2003 only 5/8" allison transmission cooler hose set #50400




Product Description

(RECOMMENDED FOR APPLICATIONS REQUIRING HIGHER FLOW THAN NORMAL. Examples: heavy towing, chipped ecu, larger turbo, propane injection, or modified transmission.)

This is a fix for the commonly leaking transmission cooler hoses for 2003 model year only chevy, and gmc trucks equipped with the allison 1000 transmission behind either the 6.6 liter duramax, or the 8.1 liter gas engine. These are made out of 5/8" id double braid hydraulic hose, rated for 1900 psi working pressure, and 7600 psi burst pressure. These hoses will handle the pressure, and temperature that the factory hoses will not. I have been building these for customer's vehicles since june 2009, with no issues whatsoever. Included is everything to make the conversion possible, except for the tools. I also included detailed instructions, which includes a list of required tools to perform the job properly.

Processing time for the 5/8" sets should take 2-3 days.


  • Manufactured by: Red's Auto Rehab


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