The non-anodized valves score and seize in the bore
These valves are hard anodized with annular grooves which eliminate surface wear and reduce valve hang-up.
OE 4T60-E shift valves have changed materials over the years, starting with steel, changing to silver-colored uncoated raw aluminum, and finally anodized aluminum. 4T60-E units can have a combination of these materials with the silver-colored uncoated raw aluminum being especially problematic due to scoring/scratching and intermittent sticking. It is highly recommended to replace all raw aluminum shift valves with the Sonnax hard-coat anodized replacements. These are drop-in replacements and do not require any machining. Valves also have applications in 4T60-E and 4T65-E.
Sonnax valve body layouts provide a detailed overview of individual units making it quick and easy to determine what’s available for the specific valve body you’re working on. See all Sonnax valve body layouts.
March 21, 2013
Topics: Vacuum Testing Vacuum Test Guides Transmission GM 4T65-E TransmissionRead Now
Contact a Sonnax Parts Distributor.