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VSS Gone

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Old Sep 28, 2005 | 02:22 PM
  #1  
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VSS Gone

Last night I went to take my son to soccer practice which luckily was only a mile away and the ABS light came on as I was pulling out of the drive way. After a few hundred yards I noticed that it didnt change into second very smoothly. I got a bit of a bump like it dropped the clutch. This got me a bit worried but I kept going. Just befrore i got where i was going I noticed that the speedo wasnt moving either.

I will be picking up a new VSS tonight and probably installing this weekend. Is there anything I need to know? Is there any reason to think that this is not the VSS? I am pretty sure my haynes covers the installation...

Its a 99 F250 CC V10 btw. 60k miles.

Thanks

Gareth
 
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Old Sep 28, 2005 | 03:19 PM
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From: colorado
the install is a piece of cake. good chance its the VSS its a common problem on ford trucks. if just the ABS light was on it could be many things but along with the shifting problem and the lose of your speedo i would say a bad VSS is a good bet.
 
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Old Sep 28, 2005 | 03:32 PM
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Sorry, what is a VSS. Thanks.
 
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Old Sep 28, 2005 | 03:33 PM
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From: Milky Way Galaxy
Vehicle Speed Sensor
 
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Old Sep 29, 2005 | 10:43 AM
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It is located in the top of the rear differential, and adds input to several vehicle functions, namely the ones listed in the first post. Speedometer, automatic trans. shifting, and ABS functions. Sometimes only 1 will show up as a problem when the VSS goes bad, or all 3 will show up. It is held in by one bolt, and takes about 10 minutes to change. A very common failure, IIRC, it only costs about 30 bucks.
 
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Old Sep 29, 2005 | 11:53 AM
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One very important thing ! before removing the the sensor.
Clean the entire area of dirt and scalely rust.you don't want any thing to fall into the rear diff.
Also if when you remove it and it is coverd in tiny grayish material,think about a fluid change with recommended friction modifier if you have an ls unit.

Just my 2 cents
Rich
 
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Old Sep 29, 2005 | 04:17 PM
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Thanks for the heads up on the cleaning. Its a good point.

Anyone know that the recommended interval for changing the dif fluid is?

Btw, the new VSS that i picked up was $26.

Gareth
 
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Old Sep 29, 2005 | 07:55 PM
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From: colorado
Originally Posted by reevesg
Thanks for the heads up on the cleaning. Its a good point.

Anyone know that the recommended interval for changing the dif fluid is?

Btw, the new VSS that i picked up was $26.

Gareth
100,000 miles
 
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Old Sep 30, 2005 | 08:08 AM
  #9  
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I put it in last night and it without issue. The old VSS came out covered in it what looked like chunks of metal but turned out just to be metalic 'gunk' that had formed into peaks. I wiped the gunk of making sure that there was not large peices and there was not.

The other tip that i found very useful was to make sure that no debris fell down into the dif. If i had just pulled it out something would definately have gone in there.

Thanks again.

Gareth
 
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Old Sep 30, 2005 | 09:12 AM
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From: Milky Way Galaxy
Gareth- Thanks for the update, but did it solve the issues?
 
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Old Sep 30, 2005 | 09:22 AM
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Yes, good as new... ;-)
 
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Old Sep 30, 2005 | 12:16 PM
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From: Milky Way Galaxy
Thanks Gareth. I'm now that much more educated if something goes wrong.
 
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Old Sep 30, 2005 | 01:15 PM
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It is likely that the vss was just dirty with the metalic gunk. Cleaning is definitely the first thing I'd do.
 

Last edited by ColtM4; Sep 30, 2005 at 01:17 PM.
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Old Sep 30, 2005 | 02:15 PM
  #14  
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How many miles on your truck?
100,000 is recommended for change but I change at 50,000 miles
Glad you got it fixed.
Rich
 
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Old Oct 1, 2005 | 01:00 AM
  #15  
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From: Blaine Wa
Fortyfords,

In light of my problem that you helped me with last week,......

I took that one bolt off, but could not get the VSS out! What is the trick to this?

Thanks!
 
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