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94 F150 Shifts hard and no speedo


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jsa7532
Novice

Nov 15, 2009, 8:00 AM

Post #1 of 2 (1862 views)
94 F150 Shifts hard and no speedo Sign In

   
1994 Ford
F150
5.0
Auto
145,000 miles

This problem started without warning. I used the truck earlier that day and everything was fine. When I took the truck out again I noticed that its shifting at higher RPM's no matter how light I pressed the gas pedal. When it did shift, it was hard. I thought it would take out a u-joint very quickly. I also the speedometer and odometer does not work either. All of these problems happened at the same time.

Any ideas?


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Nov 15, 2009, 8:40 AM

Post #2 of 2 (1857 views)
Re: 94 F150 Shifts hard and no speedo Sign In

Yes, those problems are one in the same. The transmission uses the speed signal to determine shift points. You likely have a bad VSS (vehicle speed sensor) in the trans.



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94 F150 Shifts hard and no speedo


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