{"id":5926,"date":"2026-04-22T09:54:22","date_gmt":"2026-04-22T09:54:22","guid":{"rendered":"http:\/\/ql-autoparts.com\/?post_type=product&#038;p=5926"},"modified":"2026-04-22T09:54:22","modified_gmt":"2026-04-22T09:54:22","slug":"wg221004000010104206-fifth-gear-overspeed","status":"publish","type":"product","link":"http:\/\/ql-autoparts.com\/ru\/product\/wg221004000010104206-fifth-gear-overspeed\/","title":{"rendered":"WG221004000010(104206) Fifth gear (overspeed)"},"content":{"rendered":"<p data-start=\"143\" data-end=\"306\">The WG221004000010 5th Gear (Overdrive Gear) is a core transmission component in heavy-duty truck gearboxes, specially designed for high-speed cruising conditions.<\/p>\n<p data-start=\"308\" data-end=\"572\">It enables overdrive operation, allowing the vehicle to run at higher speed while reducing engine RPM, improving fuel efficiency and reducing engine wear. It is widely used in long-distance logistics trucks operating under continuous high-speed driving conditions.<\/p>\n<p data-start=\"308\" data-end=\"572\"><img alt=\"\" fetchpriority=\"high\" decoding=\"async\" class=\"size-full wp-image-5930 aligncenter\" src=\"http:\/\/ql-autoparts.com\/wp-content\/uploads\/2026\/04\/2-16.webp\" width=\"600\" height=\"400\" srcset=\"http:\/\/ql-autoparts.com\/wp-content\/uploads\/2026\/04\/2-16.webp 600w, http:\/\/ql-autoparts.com\/wp-content\/uploads\/2026\/04\/2-16-300x200.webp 300w, http:\/\/ql-autoparts.com\/wp-content\/uploads\/2026\/04\/2-16-18x12.webp 18w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/p>\n<h2 data-section-id=\"ljpc74\" data-start=\"579\" data-end=\"598\">Core Function<\/h2>\n<ul data-start=\"599\" data-end=\"850\">\n<li data-section-id=\"a62emu\" data-start=\"599\" data-end=\"642\">Enables 5th gear overdrive transmission<\/li>\n<li data-section-id=\"bu44li\" data-start=\"643\" data-end=\"689\">Reduces engine RPM during highway cruising<\/li>\n<li data-section-id=\"1fxzy4g\" data-start=\"690\" data-end=\"744\">Improves fuel economy and reduces fuel consumption<\/li>\n<li data-section-id=\"p1ffsj\" data-start=\"745\" data-end=\"790\">Ensures smooth high-speed torque delivery<\/li>\n<li data-section-id=\"13sr9ub\" data-start=\"791\" data-end=\"850\">Maintains stable and efficient transmission performance<\/li>\n<\/ul>\n<h2 data-section-id=\"p6k24r\" data-start=\"857\" data-end=\"881\">Product Advantages<\/h2>\n<h3 data-section-id=\"cdug7d\" data-start=\"883\" data-end=\"916\">\u25cf Overdrive Gear Ratio Design<\/h3>\n<p data-start=\"917\" data-end=\"1014\">This gear adopts a <strong data-start=\"936\" data-end=\"966\">high-speed overdrive ratio<\/strong>, where output speed is higher than input speed.<\/p>\n<p data-start=\"1016\" data-end=\"1025\">Benefits:<\/p>\n<ul data-start=\"1026\" data-end=\"1180\">\n<li data-section-id=\"1vtyx1i\" data-start=\"1026\" data-end=\"1064\">Lower engine RPM at cruising speed<\/li>\n<li data-section-id=\"1wqn1zn\" data-start=\"1065\" data-end=\"1093\">Reduced fuel consumption<\/li>\n<li data-section-id=\"yie9cr\" data-start=\"1094\" data-end=\"1134\">Less engine wear and heat generation<\/li>\n<li data-section-id=\"vcig0g\" data-start=\"1135\" data-end=\"1180\">Ideal for long-distance highway transport<\/li>\n<\/ul>\n<h3 data-section-id=\"a400ce\" data-start=\"1187\" data-end=\"1227\">\u25cf High-Strength 20CrMnTi Alloy Steel<\/h3>\n<p data-start=\"1228\" data-end=\"1296\">Made from <strong data-start=\"1238\" data-end=\"1284\">20CrMnTi low-carbon alloy structural steel<\/strong>, featuring:<\/p>\n<ul data-start=\"1297\" data-end=\"1429\">\n<li data-section-id=\"156dy5y\" data-start=\"1297\" data-end=\"1332\">Fine and dense forged structure<\/li>\n<li data-section-id=\"1f75x9o\" data-start=\"1333\" data-end=\"1378\">Excellent toughness and impact resistance<\/li>\n<li data-section-id=\"4jc7xa\" data-start=\"1379\" data-end=\"1429\">Strong load-bearing capacity under high torque<\/li>\n<\/ul>\n<p data-start=\"1431\" data-end=\"1452\">After heat treatment:<\/p>\n<ul data-start=\"1453\" data-end=\"1590\">\n<li data-section-id=\"bczr91\" data-start=\"1453\" data-end=\"1485\">Deep carburizing + quenching<\/li>\n<li data-section-id=\"s8btxb\" data-start=\"1486\" data-end=\"1527\">High surface hardness with tough core<\/li>\n<li data-section-id=\"tzxwia\" data-start=\"1528\" data-end=\"1590\">Excellent fatigue resistance and anti-breakage performance<\/li>\n<\/ul>\n<h3 data-section-id=\"fbfkxf\" data-start=\"1597\" data-end=\"1632\">\u25cf Precision Hardened Gear Teeth<\/h3>\n<p data-start=\"1633\" data-end=\"1666\">Gear teeth are processed through:<\/p>\n<ul data-start=\"1667\" data-end=\"1728\">\n<li data-section-id=\"1rdzved\" data-start=\"1667\" data-end=\"1701\">Deep carburizing and quenching<\/li>\n<li data-section-id=\"1uv1ova\" data-start=\"1702\" data-end=\"1728\">CNC precision grinding<\/li>\n<\/ul>\n<p data-start=\"1730\" data-end=\"1753\">Performance advantages:<\/p>\n<ul data-start=\"1754\" data-end=\"1950\">\n<li data-section-id=\"1rfd2hl\" data-start=\"1754\" data-end=\"1806\">High wear resistance and anti-pitting capability<\/li>\n<li data-section-id=\"1jpv9jq\" data-start=\"1807\" data-end=\"1868\">Stable tooth profile under long-term high-speed operation<\/li>\n<li data-section-id=\"qu3r7e\" data-start=\"1869\" data-end=\"1905\">Reduced gear noise and vibration<\/li>\n<li data-section-id=\"16lmk8r\" data-start=\"1906\" data-end=\"1950\">No abnormal noise or whine at high speed<\/li>\n<\/ul>\n<h3 data-section-id=\"yzfxmp\" data-start=\"1957\" data-end=\"1999\">\u25cf Smooth Meshing &amp; Low Noise Operation<\/h3>\n<p data-start=\"2000\" data-end=\"2039\">Precision ground tooth surfaces ensure:<\/p>\n<ul data-start=\"2040\" data-end=\"2166\">\n<li data-section-id=\"3conc6\" data-start=\"2040\" data-end=\"2066\">Smooth gear engagement<\/li>\n<li data-section-id=\"ecp7c8\" data-start=\"2067\" data-end=\"2094\">Low transmission impact<\/li>\n<li data-section-id=\"61dr84\" data-start=\"2095\" data-end=\"2126\">Stable high-speed operation<\/li>\n<li data-section-id=\"9pjgen\" data-start=\"2127\" data-end=\"2166\">Reduced vibration and gearbox noise<\/li>\n<\/ul>\n<p data-start=\"2168\" data-end=\"2240\">This significantly improves driving comfort and transmission durability.<\/p>\n<h3 data-section-id=\"qskjyf\" data-start=\"2247\" data-end=\"2285\">\u25cf High-Precision Spline Connection<\/h3>\n<p data-start=\"2286\" data-end=\"2342\">The internal spline is processed by precision broaching:<\/p>\n<ul data-start=\"2343\" data-end=\"2471\">\n<li data-section-id=\"17vmgkg\" data-start=\"2343\" data-end=\"2381\">Uniform clearance with input shaft<\/li>\n<li data-section-id=\"et64po\" data-start=\"2382\" data-end=\"2429\">Strong torque transmission without slippage<\/li>\n<li data-section-id=\"1ooiyt3\" data-start=\"2430\" data-end=\"2471\">No looseness or power loss under load<\/li>\n<\/ul>\n<p data-start=\"2473\" data-end=\"2517\">Ensures efficient and stable power delivery.<\/p>\n<h3 data-section-id=\"11zhkz\" data-start=\"2524\" data-end=\"2563\">\u25cf Oil Bath Lubrication Optimization<\/h3>\n<p data-start=\"2564\" data-end=\"2601\">Designed for gearbox oil environment:<\/p>\n<ul data-start=\"2602\" data-end=\"2779\">\n<li data-section-id=\"1g29p92\" data-start=\"2602\" data-end=\"2647\">Fully lubricated gear teeth and root area<\/li>\n<li data-section-id=\"1bre6mx\" data-start=\"2648\" data-end=\"2673\">Fast heat dissipation<\/li>\n<li data-section-id=\"1fyev9g\" data-start=\"2674\" data-end=\"2718\">Prevents overheating and surface pitting<\/li>\n<li data-section-id=\"hwgm1m\" data-start=\"2719\" data-end=\"2779\">Stable operation during long-distance high-speed driving<\/li>\n<\/ul>\n<h2 data-section-id=\"a153ij\" data-start=\"2786\" data-end=\"2810\">Technical Features<\/h2>\n<ul data-start=\"2811\" data-end=\"3157\">\n<li data-section-id=\"14iass5\" data-start=\"2811\" data-end=\"2856\">Material: 20CrMnTi alloy structural steel<\/li>\n<li data-section-id=\"g0xqc7\" data-start=\"2857\" data-end=\"2912\">Heat treatment: Carburizing + quenching + tempering<\/li>\n<li data-section-id=\"1fh0omn\" data-start=\"2913\" data-end=\"2959\">Tooth surface: Hardened &amp; precision ground<\/li>\n<li data-section-id=\"1yd039o\" data-start=\"2960\" data-end=\"3008\">Gear type: Overdrive (high-speed gear ratio)<\/li>\n<li data-section-id=\"8pf8ah\" data-start=\"3009\" data-end=\"3055\">Machining: CNC grinding + spline broaching<\/li>\n<li data-section-id=\"1vapa42\" data-start=\"3056\" data-end=\"3112\">Surface treatment: Anti-rust coating (oil-resistant)<\/li>\n<li data-section-id=\"p2w8y6\" data-start=\"3113\" data-end=\"3157\">Designed for oil bath lubrication system<\/li>\n<\/ul>\n<h2 data-section-id=\"ovzyni\" data-start=\"3164\" data-end=\"3187\">Application Scope<\/h2>\n<ul data-start=\"3188\" data-end=\"3389\">\n<li data-section-id=\"khuofe\" data-start=\"3188\" data-end=\"3234\">Heavy-duty truck main transmission systems<\/li>\n<li data-section-id=\"1kud9qu\" data-start=\"3235\" data-end=\"3277\">Highway long-distance logistics trucks<\/li>\n<li data-section-id=\"12foylz\" data-start=\"3278\" data-end=\"3316\">Tractor units and freight carriers<\/li>\n<li data-section-id=\"1ctlrkr\" data-start=\"3317\" data-end=\"3353\">High-speed cruising applications<\/li>\n<li data-section-id=\"kftr1f\" data-start=\"3354\" data-end=\"3389\">OEM gearbox assembly and repair<\/li>\n<\/ul>\n<h2 data-section-id=\"lgpldt\" data-start=\"3396\" data-end=\"3422\">Performance Benefits<\/h2>\n<ul data-start=\"3423\" data-end=\"3614\">\n<li data-section-id=\"h2qaty\" data-start=\"3423\" data-end=\"3457\">Lower engine RPM at high speed<\/li>\n<li data-section-id=\"z4zx0o\" data-start=\"3458\" data-end=\"3486\">Significant fuel savings<\/li>\n<li data-section-id=\"1r1g59n\" data-start=\"3487\" data-end=\"3520\">Smooth and quiet transmission<\/li>\n<li data-section-id=\"1w8fxj2\" data-start=\"3521\" data-end=\"3566\">High load resistance without gear failure<\/li>\n<li data-section-id=\"1lu1x6k\" data-start=\"3567\" data-end=\"3614\">Reduced maintenance and longer service life<\/li>\n<\/ul>\n<h2 data-section-id=\"15pa784\" data-start=\"3621\" data-end=\"3643\">Supply &amp; Service<\/h2>\n<ul data-start=\"3644\" data-end=\"3816\">\n<li data-section-id=\"gsrc3h\" data-start=\"3644\" data-end=\"3687\">Ready stock available for fast delivery<\/li>\n<li data-section-id=\"1w9bs8s\" data-start=\"3688\" data-end=\"3719\">OEM customization supported<\/li>\n<li data-section-id=\"1bepie5\" data-start=\"3720\" data-end=\"3763\">Stable supply for long-term cooperation<\/li>\n<li data-section-id=\"1ywdgoo\" data-start=\"3764\" data-end=\"3816\">Technical support for installation and selection<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"<p>The WG221004000010(104206) fifth gear (overspeed) is the core transmission gear of the heavy truck gearbox. It is designed for high-speed cruising conditions and has outstanding advantages such as precise tooth profile, heavy-load wear resistance, smooth transmission, fuel saving and high efficiency. It is a key gear component to ensure stable high-speed driving in fifth gear, reduce engine speed and improve fuel economy.<\/p>","protected":false},"featured_media":5929,"template":"","meta":{"_seopress_robots_primary_cat":"","_seopress_titles_title":"WG221004000010 5th Gear Overdrive | Truck Transmission High-Speed Gear","_seopress_titles_desc":"WG221004000010 5th gear overdrive is a high-performance transmission gear for heavy-duty trucks. Made of 20CrMnTi steel with carburized and ground tooth surfaces, it ensures fuel-efficient high-speed cruising, smooth operation, and long service life.","_seopress_robots_index":"","site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"default","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}}},"product_brand":[],"product_cat":[139],"product_tag":[],"class_list":{"0":"post-5926","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-wg221004000010104206-5th-gear-overspeed","7":"desktop-align-center","8":"tablet-align-left","9":"mobile-align-left","10":"ast-product-gallery-layout-horizontal-slider","11":"ast-product-tabs-layout-horizontal","13":"first","14":"instock","15":"shipping-taxable","16":"product-type-simple"},"_links":{"self":[{"href":"http:\/\/ql-autoparts.com\/ru\/wp-json\/wp\/v2\/product\/5926","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/ql-autoparts.com\/ru\/wp-json\/wp\/v2\/product"}],"about":[{"href":"http:\/\/ql-autoparts.com\/ru\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"http:\/\/ql-autoparts.com\/ru\/wp-json\/wp\/v2\/media\/5929"}],"wp:attachment":[{"href":"http:\/\/ql-autoparts.com\/ru\/wp-json\/wp\/v2\/media?parent=5926"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"http:\/\/ql-autoparts.com\/ru\/wp-json\/wp\/v2\/product_brand?post=5926"},{"taxonomy":"product_cat","embeddable":true,"href":"http:\/\/ql-autoparts.com\/ru\/wp-json\/wp\/v2\/product_cat?post=5926"},{"taxonomy":"product_tag","embeddable":true,"href":"http:\/\/ql-autoparts.com\/ru\/wp-json\/wp\/v2\/product_tag?post=5926"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}