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Rudy's Upgraded Heavy Duty 5/8" 1200 PSIB Allison Transmission Cooler Lines & Adapters For 01-10 6.6 Duramax

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Rudy's Transmission Cooler Line Kit for Chevy / GMC Duramax 6.6L LB7 LLY LBZ & LMM trucks with the 5 or 6 speed Allison automatic transmission.


Did you know the transmission cooler lines on your Duramax are prone to leaking? Fix the problem before it becomes a headache!



  • Heavy Duty hydraulic hoses prevent leaks
  • Cooler Transmission Temperatures
  • 5/8" Hydraulic Hose Provides Maximum Flow
  • Hose rated @ 300 PSI Working & 1200 PSI Burst
  • Includes fittings for early LB7’s with smaller 3/4”-16 threaded ports on the transmission


Fits: 2001-2010 Chevy & GMC 2500 & 3500 applications with the 6.6L LB7 LLY LBZ & LMM Duramax diesel engine.


Notice: Some radiators may require metric adapters. Often called setrab fittings. This kit includes two metric adapters.


  • DP0320
  • DP0320
  • Rudy's Performance Parts
  • In Stock & Ready To Ship!
  • New

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  • 15.0 lbs.
  • FREE Ground Shipping

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