* Sonnax 95740-15K, ZF8HP70 Accumulator Piston Kit. Also fits ZF8HP45, ZF8HP55

$ 69.99

Out of stock


Sonnax 95740-15K, ZF8HP70 Accumulator Piston Kit. Also fits ZF8HP45, ZF8HP55.

Overly firm up/downshift feel or harsh engagement can be a sign of deformed accumulator piston bumpers in listed units. The OE elastomeric (rubber) bumpers tend to take a set, resulting in loss of hydraulic damping. Sonnax accumulator piston kit 95740-15K restores hydraulic damping with improved service life.

  • Hardcoat anodized aluminum valve combats premature wear
  • New matching springs reproduce OE function
  • Direct replacement, no special tools required

Also Fits: 6F35 (Gen. 1), 6F35 (Gen.2), 6R140, 6R60, 6R75, 6R80, 845RE, CFT30, ZF6HP19, ZF6HP21, ZF6HP26, ZF6HP28, ZF6HP32, ZF6HP34

Application Units Accumulators Needed
Chrysler 845RE 7
Ford 6F35 (Gen. 1) 1
Ford 6F35 (Gen. 2) 1
Ford 6R60/6R60 6*
Ford 6R140 3*
Ford CFT23 5
Ford CFT30 5
ZF6HP19/26/32 (Gen. 1) 6
ZF6HP21/28/34 (Gen. 2) 7
ZF8HP45/55/70 7
*NOTE: Sometimes these require 2.

  • Pistons (7)
  • Springs (7)


  • Downshift clunk
  • Firm shifts
  • Erratic EDS solenoid control and/or EDS codes


OE accumulator piston bumpers lose elasticity and take a set due to long term heat and fluid exposure.


The Sonnax accumulator piston kit restores optimal hydraulic shock absorption and OE functionality to all the solenoid regulated circuits.

Additional information

Weight 1 lbs
Dimensions 4 × 4 × 2 in