October 24, 2014
Symptoms:
- Downshift clunk
- Firm shifts
- Erratic EDS solenoid control and/or EDS codes
Cause:
OE accumulator piston bumpers lose elasticity and take a set due to long term heat and fluid exposure.Correction:
The Sonnax drop-in accumulator piston kit restores optimal hydraulic shock absorption and OE functionality to all the solenoid regulated circuits.6F35 (Gen. 1), 6F35 (Gen. 2), 6R100, 6R140, 6R60, 6R75, 6R80 (2009-2014), 6R80 (2015-Later), 845RE, CFT30, ZF6HP19, ZF6HP21, ZF6HP26, ZF6HP28, ZF6HP32, ZF6HP34, ZF8HP45, ZF8HP55, ZF8HP70
Accumulator Piston Kit
Part No. 95740-15K
Also fits Ford CFT23.
You need this if... View Instructions Find a DistributorOverly 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 direct-replacement 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
- Drop-in Zip Valve™ parts install quickly and easily
| Application Units (Click Link for Valve Body Layout) | Accumulators Needed |
|---|---|
| Chrysler 845RE | 7 |
| Ford 6F35 (Gen. 1) | 1 |
| Ford 6F35 (Gen. 2) | 1 |
| Ford 6R60/6R80 | 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. | |
Learn More About Zip Valve™ Drop-In Repairs
- 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.
Ford 6R80 (2015-Later), 6R100 Valve Body Layout
Ford 6R140 Valve Body Layout
Ford Gen. 1 & 2 6F35 Valve Body Layout
Ford CFT30 Valve Body Layout
ZF6HP21/28/34 (Gen. 2) Valve Body Layout
ZF8HP55 Valve Body Layout
ZF6HP19/26/32 (Gen. 1) without 053 Separator Plate Valve Body Layout
ZF6HP19/26/32 (Gen. 1) with 053 Separator Plate Valve Body Layout
ZF8HP45, ZF8HP70 Valve Body Layout
June 29, 2016
“'Tween:” How to Identify the ZF6HP Series Valve Body that Bridges the 1st & 2nd Generation Designs
Maura Stafford
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ZF6HP19/26/32 (Generation 1), Ford 6R60, 6R75, 6R80, ZF6HP21/28/34 (Generation 2) Identification Guide
March 23, 2016
Six Ways from Sunday: Diagnosing ZF6 & Ford 6R60/80 TC-Related Drivability Concerns
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January 21, 2013
ZF6HP19/26/32 (Gen. 1)/Ford 6R60, 6R80 Vacuum Test Guide
December 21, 2012
ZF6HP21/28/34 (Gen. 2) Vacuum Test Guide
June 22, 2016
ZF6HP19/26/32 (Gen. 1) with 053 Separator Plate Vacuum Test Guide
October 17, 2016
Transmission Report: Turn Your ZF6 Solenoid Cores into CASH!
December 07, 2016
Chrysler 845RE; ZF8HP45/70 Vacuum Test Guide
August 11, 2016
Sonnax Webinar Part 1 of 2: Dodge TorqueFlite® 8 (ZF8) Features & 2015 Challenger Test Drive
July 27, 2017
How to Recognize & Repair Solenoid Accumulators in Late-Model Valve Bodies
August 01, 2017
Transmission Report: Recognize & Repair Solenoid Accumulators in Late-Model Valve Bodies
March 07, 2016
Ford CFT30 Vacuum Test Guide
October 11, 2018
ZF8HP55 Vacuum Test Guide
October 08, 2020
How to Identify Similar Ford & ZF6 Transmissions — Four Features to Check Before You Begin a Rebuild
Maura Stafford
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Patent
- 8,794,108
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.
