6th gear grind - Ford Mustang Forum
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post #1 of 7 (permalink) Old 03-16-2016 Thread Starter
Jelly53's Avatar
Joined: Nov 2015
Posts: 7
6th gear grind

Hi got a 2014 5.0 with 25k miles. I noticed 6th gear grinds but when I try the 2nd time while clutch pedal still pressed it doesnt grind. it grinds everytime I try to use 6th gear no matter if it's hot or cold. It's weird it's only the 6th gear the other gears are fine. I don't even use the 6th gear anymore. I haven't had time to take it to the dealer and I'm afraid if I change the fluid and the dealer finds out they might blame it on the new fluid. Clutch fluid is good and I'm pushing the clutch pedal all the way when changing gears. I was wondering what could it be? Bad synchros? I bought the car from an auction and it had some cosmetic damage and as soon I drove it I noticed the 6th gear grind. So I'm not sure when problem might have developed. Thanks

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post #2 of 7 (permalink) Old 03-16-2016
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One gear like that suggests the sixth gear cluster is bad, prob synchronizer. Why this hits high gears is they are physically smaller and can take less punishment. 6th gear indicates possible abuse by a po. A fluid change is unlikely to help this but, you could always try it, save the old stuff and put it back if it doesn't help. Redljne mtl worked best on my last car. It's an easy job to drain and fill. Ford doesn't usually check the fluid beyond making sure some is in there.

If this is the only issue, you can test Ford and see what they say. It is in warranty. Or you could just drive around it with technique. As you go to pull sixth, you'll feel the beginning of the drag as the shifter engages the synchro, wait there for a second to allow the sychro to speed up and the gear will slip right in, grind free.

You may wish to install a shifter bracket or some other form of improving shifting precision. The stock shifter without help is imprecise and a bit flobbery.

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post #3 of 7 (permalink) Old 03-17-2016
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You have a warranty, use it. Take it in, let Ford fix it.

Your 6th gear shouldn't grind, but then MT82s are known for being crap. Mine grinds every now and again, but usually when cold.
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post #4 of 7 (permalink) Old 03-17-2016
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Heck yes use that warranty before it is too late.
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post #5 of 7 (permalink) Old 03-19-2016
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Just had my 2012 GT in for that same issue. Drivetrain will still be under warranty . Culprit was a bad synchro. Ford dealership had the car for about a week and issued a rental for me. Tranny runs better than when new. I would definitely recommend taking it to the dealer
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post #6 of 7 (permalink) Old 03-19-2016 Thread Starter
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Okay thank you very much guys
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post #7 of 7 (permalink) Old 03-19-2016
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As stated you have a warranty... Why would you not use it before it is to late?

Also if you know of an issue and don't get it fixed and say it causes more issues and Ford can prove that they may not cover extra damage...

Take it in soon.

Just my .02

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