{"id":31531,"date":"2016-05-02T10:30:30","date_gmt":"2016-05-02T15:30:30","guid":{"rendered":"http:\/\/www.freeautomechanic.com\/mechanic\/forum\/?p=31531"},"modified":"2016-05-02T10:30:30","modified_gmt":"2016-05-02T15:30:30","slug":"tachometer-1993-ford-f-superduty","status":"publish","type":"post","link":"https:\/\/www.freeautomechanic.com\/mechanic\/forum\/2016\/05\/tachometer-1993-ford-f-superduty","title":{"rendered":"Tachometer 1993 ford f-superduty"},"content":{"rendered":"<p><a href=\"\/\/www.freeautomechanic.com\/mechanic\/forum\/wp-content\/uploads\/2016\/01\/1993-ford-f-superduty.jpg\" rel=\"attachment wp-att-33515\"><img decoding=\"async\" class=\"aligncenter size-full wp-image-33515\" src=\"\/\/www.freeautomechanic.com\/mechanic\/forum\/wp-content\/uploads\/2016\/01\/1993-ford-f-superduty.jpg\" alt=\"1993 Ford F-Superduty\" width=\"600\" height=\"301\" srcset=\"https:\/\/www.freeautomechanic.com\/mechanic\/forum\/wp-content\/uploads\/2016\/01\/1993-ford-f-superduty.jpg 600w, https:\/\/www.freeautomechanic.com\/mechanic\/forum\/wp-content\/uploads\/2016\/01\/1993-ford-f-superduty-300x151.jpg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/a>I have a 1993 ford f-superduty 7.3l diesel and my tachometer don&#8217;t work. It&#8217;s an EO4D trans, and it don&#8217;t shift unless I do it manually?<\/p>\n<hr \/>\n<p>RESPONSE<\/p>\n<p>I don&#8217;t know that the tachometer not working has anything to do with the <a href=\"\/\/www.freeautomechanic.com\/transmission-troubleshooting.html\">transmission<\/a> shifting issue but I added the wiring diagram for investigating. However the speedometer, odometer and transmission are directly affected by the <a href=\"\/\/www.freeautomechanic.com\/vss-vehicle-speed-sensor.html\">VSS &#8211; Vehicle Speed Sensor<\/a>. This is what I would look at first. Remove it from side of the transmission. Look at the end of it for metal fragments sticking to the magnet. Remove them and re-install or replace.<\/p>\n<h2>Tachometer Wiring Diagram<\/h2>\n<p><img decoding=\"async\" class=\"aligncenter wp-image-33513 size-large\" src=\"\/\/www.freeautomechanic.com\/mechanic\/forum\/wp-content\/uploads\/2016\/01\/1993-ford-f-superduty-tachometer-1024x437.jpg\" alt=\"1993 Ford F-Superduty Tachometer wiring diagram\" width=\"695\" height=\"297\" srcset=\"https:\/\/www.freeautomechanic.com\/mechanic\/forum\/wp-content\/uploads\/2016\/01\/1993-ford-f-superduty-tachometer-1024x437.jpg 1024w, https:\/\/www.freeautomechanic.com\/mechanic\/forum\/wp-content\/uploads\/2016\/01\/1993-ford-f-superduty-tachometer-300x128.jpg 300w, https:\/\/www.freeautomechanic.com\/mechanic\/forum\/wp-content\/uploads\/2016\/01\/1993-ford-f-superduty-tachometer-768x328.jpg 768w, https:\/\/www.freeautomechanic.com\/mechanic\/forum\/wp-content\/uploads\/2016\/01\/1993-ford-f-superduty-tachometer.jpg 1266w\" sizes=\"(max-width: 695px) 100vw, 695px\" \/><\/p>\n<h3>E4OD Transmission Operation<\/h3>\n<p>Input signals form sensors are sent to the <a href=\"\/\/www.freeautomechanic.com\/pcm-engine-computer.html\">powertrain control module (PCM)<\/a>. The PCM can determine when the time and conditions are right for a shift or converter clutch application. The PCM can also determine line pressure needed to optimize the shift feel.<\/p>\n<ul>\n<li><a href=\"\/\/www.freeautomechanic.com\/diagnostictroblecodes7.html\"><strong>How to check Ford engine codes without a scan tool<\/strong> <\/a><\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>I have a 1993 ford f-superduty 7.3l diesel and my tachometer don&#8217;t work. It&#8217;s an EO4D trans, and it don&#8217;t shift unless I do it manually? RESPONSE I don&#8217;t know that the tachometer not working has anything to do with the transmission shifting issue but I added the wiring diagram for investigating. However the speedometer,&hellip;&nbsp;<a href=\"https:\/\/www.freeautomechanic.com\/mechanic\/forum\/2016\/05\/tachometer-1993-ford-f-superduty\" rel=\"bookmark\">Read More &raquo;<span class=\"screen-reader-text\">Tachometer 1993 ford f-superduty<\/span><\/a><\/p>\n","protected":false},"author":12672,"featured_media":0,"comment_status":"open","ping_status":"closed","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":[1,5],"tags":[10578,10579,10580],"class_list":["post-31531","post","type-post","status-publish","format-standard","hentry","category-auto-repair-questions","category-ford","tag-f-superduty","tag-tachometer","tag-tachometer-wiring-diagram"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v23.0 (Yoast SEO v27.6) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Tachometer 1993 ford f-superduty - FreeAutoMechanic Advice<\/title>\n<meta name=\"description\" content=\"the tachometer not working has anything to do with the transmission shifting issue but I added the wiring diagram for investigating. 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