speedometer problems

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  #1  
Old 02-12-2007, 10:00 AM
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Default speedometer problems

just recently my speedo was spiking and then it stopped working...

my trip meter and mileage had also stopped working also....

what could be problem???
 
  #2  
Old 02-12-2007, 10:16 AM
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Default Re: speedometer problems

Originally Posted by KAIMIKAZEE
just recently my speedo was spiking and then it stopped working...

my trip meter and mileage had also stopped working also....

what could be problem???
vehicle speed sensor
 
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  #3  
Old 02-12-2007, 10:19 AM
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yes i was kind of leaning toward that....

i heard it was behind the tranny where the drive shaft connects..

but what does it look like????
 
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Old 02-12-2007, 10:35 AM
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Originally Posted by KAIMIKAZEE
yes i was kind of leaning toward that....

i heard it was behind the tranny where the drive shaft connects..

but what does it look like????
2 to 4 wires come from over top (or side) of transmission... it is either threaded in and locked with a jam nut, or bolted with a retainer. it is at the rear of the transmission at the output shaft
 
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  #5  
Old 02-12-2007, 11:02 AM
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It threads in AND has a locknut, and a plug with the wires, you can change it out in 15 minutes.

Just ask the parts guy how many turns to back it out after it bottoms out, I can't remember, BUT I think its one turn.

Last time I changed mine it was around $30.
 
  #6  
Old 02-12-2007, 11:20 AM
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quote="Maniac"]It threads in AND has a locknut,

it has a jam nut, as i stated above.

locknuts have distorted threads or nylon rings that stop a fastener from backing off completely after becoming loose


and a plug with the wires, you can change it out in 15 minutes.

Just ask the parts guy how many turns to back it out after it bottoms out, I can't remember, BUT I think its one turn.

Last time I changed mine it was around $30.[/quote]

bottom it out, then back off a 1/2 turn
 
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  #7  
Old 02-12-2007, 01:11 PM
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cool thanks guys, i just found where the sensor is...

will be digging it out tomorrow....

yeah peterbilt quoted me $43 for the sensor...
 
  #8  
Old 02-13-2007, 01:16 AM
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are there usually 2 (or more) speed sensors?
is this speed sensor the same as the one used for other sub systems?
 
  #9  
Old 02-13-2007, 04:15 AM
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quote="possum squat"]are there usually 2 (or more) speed sensors?

no... ...depending

is this speed sensor the same as the one used for other sub systems?[/quote]

it's a magnetic pulse generator..., if that's what you mean.

abs sensors as well as some engine speed sensors are the same type of sensor
 
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  #10  
Old 02-13-2007, 06:17 AM
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well finally pulled it out...

the tip had some fresh oil on it...

i only drove it for like a half mile than i parked....

speedo works...

couldn't really go far because of the weather....

hope that oil on tip isn't an issue?????
 

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