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speedo acting strange then gear hunting

 
  #1  
Old 08-06-2017, 11:42 AM
DCGuillory
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speedo acting strange then gear hunting

Cant find anything on this with search.

After about 25 mins of driving the speedo starts bouncing around a little for about 10 mins. Then the speedo stops working all together and the transmission starts hunting for gears but I still have power. I dont have a way to pull codes atm. I will get them asap. I assume this is a sensor issue. Anyone know where I should look for something partially hanging off my rig or corroded or something?

All fluids are recently changed and I did check that they are full.
Basic current and ground checks out okay.
I turned the tuner off before I started driving to see if that would help, no dice.

2000 E350 7.3 425,XXX miles
 
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Old 08-06-2017, 05:06 PM
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EagleFreek
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The speed sensor is located on the rear axle. It is probably in need of a new one or there is probably metal shavings in your rear axle messing it up. I would start with changing your rear axle fluid and removing your old sensor and cleaning it. There is also a tone ring in the differential that can go bad.
 
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Old 08-06-2017, 06:06 PM
DCGuillory
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Thanks Rick. Sounds like basic good advice. I will do both.
 
 
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