mackey58 Posted July 12, 2016 Share Posted July 12, 2016 Speedo and odometer quip today nack has a rebuilt kit do you guys think it's the sensor on the back if the trans .ordered the rebuilt kit should order a cable too Quote Link to comment https://www.bigmacktrucks.com/topic/46002-speedo-quit-in-the-90-rd-690/ Share on other sites More sharing options...
theakerstwo Posted July 12, 2016 Share Posted July 12, 2016 Disconnect the tack and speedo and connect the tack cable to the speedo and start the engine.If the speedohead is good it will work somewhat like the tackometer.To check the sensor you need to ohm it out and that sensor should have 900 to 1400 ohms if good. Quote glenn akers Link to comment https://www.bigmacktrucks.com/topic/46002-speedo-quit-in-the-90-rd-690/#findComment-339087 Share on other sites More sharing options...
mackey58 Posted July 12, 2016 Author Share Posted July 12, 2016 Thought that stuff was mechanical not electronic why would you need to ck the ohms Quote Link to comment https://www.bigmacktrucks.com/topic/46002-speedo-quit-in-the-90-rd-690/#findComment-339117 Share on other sites More sharing options...
theakerstwo Posted July 12, 2016 Share Posted July 12, 2016 You re read your post and your talking about a sensor.So does it have a cable drive or sensor? If you dont know disregard my statement. Quote glenn akers Link to comment https://www.bigmacktrucks.com/topic/46002-speedo-quit-in-the-90-rd-690/#findComment-339120 Share on other sites More sharing options...
mackey58 Posted July 12, 2016 Author Share Posted July 12, 2016 Yea it's a cable drive sorry. Mack says you can rebuilt it that sound right Quote Link to comment https://www.bigmacktrucks.com/topic/46002-speedo-quit-in-the-90-rd-690/#findComment-339128 Share on other sites More sharing options...
theakerstwo Posted July 12, 2016 Share Posted July 12, 2016 The cable its self can be repaired.Inside of the trans is a drive gear that can go bad so you can remove it and check it.Also mack sure the the head is free and will turn. Quote glenn akers Link to comment https://www.bigmacktrucks.com/topic/46002-speedo-quit-in-the-90-rd-690/#findComment-339133 Share on other sites More sharing options...
41chevy Posted July 12, 2016 Share Posted July 12, 2016 If you do only have to replace the inner cable don't forget to lube it. Paul Quote "OPERTUNITY IS MISSED BY MOST PEOPLE BECAUSE IT IS DRESSED IN OVERALLS AND LOOKS LIKE WORK" Thomas Edison “Life’s journey is not to arrive at the grave safely, in a well preserved body, but rather to skid in sideways, totally worn out, shouting ‘Holy shit, what a ride!’” P.T.CHESHIRE Link to comment https://www.bigmacktrucks.com/topic/46002-speedo-quit-in-the-90-rd-690/#findComment-339134 Share on other sites More sharing options...
mackey58 Posted July 12, 2016 Author Share Posted July 12, 2016 Ok guys thanks I ll tell the boss see if they fix it Quote Link to comment https://www.bigmacktrucks.com/topic/46002-speedo-quit-in-the-90-rd-690/#findComment-339152 Share on other sites More sharing options...
mackey58 Posted July 12, 2016 Author Share Posted July 12, 2016 We put a new cable and rebuilt the drive the speedo was stuck got it freed up seems to be working ok have to ask johnny law when I see him lol Quote Link to comment https://www.bigmacktrucks.com/topic/46002-speedo-quit-in-the-90-rd-690/#findComment-339157 Share on other sites More sharing options...
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