--- product_id: 581925707 title: "4L60E 4L60 4L65E 4L70E 4th Gear Super Hold Dual Servo Kit SONNAX 77767K 1982-up" brand: "1409kmt" price: "72.83 DT" currency: TND in_stock: true reviews_count: 4 url: https://www.desertcart.tn/products/581925707-4l60e-4l60-4l65e-4l70e-4th-gear-super-hold-dual-servo store_origin: TN region: Tunisia --- # Easy in-vehicle installation Fits GM 4L60/4L65/4L70 transmissions 1982+ 40% more apply surface area 4L60E 4L60 4L65E 4L70E 4th Gear Super Hold Dual Servo Kit SONNAX 77767K 1982-up **Brand:** 1409kmt **Price:** 72.83 DT **Availability:** ✅ In Stock ## Summary > ⚙️ Lock in power, shift like a pro – don’t get left behind! ## Quick Answers - **What is this?** 4L60E 4L60 4L65E 4L70E 4th Gear Super Hold Dual Servo Kit SONNAX 77767K 1982-up by 1409kmt - **How much does it cost?** 72.83 DT with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/581925707-4l60e-4l60-4l65e-4l70e-4th-gear-super-hold-dual-servo) ## Best For - 1409kmt enthusiasts ## Why This Product - Trusted 1409kmt brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Trusted Durability:** Backed by a 1-year warranty for peace of mind on every ride - • **Broad Compatibility:** Seamlessly fits all GM 4L60, 4L60E, 4L65E, and 4L70E transmissions from 1982 onward - • **Plug-and-Play Upgrade:** Simple in-vehicle install means less downtime, more driving - • **Enhanced Shift Quality:** Eliminates poor 3-4 shift issues and band failure in performance vehicles - • **Unmatched Holding Power:** 40% increased apply surface area for superior 4th gear hold ## Overview The Sonnax 4th Gear Super Hold Dual Servo Kit (77767K) delivers 40% more apply surface area to dramatically improve holding power and shift quality in GM 4L60, 4L60E, 4L65E, and 4L70E transmissions from 1982 onward. Designed to fix common 3-4 shift issues and band failures, this easy-to-install kit is a must-have upgrade for performance enthusiasts seeking reliable, smooth gear transitions backed by a 1-year warranty. ## Description 4L60E 4L60 4L65E 4L70E 4th Gear Super Hold Dual Servo Kit SONNAX 77767K 1982-up ## Features - 4th Gear Super Hold Dual Servo Kit fits TH700R4 4L60E 4L65E 4L70E GM TRANSMISSION all varieties of these transmissions 1982-UP . - Sonnax 4th Gear super hold dual servo kit 77767K features 40% more apply surface area for greater holding power in GM 4L60 (700-R4), 4L60-E, 4L65-E and 4L70-E units. - Vehicles with these transmissions often exhibit poor 3-4 shift quality and experience band failure in performance applications. - Combine this servo kit with Sonnax 2nd gear servo 77911-03K for unmatched holding power and shift performance that's an easy in-vehicle insta. - 1 YEAR WARRANTY , Kindly do not hesitate to contact us back in the future if you feel that you need further assistance. ## Technical Specifications | Specification | Value | |---------------|-------| | Manufacturer | LANHO AUTO PARTS | | Brand | 1409KMT | | Model | KMT-OT001426 | | Item Weight | 1.23 pounds | | Package Dimensions | 3.82 x 3.62 x 2.52 inches | | Item model number | KMT-OT001426 | | Exterior | Machined | | Manufacturer Part Number | KMT-OT001426 | ## Images ![4L60E 4L60 4L65E 4L70E 4th Gear Super Hold Dual Servo Kit SONNAX 77767K 1982-up - Image 1](https://m.media-amazon.com/images/I/510dezNNj2L.jpg) ![4L60E 4L60 4L65E 4L70E 4th Gear Super Hold Dual Servo Kit SONNAX 77767K 1982-up - Image 2](https://m.media-amazon.com/images/I/51kINADRInL.jpg) ![4L60E 4L60 4L65E 4L70E 4th Gear Super Hold Dual Servo Kit SONNAX 77767K 1982-up - Image 3](https://m.media-amazon.com/images/I/5158NRe8V8L.jpg) ![4L60E 4L60 4L65E 4L70E 4th Gear Super Hold Dual Servo Kit SONNAX 77767K 1982-up - Image 4](https://m.media-amazon.com/images/I/51bDrCnyA5L.jpg) ![4L60E 4L60 4L65E 4L70E 4th Gear Super Hold Dual Servo Kit SONNAX 77767K 1982-up - Image 5](https://m.media-amazon.com/images/I/51rv3w-5NML.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Great upgrade *by B***0 on March 15, 2024* Great and easy upgrade for the 4l60E. Easy to install and you will notice the difference immediately ### ⭐ This is a KNOCK OFF. *by A***R on January 8, 2025* I verified with the original manufacturer. Do not trust the information on this listing. ### ⭐ Doesn’t fit *by R***. on October 5, 2024* The seals were the wrong size causing the servo not to travel correctly. In my case it’s a 10 hour job to remove them and I neither have the time or inclination to do that removal in triple digit heat. ## Frequently Bought Together - 4L60E 4L60 4L65E 4L70E 4th Gear Super Hold Dual Servo Kit SONNAX 77767K 1982-up - 4L60 4L60E 4L65E 4L70E Transmission 2nd Gear Super Hold Servo Kit Sonnax - Sonnax HD 2-3 Shift Valve --- ## 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.tn/products/581925707-4l60e-4l60-4l65e-4l70e-4th-gear-super-hold-dual-servo](https://www.desertcart.tn/products/581925707-4l60e-4l60-4l65e-4l70e-4th-gear-super-hold-dual-servo) --- *Product available on Desertcart Tunisia* *Store origin: TN* *Last updated: 2026-06-21*