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1999 Ford F-250 Super Duty Question: speedometer quit working today and automatic shifting was very rough,

 

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trucker50, 5.4L V8, Sour Lake, TX, February 19, 2013, 18:57
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also abs light comes on. What is causing this? Thanks

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  • Answer #1

    pushrod February 19, 2013, 20:46
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    See next 2 answers! It's better than what i had.

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  • Medium-star Best Answer
    bmdouble February 19, 2013, 21:42
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    rear differential speed sensor.I could fill a swimming pool with all of them that I have replaced over the years.

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    pushrod, February 23, 2013, 07:07
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    I thought that sensor was just for ABS, did not know it affected spedo. operation.
    Good to know!

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    truckers, July 03, 2014, 16:54
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    mine is doing the same thing speedometer stoped working shifted hard till the abs light came on and then shifted fine I changed the speed sensor in the rear diff. plus the connector still did it it is up a ford now they changed out the abs control moduler. but it is still doing it and its still at ford they don't know what is wrong with it

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    pushrod, July 03, 2014, 19:00
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    Ain't always what ya think it is for sure.... What fixes one just might not fix the next one!!!

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  • Answer #3

    Greg's Orange Auto (12997 Answers) , Orange, CA - (714) 361-9386
    globalhelper February 20, 2013, 07:01
     Master

    agree with double for sure. poss fill a large lake

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