--- product_id: 24710278 title: "Sonnax HD 2-3 Shift Valve" brand: "sonnax" price: "Ā£47.83" currency: GBP in_stock: true reviews_count: 8 category: "Sonnax" url: https://www.desertcart.co.uk/products/24710278-sonnax-hd-2-3-shift-valve store_origin: GB region: United Kingdom --- # Extends clutch life Drop-in replacement Perfect for paddle shifters Sonnax HD 2-3 Shift Valve **Brand:** sonnax **Price:** Ā£47.83 **Availability:** āœ… In Stock ## Summary > šŸš— Shift into the Future with SonnaxHD! ## Quick Answers - **What is this?** Sonnax HD 2-3 Shift Valve by sonnax - **How much does it cost?** Ā£47.83 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/24710278-sonnax-hd-2-3-shift-valve) ## 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 - ā€¢ **Easy Installation:** No hassle, just drop it in and go! - ā€¢ **Upgrade Your Gear:** Compatible with aftermarket paddle shifters for a sporty feel. - ā€¢ **Revitalize Your Ride:** Transform your driving experience with a seamless shift. - ā€¢ **Engineered for Excellence:** Designed specifically for electrically downshifted units. - ā€¢ **Durability Meets Performance:** Enhances the longevity of your forward clutch and input sprag. ## Overview The SonnaxHD 2-3 Shift Valve is a high-performance drop-in replacement valve designed to extend the life of your vehicle's forward clutch and input sprag. Ideal for use in electrically downshifted units, it seamlessly integrates with aftermarket paddle shifters, ensuring a smooth and responsive driving experience. ## Description Features & Benefits, Drop-in-replacement valve, Extends life of the forward clutch and input sprag, Ideal for electrically downshifted units with aftermarket paddle shifters. Part Summary: Sonnax has developed a drop-in replacement 2-3 shift valve that applies the overrun clutch in D3, 1st , 2nd and 3rd gears where the factory valve applies the overrun clutch only in D3, 3rd gear. Applying the overrun clutch in 1st and 2nd provides added durability to the input sprag and forward clutch in heavy duty vehicles, plow trucks and high performance applications. In addition, this upgrade works well with applications using aftermarket electronic paddle shifters. With the overrun clutch on, the Sonnax valve allows full downshift engine braking in 2nd, while the shifter remains in the D3 position. Review: What can I say except, It's Sonnax !! - Sweet valve, when you're in D3 this valve makes your overrun clutches come on in 2nd and 3rd gear also. I wasn't crazy about drilling a small hole in my valvebody, but they are plentiful if you mess it up or if you ever want to go back to stock. Kind of causes a harsh 2nd to 3rd downshift while coming to a stop, but while you are in D4 can't tell any difference. Look on the internet if you're not sure where to drill, took me picture after picture before I finally decided where to drill. Review: Nice for towing - Used during 4l60e rebuild along with complete Sonnax Servo and performance pack. It may seem pricey to purchase all but it seems to have hell of a lot of holding power. Converter lockup now is unreal. No flair during shifts. Down shifts are nice and noticeable along with this item installed. Makes it nice Slowing down while towing. Shifts are firm and noticeable from 1-2 but the rest are quick with no flair or lag. Iā€™m very pleased with complete package. Items were Installed on 1/2 ton 4x4 suburban. ## Features - Drop-in-replacement valve - Extends life of the forward clutch and input sprag - Ideal for electrically downshifted units with aftermarket paddle shifters ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B00BYG7S5E | | Best Sellers Rank | #1,534,191 in Automotive ( See Top 100 in Automotive ) #2,770 in Automotive Replacement Transmission Hard Parts | | Brand | Sonnax | | Brand Name | Sonnax | | Customer Reviews | 4.7 out of 5 stars 64 Reviews | | Exterior Finish | Metal | | Inlet Connection Size | 4.2 Inches | | Inlet Connection Type | Flare | | Item Dimensions | 5.8 x 4.2 x 0.5 inches | | Item Weight | 0.01 Ounces | | Item dimensions L x W x H | 5.8 x 4.2 x 0.5 inches | | Manufacturer | Sonnax | | Manufacturer Part Number | 77754-41 | | Material | Metal | | Material Type | Metal | | Model Number | 77754-41 | | Outlet Connection Size | 4.2 Inches | | Outlet Connection Type | Flare | | Size | 4.2 x 5.8 x 0.5 inches | | Unit Count | 1 Count | | Valve Type | shift valve | ## Images ![Sonnax HD 2-3 Shift Valve - Image 1](https://m.media-amazon.com/images/I/31JHd4KCTpL.jpg) ## Customer Reviews ### ā­ā­ā­ā­ā­ What can I say except, It's Sonnax !! *by J***Y on July 29, 2022* Sweet valve, when you're in D3 this valve makes your overrun clutches come on in 2nd and 3rd gear also. I wasn't crazy about drilling a small hole in my valvebody, but they are plentiful if you mess it up or if you ever want to go back to stock. Kind of causes a harsh 2nd to 3rd downshift while coming to a stop, but while you are in D4 can't tell any difference. Look on the internet if you're not sure where to drill, took me picture after picture before I finally decided where to drill. ### ā­ā­ā­ā­ā­ Nice for towing *by J***N on August 5, 2020* Used during 4l60e rebuild along with complete Sonnax Servo and performance pack. It may seem pricey to purchase all but it seems to have hell of a lot of holding power. Converter lockup now is unreal. No flair during shifts. Down shifts are nice and noticeable along with this item installed. Makes it nice Slowing down while towing. Shifts are firm and noticeable from 1-2 but the rest are quick with no flair or lag. Iā€™m very pleased with complete package. Items were Installed on 1/2 ton 4x4 suburban. ### ā­ā­ā­ā­ Four Stars *by S***1 on June 17, 2016* works amazing and shifts awesome! --- ## Why Shop on Desertcart? - šŸ›’ **Trusted by 1.3+ Million Shoppers** ā€” Serving international shoppers since 2016 - šŸŒ **Shop Globally** ā€” Access 737+ million products across 21 categories - šŸ’° **No Hidden Fees** ā€” All customs, duties, and taxes included in the price - šŸ”„ **15-Day Free Returns** ā€” Hassle-free returns (30 days for PRO members) - šŸ”’ **Secure Payments** ā€” Trusted payment options with buyer protection - ā­ **TrustPilot Rated 4.5/5** ā€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.co.uk/products/24710278-sonnax-hd-2-3-shift-valve](https://www.desertcart.co.uk/products/24710278-sonnax-hd-2-3-shift-valve) --- *Product available on Desertcart United Kingdom* *Store origin: GB* *Last updated: 2026-06-22*