{"id":4030,"date":"2025-07-09T14:15:44","date_gmt":"2025-07-09T14:15:44","guid":{"rendered":"https:\/\/generaltruckparts.com\/?post_type=product&#038;p=3989"},"modified":"2025-11-11T17:22:09","modified_gmt":"2025-11-11T17:22:09","slug":"dana-dd404-411","status":"publish","type":"product","link":"https:\/\/generaltruckparts.com\/shop\/differential-axle\/differential-assemblies\/dana-dd404-411\/","title":{"rendered":"Dana\/Spicer DD404-411 Differential"},"content":{"rendered":"<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<p>The <strong>Dana Spicer DD404-411<\/strong> is a tandem-drive axle differential designed for demanding heavy-duty truck applications. Known for its reliability, strength, and ease of service, the DD404 is ideal for fleets requiring consistent performance, high load capacity, and a low cost of ownership.<\/p>\n<p>Built with hypoid gearing for quiet and efficient operation, the DD404 features a double-drive configuration\u2014meaning both axles are powered\u2014providing increased traction and performance in both highway and vocational settings. With a gross axle weight rating (GAWR) of 40,000 lbs, this axle is built to endure high-stress conditions including linehaul, construction, and refuse operations.<\/p>\n<p>Thanks to its modular carrier design, wide gear ratio options, and compatibility with common suspension systems, the DD404 remains a popular, versatile solution for truck OEMs and aftermarket fleets alike.<\/p>\n<h5><strong>Technical Specifications<\/strong><\/h5>\n<h6><strong>General Features:<\/strong><\/h6>\n<ul>\n<li>Double-drive tandem axle for heavy-duty truck applications<\/li>\n<li>Designed for on-highway and vocational use<\/li>\n<li>Proven hypoid gear design for quiet operation and durability<\/li>\n<\/ul>\n<h6><strong>Axle Rating &amp; Load Capacity:<\/strong><\/h6>\n<ul>\n<li>Gross Axle Weight Rating (GAWR): 40,000 lbs (18,144 kg)<\/li>\n<li>Ideal for Class 8 trucks and severe-service environments<\/li>\n<\/ul>\n<h6><strong>Gear Design and Ratios:<\/strong><\/h6>\n<ul>\n<li>Gear Type: Single-reduction, hypoid gearing<\/li>\n<li>Ring Gear Diameter: 15.25 inches (387 mm)<\/li>\n<li>Input Shaft Spline Count: 39-spline (standard)<\/li>\n<li>Available Gear Ratios:\n<ul>\n<li>3.08, 3.21, 3.36, 3.55, 3.70, 3.90, 4.10, 4.33, 4.63, 4.88, 5.29<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h6><strong>Construction and Materials:<\/strong><\/h6>\n<ul>\n<li>Carrier Housing: Cast ductile iron for strength and heat dissipation<\/li>\n<li>Heat-treated alloy steel gears for long service life<\/li>\n<li>Rugged, high-strength axle shafts for durability under high load<\/li>\n<\/ul>\n<h6><strong>Lubrication and Cooling:<\/strong><\/h6>\n<ul>\n<li>Integrated pressurized lubrication system for efficient oil flow<\/li>\n<li>Optional lubrication pump available for extended service cycles<\/li>\n<li>Oil Capacity: Approx. 16\u201318 quarts per axle (depending on housing and configuration)<\/li>\n<\/ul>\n<h6><strong>Differential Lock and Traction:<\/strong><\/h6>\n<ul>\n<li>Standard inter-axle differential (power divider) for torque distribution<\/li>\n<li>Optional driver-controlled differential lock for improved traction in off-road or slippery conditions<\/li>\n<\/ul>\n<h6><strong>Suspension &amp; Brake Compatibility:<\/strong><\/h6>\n<ul>\n<li>Compatible with multiple suspensions: air ride, leaf spring, walking beam<\/li>\n<li>ABS sensor-ready hub options available<\/li>\n<li>Multiple track widths and housing configurations available for OEM flexibility<\/li>\n<\/ul>\n<h6><strong>Serviceability and Maintenance:<\/strong><\/h6>\n<ul>\n<li>Modular carrier design simplifies removal and servicing<\/li>\n<li>Commonality with Dana 404-family components reduces parts inventory needs<\/li>\n<li>Designed for long service intervals and ease of maintenance<\/li>\n<\/ul>\n<h5><strong>Applications:<\/strong><\/h5>\n<ul>\n<li>Freight and linehaul trucks<\/li>\n<li>Refuse and sanitation vehicles<\/li>\n<li>Dump and construction trucks<\/li>\n<li>Logging and forestry operations<\/li>\n<li>General vocational applications<\/li>\n<\/ul>\n<h5><strong>Key Benefits:<\/strong><\/h5>\n<ul>\n<li>Reliable, proven 40,000 lb GAWR performance<\/li>\n<li>Quiet and efficient hypoid gear operation<\/li>\n<li>Wide ratio range allows performance and fuel economy optimization<\/li>\n<li>Easy service and low downtime with modular carrier design<\/li>\n<li>Trusted by OEMs and fleets across North America<\/li>\n<\/ul>\n<div class=\"wp-block-buttons is-content-justification-center is-layout-flex wp-container-core-buttons-is-layout-a89b3969 wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button\"><a class=\"wp-block-button__link has-primary-background-color has-background wp-element-button\" href=\"https:\/\/generaltruckparts.com\/wp-content\/uploads\/2025\/05\/Dana-Differentials-Manual.pdf\">DOWNLOAD DD404 MANUAL<\/a><\/div>\n<\/div>\n<\/div>\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<div class=\"wp-block-group has-global-padding is-layout-constrained wp-block-group-is-layout-constrained\">\n<div class=\"wp-block-spacer\" aria-hidden=\"true\"><\/div>\n<div class=\"wp-block-group has-background has-global-padding is-layout-constrained wp-block-group-is-layout-constrained\">\n<figure class=\"wp-block-table aligncenter tightener has-medium-font-size\">\n<table>\n<tbody>\n<tr>\n<td><img decoding=\"async\" class=\" ls-is-cached lazyloaded\" src=\"https:\/\/sp-ao.shortpixel.ai\/client\/to_webp,q_glossy,ret_img\/https:\/\/generaltruckparts.com\/\/wp-content\/uploads\/2025\/04\/phone-icon16.png\" alt=\"Phone \" data-src=\"https:\/\/sp-ao.shortpixel.ai\/client\/to_webp,q_glossy,ret_img\/https:\/\/generaltruckparts.com\/\/wp-content\/uploads\/2025\/04\/phone-icon16.png\" \/><\/td>\n<td><strong>800-621-3914<\/strong><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/figure>\n<div class=\"wp-block-buttons is-content-justification-center is-layout-flex wp-container-core-buttons-is-layout-a89b3969 wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button\"><a class=\"wp-block-button__link has-primary-background-color has-background wp-element-button\" href=\"https:\/\/generaltruckparts.com\/support\/request-a-quote\/\">REQUEST A QUOTE<\/a><\/div>\n<\/div>\n<\/div>\n<\/div>\n<div><\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p class=\"ai-optimize-28\">The Dana Spicer DD404-411 is a tandem-drive axle differential designed for demanding heavy-duty truck 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