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ABS / Speedo??

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Old Aug 18, 2008 | 02:42 PM
  #1  
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From: Lapeer, Michigan
ABS / Speedo??

Hello all,

Hope you can help or direct me in the right direction.

Here's my truck:
1999 F-250 super duty, extended cab, 4WD, automatic, 5.4 gasoline engine with 117,000 miles and a small crack in the lower portion of the windsheild.

Here's what's happening:

Crusing down the e-way about a week ago, My ABS light comes on and then the speedo starts jumping +/- 30 mph or so. Turn the truck off and it seems to reset its self. Start crusing again, same thing happens. The truck sat for a week. Drove it around town, no problem. Hit the e-way again.........ABS light pops on, speedo starts jumping around again. When the speedo jumps it'll shut of the cruise control, but the tach is steady as can be. It doesn't jump or twitch. When I got off the e-way and was driving around 35 - 40 mph, the speedo was still jumping around.

Turn the truck off, No ABS light. No speedo jump.......................for a while and then "poof"...ABS light on, speedo jumping?

I read about the VSS but I'm not sure that's my problem.
Does the ABS sensor and speedo sensor have anything in common??

Doesn't make sense to me.

Any help would be appreciated.

Thanks,
SteveO.
 
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Old Aug 18, 2008 | 04:53 PM
  #2  
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That is indeed the VSS on top of the rear diff. It's a fairly common problem and your description describes it to a tee.
 
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Old Aug 18, 2008 | 05:04 PM
  #3  
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high ho silver
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Originally Posted by Monsta
That is indeed the VSS on top of the rear diff. It's a fairly common problem and your description describes it to a tee.
Ditto, and pretty inexpensive and easy to replace.
 
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Old Aug 18, 2008 | 06:56 PM
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The VSS and rear ABS sensor are the same sensor. hence why when one fails the other system does too.
 
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Old Aug 19, 2008 | 08:56 AM
  #5  
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From: Lapeer, Michigan
Thanks!

Thanks Guys! (and/or gals!)

I'll get it replaced this weekend. I'm assuming I can pick this up at my local parts store correct? Do I ask them for a VSS sensor or ABS sensor or a VSS/ABS sensor or just take the old one in and say "give me one of these"?
 
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Old Aug 19, 2008 | 12:16 PM
  #6  
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cartmanea
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Its probably that small crack in the windshield causing problems
 
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Old Aug 19, 2008 | 05:02 PM
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VSS should get you the right part.
 
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Old Aug 26, 2008 | 10:05 AM
  #8  
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SteveO.
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From: Lapeer, Michigan
Just wanted throw a "Thank you" out to you guys.
It was a cheap, easy fix. And that doesn't happen too often at all.

It was cheaper then fixing the crack in the windshield!!

Thanks again for the info.
 
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