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Post by russiankid on May 6, 2015 9:20:56 GMT -5
I was messing with the AC yesterday in my driveway and while in the car monitoring the vent temps, the speedo jumped up to 15mph and back to zero. The rig was in park, what in the world?
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Post by bdmontero on May 6, 2015 23:57:03 GMT -5
Its Obamas fault.;D
Sent from my SM-N900V using proboards
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Post by russiankid on May 7, 2015 9:27:30 GMT -5
That was my first guess as well haha
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Post by ES_97Sport on May 7, 2015 20:34:29 GMT -5
I was messing with the AC yesterday in my driveway and while in the car monitoring the vent temps, the speedo jumped up to 15mph and back to zero. The rig was in park, what in the world? If he wasn't directly, I'm sure he was involved.  My guess is it was a hic-cup in the electrical or the PCM. I've never had that happen. Hopefully its not indicative of anything. The VSS is magnetic and mechanical. Mmmm. Edward |
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Post by russiankid on May 8, 2015 14:49:52 GMT -5
I was messing with the AC yesterday in my driveway and while in the car monitoring the vent temps, the speedo jumped up to 15mph and back to zero. The rig was in park, what in the world? If he wasn't directly, I'm sure he was involved. My guess is it was a hic-cup in the electrical or the PCM. I've never had that happen. Hopefully its not indicative of anything. The VSS is magnetic and mechanical. Mmmm. Edward Haha probably. Should have provided some background info. I have had this happen before but while in motion, it was shifting into 4th and the speedo jumped up and back down. The VSS has been replaced and that didn't change anything aside from the trans being more responsive to downshifting. |
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Post by ES_97Sport on May 19, 2015 19:01:51 GMT -5
... Should have provided some background info. I have had this happen before but while in motion, it was shifting into 4th and the speedo jumped up and back down. The VSS has been replaced and that didn't change anything aside from the trans being more responsive to downshifting. Probably a stupid question, but is everything tight? That sounds like an issue caused by the 'jump' in the trans when a shift occurs - which makes me think there might also be a short developing. I'd check the plug and make sure that's solid on the VSS and check the wiring harness. Speedo on mine just quit about 7-8 miles from Green River last month. No jump, nothing. Just quit. Turned out to be one of the two electrical plugs for the VSS. Unplugged both, plugged them back together and everything was fine. Edward |
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Post by r0llinlacs on Jul 15, 2015 22:25:27 GMT -5
... Should have provided some background info. I have had this happen before but while in motion, it was shifting into 4th and the speedo jumped up and back down. The VSS has been replaced and that didn't change anything aside from the trans being more responsive to downshifting. Probably a stupid question, but is everything tight? That sounds like an issue caused by the 'jump' in the trans when a shift occurs - which makes me think there might also be a short developing. I'd check the plug and make sure that's solid on the VSS and check the wiring harness. Speedo on mine just quit about 7-8 miles from Green River last month. No jump, nothing. Just quit. Turned out to be one of the two electrical plugs for the VSS. Unplugged both, plugged them back together and everything was fine. Edward Two plugs for the VSS? |
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Post by ES_97Sport on Jul 16, 2015 13:54:16 GMT -5
... Turned out to be one of the two electrical plugs for the VSS. Unplugged both, plugged them back together and everything was fine. Edward Two plugs for the VSS?   Sorry!!! Should have been clearer. The big Sport has a different setup than stock. Dakota Digital speedo converter/calibrator with the NP231 Jeep t-cases and Terra's ultra-short output shaft converter that uses the completely electronic VSS. So, I have two plugs - one to the Dakota and one to the VSS. Stock Sports only have the one plug that goes directly to the VSS on the output shaft. Edward |
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Sorry!!! Should have been clearer. The big Sport has a different setup than stock. Dakota Digital speedo converter/calibrator with the NP231 Jeep t-cases and Terra's ultra-short output shaft converter that uses the completely electronic VSS. So, I have two plugs - one to the Dakota and one to the VSS.