Printpartsummary
Symptoms:
  • Erratic EDS solenoid control and/or EDS codes
  • Firm shifts
  • Harsh engagement
Cause:

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

Correction:

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

Video

6R60, 6R75, 6R80, ZF6HP19, ZF6HP21, ZF6HP26, ZF6HP28, ZF6HP32, ZF6HP34, ZF8HP45, ZF8HP55, ZF8HP70

Accumulator Piston Kit

Part No.

95740-15K

Accumulator Piston Kit
  • 95740-15k_combo

  • Accumulator Piston Kit

  • 95740-15k_details

Small_95740-15k_combo Small_95740-15k Small_95740-15k_details

6R60, 6R75, 6R80, ZF6HP19, ZF6HP21, ZF6HP26, ZF6HP28, ZF6HP32, ZF6HP34, ZF8HP45, ZF8HP55, ZF8HP70

Accumulator Piston Kit

Part No. 95740-15K

  • Pistons (7)
  • Springs (7)

Complaint:

  • Erratic EDS solenoid control and/or EDS codes
  • Firm shifts
  • Harsh engagement

Cause:

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


Correction:

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

Overly firm up/downshift feel or harsh engagement can be a sign of deformed accumulator piston bumpers in ZF6HP19/26/32 (Generation 1), ZF6HP21/28/34 (Generation 2), ZF8HP45/55/70, and Ford 6R60, 6R80 units. The OE elastomeric (rubber) bumpers tend to take a set, resulting in loss of hydraulic damping. The Sonnax accumulator piston kit 95740-15K restores hydraulic damping with improved service life.

  • Hard-coat anodized aluminum to resist wear
  • New matching springs reproduce OE function
  • Direct replacement, no special tools required
NOTE:

ZF6HP19/26/32 (Generation 1) valve bodies require six accumulator pistons and springs. ZF6HP21/28/34 (Generation 2) and ZF8HP45/55/70 valve bodies require seven accumulator pistons and springs. Most Ford 6R60 and 6R80 valve bodies require six pistons and springs, but some require only two pistons and springs.

  • Patent No. 8,794,108

Related Parts

You need this if...

The OE accumulator piston bumpers are worn, brittle or missing. Examine the bumpers closely for flat spots or cracks. Be sure that used bumpers quickly return to their original shape after deformation.

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Valve Body Layouts

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.

Valve Body Layout ZF6HP19, ZF6HP26, ZF6HP32 (Generation 1)
Valve Body Layout ZF6HP21/28/34 (Generation 2)
Valve Body Layout ZF6HP19/26/32 (Gen. 1) With 053 Separator Plate
Valve Body Layout ZF8HP45, ZF8HP70
Valve Body Layout ZF8HP55
 

Sonnax Webinar Part 1 of 2: Dodge TorqueFlite® 8 (ZF8) Features & 2015 Challenger Test Drive

Watch this webinar recording to learn about:
  • 2015 Dodge Challenger SXT Plus features
  • Test drive in automatic & manual modes
  • Torque converter application strategy & pressure specs
  • Transmission theory of operation and clutch & brake application charts
  • Solenoid & valve body theory of operation & component breakdown

View presentation slides

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