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Old 11-12-2012, 11:50 AM   #1 (permalink)
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Default Speed sensor and metal shavings 99 24 valve OHC

My 99 Taurus with 24 valve overhead cam was acting strange with the trany not shifting, speedometer failing, stumbling into gear at start and warning light for O/D OFF came on and off, one time it got stuck in a low gear. turning car on and off seemed to be a quick fix.
I bought a speed sensor from the junk yard and switched them. The one I took out had metal shavings on it. It is magnetic right?

All was working fine for 2000 miles or so, just saw the O/D OFF warning light and it stumbled at start a couple of times now.

Metal shavings cant be good.
Think the trany is ready to let go?
Is there any preventive action I could do?
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Old 11-12-2012, 12:15 PM   #2 (permalink)
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Replace the fluid in the pan and the filter. Don't 'flush' it, just drain the pan, clean the magnet inside.
Then... wait.
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Old 11-12-2012, 12:20 PM   #3 (permalink)
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If the magnet is full of metal that could be a bad sign, but do what sonic said. Drain the pan and clean the magnet. You can spray it out with a high flash point solvent like brake cleaner. If you don't have a magnet on there, get one.
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Old 11-12-2012, 01:30 PM   #4 (permalink)
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In the AX4N there is a circular magnet on bottom of the pan, sitting there stuck under it's magnetic force. It has even a round indent in the pan for the center hole.
Bad part is that there is no drain hole for the pan. It just leaks around the edge... start with the lower side bolts and put a oil pan there.
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Old 11-12-2012, 09:01 PM   #5 (permalink)
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Do the above and replace the salvage yard vss with a new one from a parts store. ~$20-25 for your ax4n tranny.
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Old 11-13-2012, 09:53 AM   #6 (permalink)
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Quote:
Originally Posted by sheila View Post
Do the above and replace the salvage yard vss with a new one from a parts store. ~$20-25 for your ax4n tranny.
Do what Sheila said. I would never put JY electrical parts as critical as a VSS in any of my cars.
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Old 11-13-2012, 04:13 PM   #7 (permalink)
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Thanks for the advice. I generally agree on the electric parts comment but i was there anyway getting a PS gear and for $3 now I know what the problem is.
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Old 04-07-2013, 09:59 AM   #8 (permalink)
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Over New Years I changed the tranny fluid, filter, cleaned the pan and that pan magnet was loaded with very fine material. Checked the VSS and there was no shavings on it.
Several thousand miles have passed, and no trouble since.
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