{"id":48959,"date":"2020-06-09T13:23:17","date_gmt":"2020-06-09T19:23:17","guid":{"rendered":"https:\/\/www.moderndriveline.com\/resources\/?p=48959"},"modified":"2020-06-09T13:23:17","modified_gmt":"2020-06-09T19:23:17","slug":"48959-2","status":"publish","type":"post","link":"https:\/\/www.moderndriveline.com\/resources\/48959-2\/","title":{"rendered":"TECH GUIDE: Tremec TR 3550"},"content":{"rendered":"<p class=\"intro\"><span style=\"color: #808080;\"><strong>The TR-3550 five-speed overdrive transmission was developed to provide great torque capacity and is ideal for specialty sports cars equipped with high torque engines.<\/strong><\/span><\/p>\n<p><span style=\"color: #808080;\"><strong>The 3550 was both a product and a product line.The product line encompassed the 3550 and TKO models. Each model had two versions,\u00a0 one being a 0.68 overdrive and the other being a 0.8 overdrive.The difference between the two models was in the gear ratios and the input shaft spline count,. as explained below.<\/strong><\/span><strong><span style=\"color: #808080;\">In 2004 the 3550 and TKO were replaced by the\u00a0<\/span><span style=\"color: #3366ff;\"><a style=\"color: #3366ff;\" href=\"https:\/\/www.moderndriveline.com\/resources\/product-category\/transmissions\/5-speed-transmissions\/tko\/\">TKO-500\/600 product line<\/a><\/span>.<\/strong><span style=\"color: #808080;\"><strong>Today the 3550 and TKO are only available as a used or rebuilt unit.<\/strong><\/span><span style=\"color: #808080;\"><strong>Service parts and upgrades are available such as carbon fiber synchro rings and steel forks.<\/strong><\/span><\/p>\n<blockquote><p><figure id=\"attachment_40515\" aria-describedby=\"caption-attachment-40515\" style=\"width: 300px\" class=\"wp-caption alignright\"><img fetchpriority=\"high\" decoding=\"async\" class=\"size-medium wp-image-40515\" src=\"https:\/\/www.moderndriveline.com\/mm5\/graphics\/wp-content\/uploads\/2019\/08\/tr-3550-1-300x172.jpg\" alt=\"\" width=\"300\" height=\"172\" \/><figcaption id=\"caption-attachment-40515\" class=\"wp-caption-text\">4.2.7<\/figcaption><\/figure><b><span style=\"font-family: verdana,arial,geneva,sans-serif;\">Features &amp; Benefits:<\/span><\/b><\/p>\n<ul>\n<li>Five forward speeds with 5th gear overdrive provides extended ratio coverage, lowering engine RPM&#8217;s and improving fuel economy. (Available in .68 or .82 overdrive ratio)<\/li>\n<li>Tapered roller bearings on input, output and counter shafts increase torque capacity.<\/li>\n<li>Massive 83 mm center distance from mainshaft to countershaft allows for the largest most durable gear sizes.<\/li>\n<li>Specially designed aluminum die cast housings provides optimum strength-to-weight ratio.<\/li>\n<li>Steel input shaft retainer enhances durability.<\/li>\n<li>TKO models are offered with upgraded steel on select gearing, delivering maximum torque capacity.<\/li>\n<li>Internal multi-rail shift linkage system provides robust, positive shifting.<\/li>\n<li>Fifth speed synchronizer located on countershaft reduces gear rattle and shift effort.<\/li>\n<li>10 Spline input shaft (3550) or 26 spline (TKO)<\/li>\n<li>Multiple shift lever locations available:\n<ul>\n<li>Rear &#8211; standard on all TR-3550 transmissions &#8211; ideal for Mustang applications<\/li>\n<li>Mid-shift location &#8211; ideal for pick-up truck retrofits<\/li>\n<li>Front-shift location &#8211; allows retrofits of custom-made cars and other Hot-Rod applications<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/blockquote>\n<p>&nbsp;<\/p>\n<table border=\"0\" width=\"548\" cellspacing=\"0\" cellpadding=\"0\">\n<tbody>\n<tr>\n<td colspan=\"3\" width=\"548\">\n<table border=\"0\" width=\"548\" cellspacing=\"1\" cellpadding=\"1\">\n<tbody>\n<tr>\n<td rowspan=\"2\" align=\"center\" bgcolor=\"#cccccc\" width=\"150\"><span class=\"tremecText\"><b>TREMECPart Number<\/b><\/span><\/td>\n<td rowspan=\"2\" align=\"center\" bgcolor=\"#cccccc\" width=\"66\"><span class=\"tremecText\"><b>Weight(lbs)<\/b><\/span><\/td>\n<td rowspan=\"2\" align=\"center\" bgcolor=\"#cccccc\" width=\"70\"><span class=\"tremecText\"><b>Torque Cap.(lbs-ft)<\/b><\/span><\/td>\n<td colspan=\"6\" align=\"center\" valign=\"middle\" bgcolor=\"#cccccc\" width=\"249\"><span class=\"tremecText\"><b>Gear Ratio Chart<\/b><\/span><\/td>\n<\/tr>\n<tr>\n<td align=\"center\" valign=\"middle\" bgcolor=\"#cccccc\" width=\"41\"><span class=\"tremecText\"><b>1st<\/b><\/span><\/td>\n<td align=\"center\" valign=\"middle\" bgcolor=\"#cccccc\" width=\"40\"><span class=\"tremecText\"><b>2nd<\/b><\/span><\/td>\n<td align=\"center\" valign=\"middle\" bgcolor=\"#cccccc\" width=\"41\"><span class=\"tremecText\"><b>3rd<\/b><\/span><\/td>\n<td align=\"center\" valign=\"middle\" bgcolor=\"#cccccc\" width=\"36\"><span class=\"tremecText\"><b>4th<\/b><\/span><\/td>\n<td align=\"center\" valign=\"middle\" bgcolor=\"#cccccc\" width=\"40\"><span class=\"tremecText\"><b>5th<\/b><\/span><\/td>\n<td align=\"center\" valign=\"middle\" bgcolor=\"#cccccc\" width=\"36\"><span class=\"tremecText\"><b>Rev<\/b><\/span><\/td>\n<\/tr>\n<tr>\n<td align=\"center\" bgcolor=\"#ffffcc\" width=\"150\"><span class=\"tremecText\">Standard (260 0682R)<\/span><\/td>\n<td align=\"center\" bgcolor=\"#ffffcc\" width=\"66\"><span class=\"tremecText\">100<\/span><\/td>\n<td align=\"center\" bgcolor=\"#ffffcc\" width=\"70\"><span class=\"tremecText\">350<\/span><\/td>\n<td align=\"center\" bgcolor=\"#ffffcc\" width=\"41\"><span class=\"tremecText\">3.27<\/span><\/td>\n<td align=\"center\" bgcolor=\"#ffffcc\" width=\"40\"><span class=\"tremecText\">1.98<\/span><\/td>\n<td align=\"center\" bgcolor=\"#ffffcc\" width=\"41\"><span class=\"tremecText\">1.34<\/span><\/td>\n<td align=\"center\" bgcolor=\"#ffffcc\" width=\"36\"><span class=\"tremecText\">1.00<\/span><\/td>\n<td align=\"center\" bgcolor=\"#ffffcc\" width=\"40\"><span class=\"tremecText\">0.68<\/span><\/td>\n<td align=\"center\" bgcolor=\"#ffffcc\" width=\"36\"><span class=\"tremecText\">3.00<\/span><\/td>\n<\/tr>\n<tr>\n<td align=\"center\" bgcolor=\"#cccccc\" width=\"150\"><span class=\"tremecText\">Standard II (TCET1376)<\/span><\/td>\n<td align=\"center\" bgcolor=\"#cccccc\" width=\"66\"><span class=\"tremecText\">100<\/span><\/td>\n<td align=\"center\" bgcolor=\"#cccccc\" width=\"70\"><span class=\"tremecText\">375<\/span><\/td>\n<td align=\"center\" bgcolor=\"#cccccc\" width=\"41\"><span class=\"tremecText\">3.27<\/span><\/td>\n<td align=\"center\" bgcolor=\"#cccccc\" width=\"40\"><span class=\"tremecText\">1.98<\/span><\/td>\n<td align=\"center\" bgcolor=\"#cccccc\" width=\"41\"><span class=\"tremecText\">1.34<\/span><\/td>\n<td align=\"center\" bgcolor=\"#cccccc\" width=\"36\"><span class=\"tremecText\">1.00<\/span><\/td>\n<td align=\"center\" bgcolor=\"#cccccc\" width=\"40\"><span class=\"tremecText\">0.82<\/span><\/td>\n<td align=\"center\" bgcolor=\"#cccccc\" width=\"36\"><span class=\"tremecText\">3.00<\/span><\/td>\n<\/tr>\n<tr>\n<td align=\"center\" bgcolor=\"#ffffcc\" width=\"150\"><span class=\"tremecText\">TKO (260 0708)<\/span><\/td>\n<td align=\"center\" bgcolor=\"#ffffcc\" width=\"66\"><span class=\"tremecText\">100<\/span><\/td>\n<td align=\"center\" bgcolor=\"#ffffcc\" width=\"70\"><span class=\"tremecText\">425<\/span><\/td>\n<td align=\"center\" bgcolor=\"#ffffcc\" width=\"41\"><span class=\"tremecText\">3.27<\/span><\/td>\n<td align=\"center\" bgcolor=\"#ffffcc\" width=\"40\"><span class=\"tremecText\">1.98<\/span><\/td>\n<td align=\"center\" bgcolor=\"#ffffcc\" width=\"41\"><span class=\"tremecText\">1.34<\/span><\/td>\n<td align=\"center\" bgcolor=\"#ffffcc\" width=\"36\"><span class=\"tremecText\">1.00<\/span><\/td>\n<td align=\"center\" bgcolor=\"#ffffcc\" width=\"40\"><span class=\"tremecText\">0.68<\/span><\/td>\n<td align=\"center\" bgcolor=\"#ffffcc\" width=\"36\"><span class=\"tremecText\">3.00<\/span><\/td>\n<\/tr>\n<tr>\n<td align=\"center\" bgcolor=\"#cccccc\" width=\"150\"><span class=\"tremecText\">TKO II (TCET1377)<\/span><\/td>\n<td align=\"center\" bgcolor=\"#cccccc\" width=\"66\"><span class=\"tremecText\">100<\/span><\/td>\n<td align=\"center\" bgcolor=\"#cccccc\" width=\"70\"><span class=\"tremecText\">475<\/span><\/td>\n<td align=\"center\" bgcolor=\"#cccccc\" width=\"41\"><span class=\"tremecText\">3.27<\/span><\/td>\n<td align=\"center\" bgcolor=\"#cccccc\" width=\"40\"><span class=\"tremecText\">1.98<\/span><\/td>\n<td align=\"center\" bgcolor=\"#cccccc\" width=\"41\"><span class=\"tremecText\">1.34<\/span><\/td>\n<td align=\"center\" bgcolor=\"#cccccc\" width=\"36\"><span class=\"tremecText\">1.00<\/span><\/td>\n<td align=\"center\" bgcolor=\"#cccccc\" width=\"40\"><span class=\"tremecText\">0.82<\/span><\/td>\n<td align=\"center\" bgcolor=\"#cccccc\" width=\"36\"><span class=\"tremecText\">3.00<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<a href=\"https:\/\/www.moderndriveline.com\/mm5\/graphics\/wp-content\/uploads\/2019\/10\/TR3550-TKO-Service-Manual.pdf\" class=\"pdfemb-viewer\" style=\"\" data-width=\"max\" data-height=\"max\" data-toolbar=\"bottom\" data-toolbar-fixed=\"off\">TR3550 -TKO Service Manual<\/a>\n","protected":false},"excerpt":{"rendered":"<p>A page listing some specification info. &#038; features of the Tremec TR 3550 transmission<\/p>\n","protected":false},"author":17,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[19,51],"tags":[],"class_list":["post-48959","post","type-post","status-publish","format-standard","hentry","category-tech-info","category-transmissions-videos"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.moderndriveline.com\/resources\/wp-json\/wp\/v2\/posts\/48959","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.moderndriveline.com\/resources\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.moderndriveline.com\/resources\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.moderndriveline.com\/resources\/wp-json\/wp\/v2\/users\/17"}],"replies":[{"embeddable":true,"href":"https:\/\/www.moderndriveline.com\/resources\/wp-json\/wp\/v2\/comments?post=48959"}],"version-history":[{"count":0,"href":"https:\/\/www.moderndriveline.com\/resources\/wp-json\/wp\/v2\/posts\/48959\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.moderndriveline.com\/resources\/wp-json\/wp\/v2\/media?parent=48959"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.moderndriveline.com\/resources\/wp-json\/wp\/v2\/categories?post=48959"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.moderndriveline.com\/resources\/wp-json\/wp\/v2\/tags?post=48959"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}