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  • 1-2 Bang at light throttle
  • 3-4 Bump
  • Bang shifts
  • Harsh shifts
  • Reduced 2-4 band life
  • Soft shifts


Deterioration of accumulator valve sleeve allows critical throttle, line and/or accumulator pressure loss.


Recover hydraulic control and renew shift operation by installing Sonnax accumulator valve sleeve.


OE valve and spring must be reused with Sonnax sleeve.

4L60-E, 4L65-E, 4L70-E

DX Code Accumulator Valve Sleeve
Part No. 77754-45

This sleeve can only be used to replace OE sleeves with DX code.

You need this if... View Instructions

Various shift concerns are common in vehicles equipped with GM 4L60-E, 4L65-E or 4L70-E transmissions. This can often be caused by wear at the accumulator valve sleeve. Throttle pressure, line pressure or accumulator pressure may leak past wear pockets in the sleeve, creating harsh/soft or bang shifts. Installing Sonnax DX code accumulator valve sleeve 77754-45 corrects excess wear for revived shift operation and feel.

  • Direct replacement sleeve
  • Renews accumulator action and quells leaks

"DX" code sleeves deliver firmer shifts than OE "AX", "BX" and "CX" Code designs.

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You need this if...

Vacuum testing at the port(s) indicated fails to hold the recommended minimum in-Hg, or if wear is visually detected.

  • 77754 45 test