---
product_id: 3765236
title: "Sonnax 4L60 4L60E 4L65-E & 4L70-E Pinless Accumulator Piston Kit"
brand: "sonnax"
price: "13181 Ft"
currency: HUF
in_stock: true
reviews_count: 13
category: "Sonnax"
url: https://www.desertcart.hu/products/3765236-sonnax-4l60-4l60e-4l65-e-and-4l70-e-pinless-accumulator
store_origin: HU
region: Hungary
---

# Pinless design eliminates leakage Steel balls plug pin bore securely Dual seals for airtight bore stability Sonnax 4L60 4L60E 4L65-E & 4L70-E Pinless Accumulator Piston Kit

**Brand:** sonnax
**Price:** 13181 Ft
**Availability:** ✅ In Stock

## Summary

> ⚡ Shift Like a Pro, Seal Like a Boss!

## Quick Answers

- **What is this?** Sonnax 4L60 4L60E 4L65-E & 4L70-E Pinless Accumulator Piston Kit by sonnax
- **How much does it cost?** 13181 Ft with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hu](https://www.desertcart.hu/products/3765236-sonnax-4l60-4l60e-4l65-e-and-4l70-e-pinless-accumulator)

## Best For

- sonnax enthusiasts

## Why This Product

- Trusted sonnax brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Effortless Upgrade:** Quick, user-friendly installation that transforms your GM 4L60-E, 4L65-E, and 4L70-E shift quality instantly.
- • **Dual-Seal Stability:** Experience rock-solid bore sealing that prevents piston cocking and ensures smooth, consistent shifts.
- • **Precision Steel Ball Plugs:** Reinforced pin bore plugs maintain integrity under pressure, extending transmission life.
- • **Leak-Proof Pinless Innovation:** Say goodbye to pin bore fluid loss and clutch burnouts with Sonnax’s patented pinless piston design.
- • **Trusted by Pros & Enthusiasts:** Join thousands who’ve upgraded to a 95% smoother shift experience and avoided costly transmission repairs.

## Overview

The Sonnax 4L60/4L60E/4L65-E/4L70-E Pinless Accumulator Piston Kit features a patented pinless design with dual seals and steel ball plugs to eliminate pin bore leakage, stabilize the piston, and prevent wear-related shift issues. Ideal for GM transmissions prone to burnt clutches and poor shifting, this kit offers a durable, easy-to-install upgrade that significantly improves shift smoothness and transmission longevity.

## Description

Complaints: Burnt clutches & bands and poor shift quality. Cause: Wear at the piston pin bore due to repeated reciprocation. Correction: The Sonnax patented pinless design with dual seals stabilizes the piston in the bore and provides improved sealing characteristics. Use of the Sonnax part eliminates the need for the pins. In GM 4L60-E, 4L65-E and 4L70-E units it is common to have poor shift quality, burnt bands or clutches due to accumulator piston wear. Repeated reciprocation of the accumulator piston causes wear at the piston pin bore interface. After this wear reaches a critical point, fluid loss through the piston pin bore cannot be compensated due to lack of pump volume. In addition, the piston can get cocked and gall the accumulator bore due to the pin bore wear or the spring bottoming out. To prevent these conditions in the 1-2 or 3-4 accumulator bores, Sonnax offers pinless accumulator piston kit 77998-03K.

Review: Works great. - Im not saying my shift is 100% like new but it was a noticable difference. 95% shifts real smooth vs before 1% of the time if i let off the gas it shifted smooth. Theres also a great video on youtube on how to install it. Only like 15 miles so far will update if anything changes.
Review: Super easy install - No issues and nice upgrade from stock plastic piston with the rod. I noticed slightly better shifting

## Features

- Pinless design eliminates the possibility of pin bore leakage
- Dual seals stabilize and completely seal the bore and provide a tight seal
- Steel balls plug existing pin bore in case or cover
- Pinless design eliminates the possibility of pin bore leakage and the additional length stabilizes the piston to prevent piston cocking

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00BCN9Z5A |
| Best Sellers Rank | #74,795 in Automotive ( See Top 100 in Automotive ) #41 in Automotive Replacement Transmission Hard Parts |
| Brand | Sonnax |
| Customer Reviews | 4.7 4.7 out of 5 stars (540) |
| Date First Available | February 7, 2013 |
| Is Discontinued By Manufacturer | No |
| Item Weight | 1.76 ounces |
| Item model number | WO161131 |
| Manufacturer | Sonnax Industries, Inc. |
| Manufacturer Part Number | 77998-03K |
| OEM Part Number | 62-77998-03K |
| Package Dimensions | 8.27 x 5 x 1.1 inches |

## Images

![Sonnax 4L60 4L60E 4L65-E & 4L70-E Pinless Accumulator Piston Kit - Image 1](https://m.media-amazon.com/images/I/41Z9r7cWDeL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Works great.
*by J***N on December 28, 2025*

Im not saying my shift is 100% like new but it was a noticable difference. 95% shifts real smooth vs before 1% of the time if i let off the gas it shifted smooth. Theres also a great video on youtube on how to install it. Only like 15 miles so far will update if anything changes.

### ⭐⭐⭐⭐⭐ Super easy install
*by K***Y on November 10, 2024*

No issues and nice upgrade from stock plastic piston with the rod. I noticed slightly better shifting

### ⭐⭐⭐⭐⭐ G.M. SHAME on You
*by B***J on November 15, 2025*

Great Product The Factory OEM ..Accumulators are made of PLASTIC.. the GENERAL MOTORS "ENGINEERS" must Hate America Because .. If anyone purposely designs A "Plastic" Product that is Deep in the internals of A Transmission ..with Extreme Heat and Constant Movement EVERY TIME THE TRANSMISSION SHIFTS.. MUST KNOW THAT THE TRANSMISSION WILL FAIL.. AND That Will Cost Americans .. THOUSANDS OF DOLLARS IN REPAIRS... G.M. ..WHY WOULD YOU DO THIS TO FELLOW AMERICANS? SHAME ON YOU..!!! GENERAL MOTORS .. SHAME ON YOU !!

## Frequently Bought Together

- Sonnax 4L60 4L60E 4L65-E & 4L70-E Pinless Accumulator Piston Kit
- ACDelco GM Original Equipment 24219942 Automatic Transmission 1-2 Green Accumulator Piston Outer Spring
- ACDelco GM Original Equipment 24220146 Automatic Transmission 1-2 Yellow Accumulator Piston Inner Spring

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.hu/products/3765236-sonnax-4l60-4l60e-4l65-e-and-4l70-e-pinless-accumulator](https://www.desertcart.hu/products/3765236-sonnax-4l60-4l60e-4l65-e-and-4l70-e-pinless-accumulator)

---

*Product available on Desertcart Hungary*
*Store origin: HU*
*Last updated: 2026-02-25*