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#1
08-25-2009, 11:54 PM
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99 taurus speedometer and shifting problems.
I just bought a 99 taurus and while driving the speedometer will drop to zero and the transmission will start having shifting problems. This only happens when the engine has been running for a little bit though. Any help on how to fix this would be greatly appreciated.
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#2
08-26-2009, 06:52 AM
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Re: 99 taurus speedometer and shifting problems.
Welcome to the forum!
It sounds like you have a vehicle speed sensor issue which will impact both the speedometer and the transmission shifting. I don't have a service manual for the 1999 model year, but in 1998 the regular Taurii had a vehicle speed sensor (VSS). The Taurus SHO derived the vehicle speed from one of the ABS wheel speed sensors. -Rod
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#4
08-26-2009, 11:52 AM
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Re: 99 taurus speedometer and shifting problems.
The VSS is typically just a DC electric motor, the faster it spins, the larger the DC voltage it generates. If you can remove the VSS (usually on the upper rear of the transaxle) you could connect a DC voltmeter to the leads and spin the VSS with a drill to make sure it is generating a voltage.
-Rod
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