{"id":17057,"date":"2022-11-29T15:13:07","date_gmt":"2022-11-29T20:13:07","guid":{"rendered":"https:\/\/gm-techlink.com\/?p=17057"},"modified":"2022-11-29T15:13:07","modified_gmt":"2022-11-29T20:13:07","slug":"identifying-a-transfer-case-seal-or-prop-shaft-plug-leak","status":"publish","type":"post","link":"https:\/\/gm-techlink.com\/?p=17057","title":{"rendered":"Identifying a Transfer Case Seal or Prop Shaft Plug Leak"},"content":{"rendered":"<p style=\"font-weight: 400;\">Automatic transmission fluid may be seen under the center of the vehicle on some 2015-2023 Escalade, Colorado, Express, Silverado 1500, Silverado 2500\/3500, Tahoe, Suburban, Canyon, Sierra 1500, Sierra 2500\/3500 and Yukon models equipped with AWD\/4WD (RPO F48). Some models with an 8-speed transmission are not affected.<\/p>\n<p style=\"font-weight: 400;\">If automatic transmission fluid is found under the middle of the vehicle, verify if the red fluid is coming from the transfer case\/transmission rear output seal or the propeller shaft slip yoke welch plug.<\/p>\n<p style=\"font-weight: 400;\">First, check the rear output seal and boot area for a fluid leak. (Fig. 6) If the output seal is leaking, replace the seal.<\/p>\n<p style=\"font-weight: 400;\">\n<p>&nbsp;<\/p>\n<p style=\"font-weight: 400; text-align: center;\"><img fetchpriority=\"high\" decoding=\"async\" class=\"aligncenter size-full wp-image-17046\" src=\"https:\/\/gm-techlink.com\/wp-content\/uploads\/2022\/11\/F06-ATF-seal-1.png\" alt=\"\" width=\"740\" height=\"480\" srcset=\"https:\/\/gm-techlink.com\/wp-content\/uploads\/2022\/11\/F06-ATF-seal-1.png 740w, https:\/\/gm-techlink.com\/wp-content\/uploads\/2022\/11\/F06-ATF-seal-1-300x195.png 300w, https:\/\/gm-techlink.com\/wp-content\/uploads\/2022\/11\/F06-ATF-seal-1-85x55.png 85w, https:\/\/gm-techlink.com\/wp-content\/uploads\/2022\/11\/F06-ATF-seal-1-200x130.png 200w\" sizes=\"(max-width: 740px) 100vw, 740px\" \/><strong>Fig. 6<\/strong><\/p>\n<p style=\"font-weight: 400;\">\n<p>&nbsp;<\/p>\n<p style=\"font-weight: 400;\">If the seal and boot area appears to be dry, check the welch plug area. (Fig. 7) If the plug is leaking, replace the propeller shaft front slip yoke.<\/p>\n<p style=\"font-weight: 400;\">\n<p>&nbsp;<\/p>\n<p style=\"font-weight: 400; text-align: center;\"><img decoding=\"async\" class=\"aligncenter size-full wp-image-17047\" src=\"https:\/\/gm-techlink.com\/wp-content\/uploads\/2022\/11\/F07-ATF-plug-2.png\" alt=\"\" width=\"740\" height=\"480\" srcset=\"https:\/\/gm-techlink.com\/wp-content\/uploads\/2022\/11\/F07-ATF-plug-2.png 740w, https:\/\/gm-techlink.com\/wp-content\/uploads\/2022\/11\/F07-ATF-plug-2-300x195.png 300w, https:\/\/gm-techlink.com\/wp-content\/uploads\/2022\/11\/F07-ATF-plug-2-85x55.png 85w, https:\/\/gm-techlink.com\/wp-content\/uploads\/2022\/11\/F07-ATF-plug-2-200x130.png 200w\" sizes=\"(max-width: 740px) 100vw, 740px\" \/><strong>Fig. 7<\/strong><\/p>\n<p style=\"font-weight: 400;\">\n<p>&nbsp;<\/p>\n<p style=\"font-weight: 400;\">If both the seal\/boot and the welch plug are wet with automatic transmission fluid, making it difficult to identify the source of the leak, dry the area with a soft rag and drive the vehicle a short distance to initiate the leak. Perform the inspections again to determine which component is leaking.<\/p>\n<p style=\"font-weight: 400;\">Refer to Bulletin #22-NA-225 for additional information.<\/p>\n<p style=\"font-weight: 400;\">\n<p style=\"font-weight: 400;\"><em>&#8211; Thanks to Robert Cross<\/em><\/p>\n<p style=\"font-weight: 400;\">\n","protected":false},"excerpt":{"rendered":"<p>Automatic transmission fluid may be seen under the center of the vehicle on some 2015-2023 Escalade, Colorado, Express, Silverado 1500, Silverado 2500\/3500, Tahoe, Suburban, Canyon, Sierra 1500, Sierra 2500\/3500 and [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_exactmetrics_skip_tracking":false,"_exactmetrics_sitenote_active":false,"_exactmetrics_sitenote_note":"","_exactmetrics_sitenote_category":0,"footnotes":""},"categories":[132],"tags":[],"class_list":["post-17057","post","type-post","status-publish","format-standard","hentry","category-2022-november-c"],"_links":{"self":[{"href":"https:\/\/gm-techlink.com\/index.php?rest_route=\/wp\/v2\/posts\/17057","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/gm-techlink.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/gm-techlink.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/gm-techlink.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/gm-techlink.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=17057"}],"version-history":[{"count":1,"href":"https:\/\/gm-techlink.com\/index.php?rest_route=\/wp\/v2\/posts\/17057\/revisions"}],"predecessor-version":[{"id":17058,"href":"https:\/\/gm-techlink.com\/index.php?rest_route=\/wp\/v2\/posts\/17057\/revisions\/17058"}],"wp:attachment":[{"href":"https:\/\/gm-techlink.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=17057"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/gm-techlink.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=17057"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/gm-techlink.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=17057"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}