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75420 DRP Transmission Cooler Lines 5/8" - GM 2011-2014

SKU: DRP75420
Manufacturer: Deviant Race Parts
2011-2014 GM 6.6L Duramax LML - GM's factory transmission lines leave something to be desired. DRP's 5/8-inch cooler line kit completely replace the OEM lines with 1500psi rated industrial hydraulic lines.

PRODUCT DETAILS (click to expand)

Mftr. Part# 75420
UPC 887753065353
Weight (lbs.): 10.25 lbs.
Dimensions: 4.00" x 14.00" x 14.00"

PRODUCT SPECS (click to expand)

Product Type Transmission Cooler Lines
Line Size 5/8"
Transmission Type Allison A1000
$399.00 (CAD)


Deviant Race Parts LEAK FREE Transmission Repair lines for 11-14 GM 6.6L Duramax equipped Pickups with the Allison 1000 Transmission.

If you have the dreaded leaky transmission cooler lines on your GM full size Duramax/Allison pick up truck this is the answer you have been looking for!

For a permanant solution to your leaky transmission lines choose the Diesel Race Parts Transmission Cooler Repair Lines. Made from 5/8" Parker industrial hose that is rated at 1500 psi.

This will cure your problems especially in the cold weather climates where this problem is most prevelant.


  • 5/8" 1500psi rated Industrial Strength Hydraulic Lines
  • All necessary fittings and adapters to bolt up to factory locations
  • Full, step by step, instructions
  • Install Difficulty: 2 out of 5 wrenches (1 wrench being easiest)

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