Vehicle speed sensor replacement

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Apr 2, 2015 | 01:14 PM

granny_rocket

Thread Starter

More Turbo

Joined: Oct 2003

Posts: 553

Likes: 6

From: North Western New Jersey

Vehicle speed sensor replacement

I went to replace my vehicle speed sensor last week. The original one was giving me a shaky speed reading over 65 mph which is why I replaced it. When I put the new one and I'm now getting a shaky speed on the speedometer at around 45 mph. I bought the part from advanced auto parts so it's not a genuine Motorcraft part. Has anyone run into this kind of trouble before or is there something that needs to be cleaned inside the diff? Just looking for thoughts on how to fix it or should I return it and get a genuine Motorcraft part? Thanks in advance

Apr 2, 2015 | 10:34 PM

oldbird1965

Fleet Owner

Joined: Aug 2004

Posts: 20,421

Likes: 197

From: AZ

I would, my motorcraft one works good. Make sure you check the wiring pigtail good.

Apr 2, 2015 | 11:05 PM

fordpride

Post Fiend

Joined: Dec 2009

Posts: 15,505

Likes: 18

From: Livoina,La

Getting one from ford is a better option but still not guarantee it will fix it. When I changed mine I got three different one from ford before it stopped bouncing

Apr 2, 2015 | 11:07 PM

madpogue

Lead Driver

Joined: Oct 2003

Posts: 8,476

Likes: 37

From: Madison, WI

Quick (well, kinda) test - put the old sensor back in and drive it. If you get the old functionality back (OK up to 65), then the new sensor is indeed a POS. If it's flaky over 45 (or anything lower) with the old sensor, then you've got another problem - pigtail, wiring, tone ring, etc.