Deviant Race Parts LEAK FREE Transmission Repair lines for 15-16 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.