VBFIX-logo-web details-chart-web video-logo-web printlink SERVOFIX-logo-web r_and_r_only maillink sonnax-black Facebook-color Twitter-color LinkedIn-color Youtube-color

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.

6F35, 6R60, 6R75, 6R80, ZF6HP19, ZF6HP21, ZF6HP26, ZF6HP28, ZF6HP32, ZF6HP34, ZF8HP45, ZF8HP55, ZF8HP70

Accumulator Piston Kit
Part No. 95740-15K

You need this if... View Instructions

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
Application Units Accumulators Needed
Ford 6F35 1
Ford 6R60/6R60 6*
Ford 6R140 3*
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)

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.

ZF6HP19/26/32 (Gen. 1) With 053 Separator Plate Valve Body Layout

Zf6hp 053 vbl thumb

ZF6HP19, ZF6HP26, ZF6HP32 (Generation 1) Valve Body Layout

Zf6hp19 vbl thumb

ZF8HP55 Valve Body Layout

Zf8hp55 vbl thumb

ZF6HP21/28/34 (Generation 2) Valve Body Layout

Zf6hp21 28 34 gen 2

ZF8HP45, ZF8HP70 Valve Body Layout

Zf8hp45 70 vbl thumb

October 24, 2014

Latch It: Latching Valves in the 6R60/80 & 6R140 Family of Transmissions

Topics: Transmission Ford 6R80 Transmission 6R60 Transmission 6R140 Transmission

Read Now

June 29, 2016

“'Tween:” How to Identify the ZF6HP Series Valve Body that Bridges the 1st & 2nd Generation Designs

Maura Stafford

Topics: Diagnostics And Theory Transmission ZF ZF6HP19 Transmission ZF6HP26 Transmission ZF6HP32 Transmission ZF6HP21 Transmission ZF6HP28 Transmission ZF6HP34 Transmission

Read Now

January 14, 2014

ZF6HP19/26/32 (Generation 1), Ford 6R60, 6R75, 6R80, ZF6HP21/28/34 (Generation 2) Identification Guide

Topics: Identification Guides Transmission Ford ZF ZF6HP19 Transmission ZF6HP26 Transmission ZF6HP32 Transmission ZF6HP21 Transmission ZF6HP28 Transmission ZF6HP34 Transmission 6R80 Transmission 6R60 Transmission

Read Now

March 23, 2016

Six Ways from Sunday: Diagnosing ZF6 & Ford 6R60/80 TC-Related Drivability Concerns

Bob Warnke

Topics: Diagnostics And Theory Transmission Torque Converter ZF Ford ZF6HP19 Transmission ZF6HP26 Transmission ZF6HP32 Transmission ZF6HP21 Transmission ZF6HP28 Transmission ZF6HP34 Transmission 6R80 Transmission 6R60 Transmission

Read Now

January 21, 2013

ZF6HP19/26/32 (Gen. 1)/Ford 6R60, 6R80 Vacuum Test Guide

Topics: Vacuum Test Guides Vacuum Testing Transmission Ford ZF ZF6HP19 Transmission ZF6HP26 Transmission ZF6HP32 Transmission 6R80 Transmission 6R60 Transmission

Read Now

December 21, 2012

ZF6HP21/28/34 (Gen. 2) Vacuum Test Guide

Topics: Vacuum Testing Vacuum Test Guides Transmission ZF ZF6HP21 Transmission ZF6HP28 Transmission ZF6HP34 Transmission

Read Now

June 22, 2016

ZF6HP19/26/32 (Gen. 1) with 053 Separator Plate Vacuum Test Guide

Topics: Vacuum Test Guides Transmission ZF ZF6HP19 Transmission ZF6HP26 Transmission ZF6HP32 Transmission

Read Now

October 17, 2016

Transmission Report Newsletter

Topics: Transmission Report Newsletters Transmission ZF ZF8HP70 Transmission ZF8HP45 Transmission

Read Now

December 07, 2016

ZF8HP45/ZF8HP70 Vacuum Test Guide

Topics: Vacuum Test Guides Vacuum Testing Transmission ZF ZF8HP70 Transmission ZF8HP45 Transmission

Read Now

August 11, 2016

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

Topics: Webinars Transmission ZF ZF8HP70 Transmission ZF8HP55 Transmission ZF8HP45 Transmission

Watch Now

  • 95740 15k combo
  • 95740 15k
  • 95740 15k details

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.