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  #11  
Old 05-26-2013, 11:59 AM
20/20 20/20 is offline
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Would it be a chevy 350 or would it be under isuzu npr. I realize the engine would be the same but???????????????? I have the chevy but when I need parts I look up isuzu npr, much easier.
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  #12  
Old 05-27-2013, 07:00 PM
caseysmowing caseysmowing is online now
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Took it to advance but no luck on checking codes. They don't have NPR in their system either. Change the oil and transmission fluid but haven't taken it out yet. I have another place to try and run some codes.
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  #13  
Old 05-28-2013, 07:22 AM
Bashby Bashby is offline
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It is probably the vehicle speed sensor, you could just try replacing it if you have no luck with codes.
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  #14  
Old 05-28-2013, 08:44 AM
caseysmowing caseysmowing is online now
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Have no idea where that is located any help would be great. How much for the speed sensor?
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  #15  
Old 05-28-2013, 07:56 PM
Bashby Bashby is offline
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They are generally located toward the rear of the transmission where they can get a reading from the output shaft, some older stuff used the one in the rear end. If you get one to look at It may be easy to find. They may even call it an output speed sensor. It may be a dealer item only.
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  #16  
Old 06-13-2013, 03:25 AM
caseysmowing caseysmowing is online now
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Took it out yesterday and it ran fine. The speedometer did act up just a little. It never moved more than 5mph faster than what I was going. When it happened before it was like 20mph. Sound like a speed sensor?
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  #17  
Old 07-25-2013, 10:53 AM
caseysmowing caseysmowing is online now
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Ordered the sensors. There is a input and output sensor. I just ordered both and putting them in this weekend. If this fixes it on to the ramps. Can't get anything done this summer with all the rain and extra work.
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  #18  
Old 07-28-2013, 04:39 PM
caseysmowing caseysmowing is online now
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Sensors didn't work! Seems like when you get on it when it's in 3rd & 4th is the only time it does it. Never did it when I test drove it. But a 100 miles in to me owning it it starts. Any other suggestions?
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  #19  
Old 07-28-2013, 05:45 PM
DaveOhio DaveOhio is offline
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It sounds to me like it may be time to establish a relationship with a truck mechanic. An auto zone isn't going to help with a commercial truck.

Hopefully they can diagnose w/o a teardown. Good luck with it.
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  #20  
Old 07-28-2013, 06:26 PM
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123hotdog 123hotdog is offline
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I have a similar truck

Casey, I have an older truck. A 1993. I struggled for two years looking for somebody to work on it. I wasted a ton of money on idiots. I would call Don @ Team Tire in Waynesboro. I would ask him if he knows somebody that specializes in box trucks and cab overs. I hope this is the only trouble you have with it, but if not you really need somebody that works on these trucks specifically. I would ask around at the truck stop between Staunton and Lexington. We have a free service tire store franchise here which is like a regular tire store but they have a truck center that only works on one ton and larger trucks. They usually fix mine in one day. No down time. I love it. Best of luck.
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