leweymeister Posted September 29, 2010 Share Posted September 29, 2010 I have a 96 Mack CH613 with a E7-427. From time to time, the speedo will all-of-a-sudden start reading exactly half the speed I'm going. It did it for a couple weeks, and then the problem went away for the most part, but occasionally it will just drop down to half-speed. There seems to be no rhyme nor reason to it. Any suggestions? Quote Link to comment Share on other sites More sharing options...
JerryB Posted September 29, 2010 Share Posted September 29, 2010 I have a 96 Mack CH613 with a E7-427. From time to time, the speedo will all-of-a-sudden start reading exactly half the speed I'm going. It did it for a couple weeks, and then the problem went away for the most part, but occasionally it will just drop down to half-speed. There seems to be no rhyme nor reason to it. Any suggestions?When ours does that the speedo sensor needs to be cleaned then it's good to go for another couple of years. Quote Link to comment Share on other sites More sharing options...
cgallamore Posted October 2, 2010 Share Posted October 2, 2010 i had a 96 ch 9spd fuller trans, had the same prob intermitten for several months, finally found yoke loose,all i did was tighten it and every thing was fine. Quote http://www.bigmacktrucks.com/uploads/1272400769/gallery_4852_794_314995.jpg Link to comment Share on other sites More sharing options...
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