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What is a speed sensor?

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Old 07-21-2003, 01:25 PM
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What is a speed sensor?
A guy at a transmission shop today told me I need a new speed sensor. What is it and what does it do?

(I have a feeling the answer is pretty self-explanatory, but I've never heard of one) :-)
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Old 07-21-2003, 01:29 PM
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uh it mounts to the tailshaft housing and sends ansignal to pcm to let the pcm know how fast you are going
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Old 07-21-2003, 01:40 PM
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VSS - vehicle speed sensor.... sends pulses to the PCM based on speed of the tranny tailshaft. See pic for location of VSS on a T56.
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Old 07-21-2003, 01:45 PM
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What problems would I have if this sensor goes bad?
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Old 07-21-2003, 01:48 PM
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tranny have weird shift points speedo might not work engine performance degraded
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Old 07-21-2003, 01:52 PM
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Thanks for the info. That's exactly how my car feels right now. It's not a major problem, just feels kind of funny.

Hopefully the new sensor will clear that right up!!!!!
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Old 07-21-2003, 03:18 PM
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One more thing. If my speed sensor is bad, would my speedometer still work?
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Old 07-21-2003, 03:21 PM
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depends maybe not there are some other things that affect tranny shifting also tps, maf, map, ignition components
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Old 07-24-2003, 12:38 PM
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Well, I got the new speed sensor put on today. Runs great now. I guess the new tranny and torque converter caused the sensor to go.
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Old 07-24-2003, 12:39 PM
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good deal bro
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