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  • 2-3 Shuttle
  • Erratic shifts
  • Temperature-sensitive shifts
  • No 3rd
  • No 4th
  • 2nd Gear starts


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.

4T60-E, 4T65-E

4-3 Downshift Valve
Part No. 84754-39K

View Instructions

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 valves use a hard-anodized finish to reduce wear and friction
  • Valves incorporate annular grooves to center the valves and reduce sticking caused by side loading
  • Material: Anodized Aluminum

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.

GM 4T65-E Valve Body Layout

Gm 4t65 e thumb

March 21, 2013

GM 4T65-E Vacuum Test Guide

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  • 84754 39k combo
  • 84754 39k