Speedometer not working

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#11

05-29-2012 | 12:06 PM

Mdub707

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Quote:

Originally Posted by ntmdtr3fan

Yes. The speed sensor on these truck are located on top of the rear axel housing. Pull it out with a 10mm wrench. clean it off and see if it works. If not replace. They sometimes pick up alot of metal shavings which interfers with it. They dont have a speed sensor on the tranny like other trucks do.

Yes, what he said.

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#12

05-29-2012 | 12:49 PM

brondondolon

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Ok cool yeah I went on autozon web site to see what they are going for and the part came up was "tranny speed sensor" or something like that. I'll check it out today hopefully

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#13

05-29-2012 | 12:59 PM

Mdub707

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It should be WSS I believe, wheel speed sensor. They may call it the trans speed sensor though, not sure.

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#14

05-29-2012 | 01:08 PM

TheRobenator

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Joined: Oct 2009

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From: Georgia

Yeah, the trannny speed sensor is located on the top of the 5R110's, and I think there are multiple ones? Make sure you diagnose which one is causing the problem.

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#15

05-29-2012 | 01:10 PM

brondondolon

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Once I replace it will my abs light go off or will I have to take it somewhere to get cleared? My scanner has an abs function but when I scanned it my scanner said my truck didn't support this function

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#16

05-29-2012 | 01:31 PM

TheRobenator

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From: Georgia

Yeah you need a separate ABS scanner I think, I am pretty sure, or you need a scanner that supports both abs codes and engine codes

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#17

05-29-2012 | 02:31 PM

Mdub707

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The ABS light coming on randomly and the speedo acting funny are two classic symptoms of that speed sensor, take it out and clean it first, see what happens.

AE can read ABS codes without issues. I believe an SCT can too, once you download livelink.

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#18

05-31-2012 | 09:03 PM

brondondolon

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So I bought the part from AutoZone and the sensor on top of the diff is the abs sensor I replaced it and nothing happened.

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#19

10-22-2020 | 08:29 AM

Dwayne Coley

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Joined: Oct 2020

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Quote:

Originally Posted by ntmdtr3fan

if you had the cluster out id check over the connections. if that dont would your Speed sensor is located on the rear end housing. Take it out ( i think a 10mm bolt) and clean it off. The sensor is magnetic and the metal shavings sometimes interfer with it. If that dont work it may need replaced or check the connections at your fuse box panel on drivers side fender.
I had my speedo quit working and found that the connections to the fuse box came loose. It had previously had the cab off for engine work and they were not connected properly.

so did that Fix the problem

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#20

11-15-2021 | 08:55 PM

Stumblefoot

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Joined: Nov 2008

Posts: 215

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From: Copperas Cove, TX

Quote:

Originally Posted by Curry

Did you ever figure out the problem bigred? Today when i turned the key it went to 50mph but moved normally while I was driving. As if 50 was 0

Mine did the same thing the other day (06 F350) the next day was fine...no codes no ABS light..Mine is 2X4 and I think the rear axle sensor is for ABS, speedometer should be on my tail-shaft of he transmission. Will crawl under it tomorrow