--- product_id: 173288257 title: "JEGS Transmission Double-Hump Crossmember | Fits 700-R4, 4L60, and 4L60E Transmissions | Fits Most GM G-Body Applications Equipped With Small Block Chevy Engine | Black Powder Coated Finish" brand: "jegs" price: "9657546₫" currency: VND in_stock: true reviews_count: 4 url: https://www.desertcart.vn/products/173288257-jegs-transmission-double-hump-crossmember-fits-700-r4-4l60-4l60e store_origin: VN region: Vietnam --- # Durable black powder-coated steel Double-hump design for dual exhaust Fits 700-R4, 4L60 & 4L60E transmissions JEGS Transmission Double-Hump Crossmember | Fits 700-R4, 4L60, and 4L60E Transmissions | Fits Most GM G-Body Applications Equipped With Small Block Chevy Engine | Black Powder Coated Finish **Brand:** jegs **Price:** 9657546₫ **Availability:** ✅ In Stock ## Summary > 🛠️ Upgrade your G-Body drivetrain with confidence and style! ## Quick Answers - **What is this?** JEGS Transmission Double-Hump Crossmember | Fits 700-R4, 4L60, and 4L60E Transmissions | Fits Most GM G-Body Applications Equipped With Small Block Chevy Engine | Black Powder Coated Finish by jegs - **How much does it cost?** 9657546₫ with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.vn](https://www.desertcart.vn/products/173288257-jegs-transmission-double-hump-crossmember-fits-700-r4-4l60-4l60e) ## Best For - jegs enthusiasts ## Why This Product - Trusted jegs brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Built to Last:** Black powder-coated steel finish ensures strength, corrosion resistance, and a sleek look under your ride. - • **Essential Upgrade:** A must-have for transmission swaps—boost performance and maintain factory-style fitment. - • **Dual-Exhaust Ready:** Double-hump crossmember design lets you upgrade to dual exhaust without hassle. - • **Perfect G-Body Fit:** Tailored for 1978-1988 GM G-body cars like Malibu, Monte Carlo, and Grand National for seamless compatibility. - • **Transmission Versatility:** Supports popular 700-R4, 4L60, and 4L60E transmissions for your swap needs. ## Overview The JEGS Transmission Double-Hump Crossmember is engineered for 1978-1988 GM G-body vehicles equipped with small block Chevy engines. Designed to fit 700-R4, 4L60, and 4L60E transmissions, it features a double-hump design that accommodates dual exhaust upgrades. Constructed from black powder-coated steel, this durable crossmember offers strength, corrosion resistance, and a clean finish—making it an essential upgrade for professional-grade transmission swaps. ## Description Transmission Crossmember700R4, 4L60, 4L60E1978-88 Malibu/Regal/Cutlass/Monte Carlo/Grand Prix/GNDoes not fit Cutlass Supreme or El Camino Models Installation Notes:Some 1983 Hurst Oldsmobiles were originally equipped with a 2004R transmission and will not require this frame extension. If you are unsure, 1984 and later models will feature two mounting locations for the transmission crossmember approximately 14 in. behind the front set of mounting holes.Crossmember is designed for 1978-1988 G-Bodys that were originally equipped with an SB-Chevy. Does not fit Cutlass Supreme models or El Camino. Engine and transmission swaps may require some additional modifications & fitment of components. Hardware is not included. ## Features - DOUBLE-HUMP DESIGN allows dual exhaust upgrade for your vehicle - COMPATIBLE WITH THE FOLLOWING APPLICATIONS: 1978 - 1988 GM G-body vehicles including Chevrolet Malibu, Monte Carlo, Buick Regal and Grand National, Oldsmobile Cutlass, and Pontiac Grand Prix. WILL NOT FIT Olds Cutlass Supreme, Chevy El Camino models, or frames that do not have an extension on the driver side back to approximately the transmission mount. - FITS 700-R4, 4L60, and 4L60E Transmissions - BLACK POWDER COATED STEEL for strength, great looks, and long life - MUST HAVE UPGRADE for transmission swaps ## Technical Specifications | Specification | Value | |---------------|-------| | Manufacturer | JEGS | | UPC | 889944070757 | | Item Weight | 16 pounds | | Product Dimensions | 49.6 x 10.1 x 4 inches | | Item model number | 55566-560601 | | Manufacturer Part Number | 640601 | | OEM Part Number | 640601 | ## Product Details - **Brand:** JEGS - **Material:** Alloy Steel - **Item dimensions L x W x H:** 49.6 x 10.1 x 4 inches - **Item Weight:** 16 Pounds - **Item Depth:** 49.6 inches ## Images ![JEGS Transmission Double-Hump Crossmember | Fits 700-R4, 4L60, and 4L60E Transmissions | Fits Most GM G-Body Applications Equipped With Small Block Chevy Engine | Black Powder Coated Finish - Image 1](https://m.media-amazon.com/images/I/418hpOFS4bL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ 5.0 out of 5 stars Cross memeber gbody *by C***S on Reviewed in the United States on March 11, 2024* Works great ### ⭐⭐⭐⭐⭐ 5.0 out of 5 stars Perfect fit *by B***L on Reviewed in the United States on February 27, 2020* 79 Malibu G body? or A special? Depending on who you ask. 6.0 Ls swap, 4L60E. Decent welds, strong, no drilling extra holes,no problems at all. Shipped faster then expected, bubble wrapped. Couldn't get any easy'er or better fit. ### ⭐⭐⭐⭐⭐ 5.0 out of 5 stars Super solid heavy duty frame . *by A***R on Reviewed in the United States on August 29, 2022* Solid sturdy durable fully welded structure. --- ## 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.vn/products/173288257-jegs-transmission-double-hump-crossmember-fits-700-r4-4l60-4l60e](https://www.desertcart.vn/products/173288257-jegs-transmission-double-hump-crossmember-fits-700-r4-4l60-4l60e) --- *Product available on Desertcart Vietnam* *Store origin: VN* *Last updated: 2026-06-07*