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Old 08-08-2007, 14:42   #1 (permalink)
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Speedo,tranny malfunction

I have a 99 taurus wagon 3.0L vulcan engine 40,000m on rebuild by ford tranny...getting progressively worse is this problem,driving along and everything is fine then the speedometer just quits and at the same time the tranny starts acting up rpm's go up and dosen't want to shift.and speed drops,This only lasts a few seconds or more and then the speedo starts working again and tranny goes back to normal.Asked my dealer about problem and he suggested replacing MLP sensor which i did but I still have the problem. can anyone give me an idea what might be wrong
Thanks Machz54
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Old 08-08-2007, 14:47   #2 (permalink)
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Re: Speedo,tranny malfunction

VSS = Vehicle Speed Sensor.
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Old 08-09-2007, 01:33   #3 (permalink)
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Re: Speedo,tranny malfunction

Thanks.. any idea where it is located
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Old 08-09-2007, 10:21   #4 (permalink)
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Re: Speedo,tranny malfunction

its on the left side of the transaxel, down from the intake manifold. you will have to jack the car up and stick your hand in there. my speed sensor is dead and my car dosent even try to shift into second. im working on mine today.
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Old 08-09-2007, 14:28   #5 (permalink)
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Re: Speedo,tranny malfunction

Thanks just replaced mine and hope it fixes problem
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Old 10-02-2007, 09:47   #6 (permalink)
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confused Re: Speedo,tranny malfunction

I'm trying to replace mine on my 2000 SE wagon, 3.0 OHV U code, and I can't get it off.


Part is MOTORCRAFT SW6012

I got all three bolts off. After I pulled the one off the center I took off the arm that was attached around the center post that is threaded sticking up. I can't get the entire thing off now. It feels like the threaded post in the middle is holding it on. Any tips?
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Old 10-02-2007, 10:19   #7 (permalink)
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Re: Speedo,tranny malfunction

I answered my own question. Pulled very hard and it finally started to budge, got her off. Hopefully this fixes my shifting issues as well. Speedo "falls asleep", car sticks in first, almost redlines, then speedometer bounces back up and car shifts.
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Old 10-02-2007, 12:15   #8 (permalink)
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Re: Speedo,tranny malfunction

That is the TRS transmission range sensor. It will cause a lot of problems but probably isn't what the cause of the speedo issue. The VSS is located on the passenger end of the tranny near the rear motor mount.
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Old 10-02-2007, 18:20   #9 (permalink)
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frown Re: Speedo,tranny malfunction

Ok this has been a nightmare. NAPA sold me a small, cylindrical-shaped part with a shaft protruding out one end, a two-wire female wire connection on the side, a bracket with one hole on it in the middle, and on the very end a cut-out with a pin in it. I took it back because I could not locate it plus the O'Reilly's part was one that I had seen before.

I asked him three times to verify my 3.0L auto, U-code, non flex-fuel, OHV engine and that it was the Vehicle Speed Sensor. He said yes and I went ahead and put that part on. Well evidently it wasn't the problem because the speedometer flickered again after replacing.

Do I have to get to the VSS from the underside of the car? I looked and looked when I had the NAPA part and didn't see a thing like it from up top. Thanks for reading my post.
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Old 10-02-2007, 23:45   #10 (permalink)
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Re: Speedo,tranny malfunction

Here is where the VSS is located on the AX4N. This is a SHO tranny and does not have a VSS but you can see the block off plate.

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