIND the OE-style transmission cooler fittings.

2001-2002 Allison transmission cooler inlet/outlet fittings had a smaller 3/4" thread diameter than later 7/8" units. If you think your transmission has been swapped with a later unit, you can measure the original trans cooler fitting in the transmission or reference the build plate found on the passenger-side of the transmission. If you need help identifying your fittings please contact us!