{"id":240009,"date":"2026-10-14T07:45:35","date_gmt":"2026-10-14T14:45:35","guid":{"rendered":"https:\/\/www.carparts.com\/blog\/?p=240009"},"modified":"2026-10-14T07:45:37","modified_gmt":"2026-10-14T14:45:37","slug":"how-to-change-a-differential-cover-quickref","status":"publish","type":"post","link":"https:\/\/www.carparts.com\/blog\/how-to-change-a-differential-cover-quickref\/","title":{"rendered":"How To Change a Differential Cover"},"content":{"rendered":"<!DOCTYPE html PUBLIC \"-\/\/W3C\/\/DTD HTML 4.0 Transitional\/\/EN\" \"http:\/\/www.w3.org\/TR\/REC-html40\/loose.dtd\">\n<html><body><span class=\"span-reading-time rt-reading-time\" style=\"display: block;\"><span class=\"rt-label rt-prefix\">Reading Time: <\/span> <span class=\"rt-time\"> 4<\/span> <span class=\"rt-label rt-postfix\">minutes<\/span><\/span>\n<p class=\"wp-block-paragraph\">To replace a <a href=\"https:\/\/www.carparts.com\/differential-cover\" target=\"_blank\" rel=\"noopener\" aria-label=\"differential cover\">differential cover<\/a>, drain the gear oil, unbolt and pry off the old cover, clean the housing, scrape the mating surface, seal the new cover with Room-Temperature Vulcanizing (RTV) silicone or a gasket, torque the bolts to spec, and refill with the correct gear oil. Basic hand tools cover the whole job.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The differential cover is the bolt-on plate that closes off the axle housing. It keeps gear oil around the <a href=\"https:\/\/www.carparts.com\/blog\/what-are-hypoid-gears\/\" target=\"_blank\" rel=\"noopener\" aria-label=\"ring and pinion gears\">ring and pinion gears<\/a> and keeps dirt and water out. When it cracks or seeps, the differential can run low and <a href=\"https:\/\/www.carparts.com\/blog\/bad-differential-symptoms-replacement-cost-faq\/\" target=\"_blank\" rel=\"noopener\" aria-label=\"wear out its gears\">wear out its gears<\/a>.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Key Takeaways<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>A leaking differential cover can lead to low gear oil and internal gear damage if you ignore it.<\/li>\n\n\n\n<li>Loosen the fill plug before you drain, so you know you can refill the differential.<\/li>\n\n\n\n<li>A clean, smooth mating surface matters more than the amount of sealant you use.<\/li>\n\n\n\n<li>Torque the cover bolts to the manufacturer&rsquo;s spec in a crisscross pattern.<\/li>\n\n\n\n<li>Use the gear oil weight, type, and capacity your vehicle maker specifies.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">When a Differential Cover Needs Replacement<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Replace the cover when it leaks, cracks, or takes a hit that bends it. Common signs include wet, grimy gear oil around the cover&rsquo;s edge, <a href=\"https:\/\/www.carparts.com\/blog\/rear-differential-leaks-symptoms-causes-and-what-to-do\/\" target=\"_blank\" rel=\"noopener\" aria-label=\"drips under the axle\">drips under the axle<\/a>, a dent from a rock, and rust eating through the metal.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A resealed cover that keeps leaking often points to a warped flange or a hairline crack, so a new cover makes more sense than adding more sealant. Some owners also upgrade to a heavy-duty cover for off-road protection.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Check That Your Axle Has a Bolt-On Cover<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Look for a ring of bolts around the center section before you buy parts. If you see them, this is a driveway job.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Not every axle works this way. Some designs, including the rear axles on many Toyota pickups, use a <a href=\"https:\/\/www.carparts.com\/differential\" target=\"_blank\" rel=\"noopener\" aria-label=\"drop-out carrier\">drop-out carrier<\/a> (often called a third member) that bolts in from the front, while welds seal the back of the housing. On these axles, a crack in the back of the housing calls for a fabricator or a <a href=\"https:\/\/www.carparts.com\/axle-housing\" target=\"_blank\" rel=\"noopener\" aria-label=\"replacement axle housing\">replacement axle housing<\/a>, not a cover swap.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Tools and Supplies You&rsquo;ll Need<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Tools<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/www.carparts.com\/floor-jack\" target=\"_blank\" rel=\"noopener\" aria-label=\"Floor jack\">Floor jack<\/a> and <a href=\"https:\/\/www.carparts.com\/jack-stand\" target=\"_blank\" rel=\"noopener\" aria-label=\"jack stands\">jack stands<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/www.carparts.com\/torque-wrench\" target=\"_blank\" rel=\"noopener\" aria-label=\"Torque wrench\">Torque wrench<\/a><\/li>\n\n\n\n<li>Ratchet, sockets, and a combination wrench for hard-to-reach bolts<\/li>\n\n\n\n<li>3\/8-inch drive extension, which fits many square-drive drain and fill plugs<\/li>\n\n\n\n<li>Gasket scraper or razor blade<\/li>\n\n\n\n<li>Oil drain pan<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Supplies<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Replacement differential cover, plus a <a href=\"https:\/\/www.carparts.com\/differential-cover-gasket\" target=\"_blank\" rel=\"noopener\" aria-label=\"gasket\">gasket<\/a> if your application uses one<\/li>\n\n\n\n<li><a href=\"https:\/\/www.carparts.com\/gasket-maker\" target=\"_blank\" rel=\"noopener\" aria-label=\"Silicone gasket maker\">Silicone gasket maker<\/a> (RTV) rated for gear oil<\/li>\n\n\n\n<li><a href=\"https:\/\/www.carparts.com\/brake-cleaner\" target=\"_blank\" rel=\"noopener\" aria-label=\"Brake cleaner\">Brake cleaner<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/www.carparts.com\/gear-oil\" target=\"_blank\" rel=\"noopener\" aria-label=\"Gear oil\">Gear oil<\/a> in the correct weight and chemistry<\/li>\n\n\n\n<li>Teflon tape or new plug washers<\/li>\n\n\n\n<li>Shop towels<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">How To Change a Rear Differential Cover Step-by-Step<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Keep everything clean, since most repeat leaks trace back to a dirty sealing surface or unevenly torqued bolts.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Raise and Support the Vehicle<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Set your vehicle on jack stands rated for its weight, and never work under one that&rsquo;s sitting only on a jack. Keep the axle close to level so you can judge the fill level accurately. If you&rsquo;ve just driven, let the axle cool first.<\/p>\n\n\n\n\n\n<div class=\"article-search-widget\">\n\t<div class=\"cp-search\">\n\t\t<div class=\"cp-logo-search\" align=\"center\">\n\t\t\t<img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/cld.partsimg.com\/image\/upload\/w_auto,dpr_auto\/carparts\/logos\/badge_wordmark\/full_color\/CP_LOGO_COLOUR_RGB\" alt=\"CarParts.com\" width=\"300\" height=\"56\">\n\t\t<\/div>\n\t\t<form id=\"cpsearchform\" name=\"cpsearchform\" action=\"https:\/\/www.carparts.com\/search\" method=\"get\" target=\"_blank\" accept-charset=\"character_set\" aria-label=\"search CarParts.com\">\n\t\t\t<input type=\"text\" class=\"keyword\" name=\"q\" placeholder=\"Search for parts on CarParts.com\" value=\"\" aria-label=\"Search CarParts.com\"><input type=\"submit\" class=\"btn-search\" value=\"Search\" aria-label=\"Search\">\n\t\t<\/form>\n\t<\/div>\n<\/div>\n\n\n\n<h3 class=\"wp-block-heading\">Loosen the Fill Plug First<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Crack the <a href=\"https:\/\/www.carparts.com\/axle-housing-fill-plug\" target=\"_blank\" rel=\"noopener\" aria-label=\"fill plug\">fill plug<\/a> loose before you drain anything. If it&rsquo;s seized, you&rsquo;ll find out while the differential still has oil in it, not after it&rsquo;s empty.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Drain the Oil and Remove the Bolts<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Set the drain pan in place, remove the <a href=\"https:\/\/www.carparts.com\/differential-drain-plug\" target=\"_blank\" rel=\"noopener\" aria-label=\"drain plug\">drain plug<\/a> if your cover has one, and let the oil drain fully. Then remove the bolts around the cover&rsquo;s perimeter.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">No drain plug? Leave one or two top bolts loosely threaded, pry the bottom of the cover open, and let the oil run out. A gasket scraper can help break the seal. If you decide to use a razor blade,go easy with it, since a gouge in the housing flange can create a leak path.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Clean the Housing and Inspect the Gears<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Spray brake cleaner over the housing and gears from top to bottom to flush out old, sticky oil. It evaporates quickly and doesn&rsquo;t leave residue.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Then look for chipped or broken teeth, heavy pitting, and metal chunks. Fine gray paste on a magnet is typical wear. But large shards or missing teeth aren&rsquo;t, so have the differential inspected before you close it.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Scrape the Mating Surfaces<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Remove all old gasket material and RTV from the housing flange without gouging it. Finish with a swipe of brake cleaner so that the surface is dry and oil-free.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Seal and Install the New Cover<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Run a continuous bead of RTV around the cover&rsquo;s sealing surface, tracing inside each bolt hole so the bead circles it. If your cover uses a gasket, follow the gasket maker&rsquo;s directions instead.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Press the cover into place and thread in a bolt right away to anchor it. Hand-tighten the remaining bolts.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Torque the Bolts and Reinstall the Drain Plug<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Tighten the bolts in a crisscross pattern to the manufacturer&rsquo;s torque spec. Uneven tightening can squeeze sealant out of one side and leave a gap on the other.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Wrap tapered-thread plugs with Teflon tape. If your vehicle&rsquo;s plugs use a crush washer or O-ring, replace it instead. Torque the drain plug to spec.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Refill With the Correct Gear Oil<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Give the RTV the cure time listed on its label. Then fill through the fill port until oil reaches the bottom edge of the hole, and reinstall the fill plug.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Check your owner&rsquo;s manual for viscosity, type, and capacity. Some differentials call for full synthetic oil, while some limited-slip units need conventional oil with a <a href=\"https:\/\/www.carparts.com\/blog\/what-is-differential-gear-oil-uses-costs-and-other-related-faqs\/\" target=\"_blank\" rel=\"noopener\" aria-label=\"friction modifier\">friction modifier<\/a>. The wrong fluid can cause chatter or internal damage. Take the old oil to a facility that accepts used fluids.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">After a short drive and a cooldown, check for fresh seepage. If you hear new whining, grinding, or clunking, have the axle inspected, since the differential sends <a href=\"https:\/\/www.carparts.com\/blog\/what-is-a-rear-differential-function-types-service-and-failure-signs-quickref\/\" target=\"_blank\" rel=\"noopener\" aria-label=\"power to the wheels\">power to the wheels<\/a>.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">FAQs<\/h2>\n\n\n\n<div class=\"schema-faq wp-block-yoast-faq-block\"><div class=\"schema-faq-section\" id=\"faq-question-1791988585617\"><strong class=\"schema-faq-question\">Do I need a gasket or RTV for a differential cover?<\/strong> <p class=\"schema-faq-answer\">It depends on the cover. Many factory covers seal with RTV only, while some replacement covers come with a reusable gasket. Use one method, not both, unless the cover maker says otherwise.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1791988599215\"><strong class=\"schema-faq-question\">Can I use these steps when replacing differential fluid only?<\/strong> <p class=\"schema-faq-answer\">Yes. Follow the same process and reuse your original cover if it&rsquo;s straight and crack-free. If your cover has both a drain plug and a fill plug, you can often <a href=\"https:\/\/www.carparts.com\/blog\/helpful-tips-for-differential-fluid-change\/\" target=\"_blank\" rel=\"noopener\" aria-label=\"change the oil\">change the oil<\/a> without pulling it.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1791988616528\"><strong class=\"schema-faq-question\">Can I drive with a leaking differential cover?<\/strong> <p class=\"schema-faq-answer\">A slow seep isn&rsquo;t an emergency, but it shouldn&rsquo;t wait. Running a differential low on oil can damage the gears and turn a small job into a big one.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1791988631487\"><strong class=\"schema-faq-question\">Why does my new differential cover still leak?<\/strong> <p class=\"schema-faq-answer\">Check the bolt torque first, then look for a dirty flange or a bead that didn&rsquo;t fully circle a bolt hole. Adding oil before the sealant cures and a bent cover can also break the seal.<\/p> <\/div> <\/div>\n\n\n\n<h2 class=\"wp-block-heading\">Find the Right Differential Cover for Your Vehicle<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A solid differential cover keeps gear oil where it belongs and protects the gears that drive your wheels. <a href=\"https:\/\/www.carparts.com\" target=\"_blank\" rel=\"noopener\" aria-label=\"CarParts.com\">CarParts.com<\/a> carries <a href=\"https:\/\/www.carparts.com\/differential-cover\" target=\"_blank\" rel=\"noopener\" aria-label=\"replacement differential covers\">replacement differential covers<\/a>, gaskets, and gear oil for a wide range of cars, trucks, and SUVs. Enter your vehicle&rsquo;s year, make, and model to find parts that fit, and seal the axle to get your ride back on the road.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n<\/body><\/html>\n","protected":false},"excerpt":{"rendered":"<p><span class=\"span-reading-time rt-reading-time\" style=\"display: block;\"><span class=\"rt-label rt-prefix\">Reading Time: <\/span> <span class=\"rt-time\"> 4<\/span> <span class=\"rt-label rt-postfix\">minutes<\/span><\/span>To replace a differential cover, drain the gear oil, unbolt and pry off the old cover, clean the housing, scrape&#8230; <a href=\"https:\/\/www.carparts.com\/blog\/how-to-change-a-differential-cover-quickref\/\" rel=\"nofollow\">Read More<\/a><\/p>\n","protected":false},"author":1665,"featured_media":240010,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":true,"_genesis_hide_title":false,"_genesis_hide_breadcrumbs":false,"_genesis_hide_singular_image":false,"_genesis_hide_footer_widgets":false,"_genesis_custom_body_class":"","_genesis_custom_post_class":"","_genesis_layout":"","footnotes":"","_ppma_block_editor_authors":"{\"authors\":[2607],\"author_categories\":{\"2607\":\"1\"},\"fallback_author_user\":\"1665\",\"ppma_author_box_select\":\"\",\"selected_authors\":[{\"id\":2607,\"display_name\":\"CarParts.com Research Team\",\"is_guest\":0,\"category_id\":\"1\"}]}"},"categories":[1034,3757],"tags":[1976,4788,4790,4789,3852],"ppma_author":[2607],"class_list":["post-240009","post","type-post","status-publish","format-standard","has-post-thumbnail","category-auto-repair","category-drivetrain","tag-differential-cover","tag-differential-cover-gasket","tag-differential-drain-plug","tag-gasket-maker","tag-gear-oil","entry"],"acf":{"adrotate_specific_mobile_ad":"","adrotate_specific_desktop_ad":""},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.7 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>How To Change a Differential Cover - In The Garage with CarParts.com<\/title>\n<meta name=\"description\" content=\"Drain the gear oil, swap the cover, reseal it, torque the bolts, and refill. Here&#039;s the full DIY process, tools, and common mistakes.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.carparts.com\/blog\/how-to-change-a-differential-cover-quickref\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"How To Change a Differential Cover - In The Garage with CarParts.com\" \/>\n<meta property=\"og:description\" content=\"Drain the gear oil, swap the cover, reseal it, torque the bolts, and refill. Here&#039;s the full DIY process, tools, and common mistakes.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.carparts.com\/blog\/how-to-change-a-differential-cover-quickref\/\" \/>\n<meta property=\"og:site_name\" content=\"In The Garage with CarParts.com\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/carpartscom\" \/>\n<meta property=\"article:published_time\" content=\"2026-10-14T14:45:35+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-10-14T14:45:37+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2026\/10\/How_To_Change_a_Differential_Cover.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"900\" \/>\n\t<meta property=\"og:image:height\" content=\"599\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"CarParts.com Research Team\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@carpartscom\" \/>\n<meta name=\"twitter:site\" content=\"@carpartscom\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"alorenzo@carparts.com\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"6 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/how-to-change-a-differential-cover-quickref\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/how-to-change-a-differential-cover-quickref\\\/\"},\"author\":[{\"@type\":\"Person\",\"$id\":\"1665\",\"name\":\"CarParts.com Research Team\",\"jobTitle\":\"Expert Automotive Writer\",\"description\":\"The CarParts.com Research Team is composed of experienced automotive and tech writers working with (ASE)-certified automobile technicians and automotive journalists to bring up-to-date, helpful information to car owners in the US. 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