--- product_id: 305826983 title: "Sonnax 4L60 4L60E 4L65-E & 4L70-E Pinless Accumulator Piston Kit" brand: "sonnax" price: "AR$97412" currency: ARS in_stock: true reviews_count: 5 category: "Sonnax" url: https://www.desertcart.com.ar/products/305826983-sonnax-4l60-4l60e-4l65-e-and-4l70-e-pinless-accumulator store_origin: AR region: Argentina --- # 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:** AR$97412 **Availability:** ✅ In Stock ## Summary > ⚙️ Upgrade your shift game with leak-proof precision! ## Quick Answers - **What is this?** Sonnax 4L60 4L60E 4L65-E & 4L70-E Pinless Accumulator Piston Kit by sonnax - **How much does it cost?** AR$97412 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.com.ar](https://www.desertcart.com.ar/products/305826983-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 - • **Dual-Seal Stability:** Experience rock-solid bore sealing that prevents wear and ensures consistent shift quality. - • **DIY-Friendly Installation:** Engineered for easy self-installation—no mechanic needed to upgrade your ride’s performance. - • **Smooth Shifts, Every Time:** Restore near-new transmission feel by eliminating piston wear and burnt clutches. - • **Precision Steel Ball Plugs:** Reinforced sealing with steel balls that block existing pin bores for ultimate durability. - • **Leak-Proof Pinless Innovation:** Say goodbye to pin bore fluid leaks with Sonnax’s patented pinless piston design. ## Overview The Sonnax 4L60 series Pinless Accumulator Piston Kit replaces worn piston pin bores with a patented pinless design featuring dual seals and steel ball plugs. This upgrade eliminates fluid leaks and piston wear that cause burnt clutches and poor shift quality in GM 4L60-E, 4L65-E, and 4L70-E transmissions. Lightweight and easy to install, it delivers smoother, more reliable gear shifts and extends transmission life. ## 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: mejoro la transmisión recomiendo su uso es fácil de instalar lo pude yo mismo y no soy mecánico Review: 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. ## 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 ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B00BCN9Z5A | | Brand | Sonnax | | Customer Reviews | 4.7 4.7 out of 5 stars (520) | | Date First Available | 18 March 2021 | | Item Weight | 50 g | | Item model number | WO161131 | | Manufacturer | Sonnax | | Manufacturer Part Number | 77998-03K | | OEM Part Number | 62-77998-03K | | Package Dimensions | 21.01 x 12.7 x 2.79 cm; 50 g | ## 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 ### ⭐⭐⭐⭐⭐ Review *by N***O on 22 September 2024* mejoro la transmisión recomiendo su uso es fácil de instalar lo pude yo mismo y no soy mecánico ### ⭐⭐⭐⭐⭐ Review *by J***N on 28 December 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. ### ⭐⭐⭐⭐⭐ Review *by A***R on 16 August 2025* Not sure how or why, but this fixed the 1-2 Rough shift and 2-3 weak/sloppy shift in my 2003 Sierra 1500 with the 4L60e. It drives like a new truck. It will take a decent amount of experience to DIY this. I’m no transmission builder, but if you got some buddies and a hoist, it’s a breeze. Do lots of research on youtube on how to do the job before attempting. The trans pan must be dropped to do the job. Great product. ## 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.com.ar/products/305826983-sonnax-4l60-4l60e-4l65-e-and-4l70-e-pinless-accumulator](https://www.desertcart.com.ar/products/305826983-sonnax-4l60-4l60e-4l65-e-and-4l70-e-pinless-accumulator) --- *Product available on Desertcart Argentina* *Store origin: AR* *Last updated: 2026-05-21*