2011 Mustang Gt - Speedometer Issue

Discussion in '2005 - 2014 S-197 Mustang -General/Talk-' started by hwebb78, Dec 8, 2013.


  1. hwebb78

    hwebb78 New Member

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    Bought a used 2011 GT at a dealer last month with 52000 miles on it. Had a whining/howling noise on deceleration at 40 mph and I noticed thick black oily residue all over the passenger side axle housing. Took it to the dealer last week, they found it was leaking rear end fluid and that the ring and pinion were shot and that they were 3:73 gears that they assume the last owner had installed. The dealer replaced the ring and pinion with stock gears which they said were the 3:15. Now, we have speedometer issues...I'm between 5 -10 mph off depending on speed. Took it back to the dealer this morning, the tech said when he went to flash the computer that is was already current and that he will have to get another technician to do a side by side test drive with another mustang gt and compare mph numbers and report it to Ford so they can look in to this further. Does this sound right? Any thoughts are appreciated.
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  2. johnnyt03gt

    johnnyt03gt Member

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    depends.. area you still running stock size wheels and tires?
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  3. hwebb78

    hwebb78 New Member

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    Tires are stock. Dropped off car yesterday, should find out what the issue is today.
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  4. hwebb78

    hwebb78 New Member

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    Got car back fixed. The service adviser stated that they had to "update the computer software". Not sure if he was talking about theirs or the cars, but whatever all is well.
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  5. FordCustSrvc

    FordCustSrvc Member

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    I know I'm a little late to the party, hwebb78, but I'm happy to learn they took care of this for you. If you ever need me or have questions, don't hesitate to PM me.

    Deysha
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