I have a 1994 Jeep Grand Cherokee Laredo 4×4 4.0L 6cyl with 169+k miles. Automatic transmission failure in Nov. 2020. Repaired. Failed again within the hour out of shop. Replaced with comparative milage, tested used tranny December 2020. Minimal in-town driving since due to disability. Open highway distance driving yesterday. Failed again within an hour. <\/p>\n\n\n\n
Symptoms always the same: sensing minor shift delays after vehicle warms up to 200\u00b0 range, high RPMs on open highway, vehicle refuses to move once stopped for traffic signs\/lights, requires shutting down engine to cool off before tranny will re-engage to ‘limp’ a short distance before failing again. Works fine after vehicle fully cooled. Tranny fluid checks full & clean. Thermostat changed in Dec. No evidence of built-in radiator\/tranny oil coolant leakage. I suspect either a tranny electrical problem or failure of the built-in tranny oil cooler. Considering having external mounted tranny oil cooler with fan installed because this consistently seems to be a heat-induced problem. IDK if it matters, but the part-time 4WD is only rarely engaged, works fine when used & has not been tested during any failure. Your thoughts please?<\/p>\n\n\n\n
The first thing I would is look at the transmission fluid color. If the color is fresh and clean without a burnt smell I would lean toward an electrical cause over mechanical. Transmission Temperature<\/a> can cause some serious damage. <\/p>\n","protected":false},"excerpt":{"rendered":" I have a 1994 Jeep Grand Cherokee Laredo 4×4 4.0L 6cyl with 169+k miles. Automatic transmission failure in Nov. 2020. Repaired. Failed again within the hour out of shop. Replaced with comparative milage, tested used tranny December 2020. Minimal in-town driving since due to disability. Open highway distance driving yesterday. Failed again within an hour.… Read More »Transmission shift delays after warm<\/span><\/a><\/p>\n","protected":false},"author":16824,"featured_media":34600,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"neve_meta_sidebar":"","neve_meta_container":"","neve_meta_enable_content_width":"","neve_meta_content_width":0,"neve_meta_title_alignment":"","neve_meta_author_avatar":"","neve_post_elements_order":"","neve_meta_disable_header":"","neve_meta_disable_footer":"","neve_meta_disable_title":"","footnotes":""},"categories":[1,34],"tags":[],"class_list":["post-77360","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-auto-repair-questions","category-jeep"],"_links":{"self":[{"href":"https:\/\/www.freeautomechanic.com\/mechanic\/forum\/wp-json\/wp\/v2\/posts\/77360","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.freeautomechanic.com\/mechanic\/forum\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.freeautomechanic.com\/mechanic\/forum\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.freeautomechanic.com\/mechanic\/forum\/wp-json\/wp\/v2\/users\/16824"}],"replies":[{"embeddable":true,"href":"https:\/\/www.freeautomechanic.com\/mechanic\/forum\/wp-json\/wp\/v2\/comments?post=77360"}],"version-history":[{"count":0,"href":"https:\/\/www.freeautomechanic.com\/mechanic\/forum\/wp-json\/wp\/v2\/posts\/77360\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.freeautomechanic.com\/mechanic\/forum\/wp-json\/wp\/v2\/media\/34600"}],"wp:attachment":[{"href":"https:\/\/www.freeautomechanic.com\/mechanic\/forum\/wp-json\/wp\/v2\/media?parent=77360"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.freeautomechanic.com\/mechanic\/forum\/wp-json\/wp\/v2\/categories?post=77360"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.freeautomechanic.com\/mechanic\/forum\/wp-json\/wp\/v2\/tags?post=77360"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}