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Old 06-13-2015, 02:02 PM   #1
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Differential leak

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Anyone have a problem like this? My car is a 2014 GT with only 22k miles on it. When I drive in somewhat low speeds the car rocks back and forth somewhat extreme. There is a popping noise that comes from the bottom of the car (most likely the driveshaft) when I let off the gas and press the clutch, this noise also happens when going up a hill, and when reversing the car.

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Old 06-13-2015, 03:09 PM   #2
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Is it the pinion seal leaking? That's an easy fix. Warranty.


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Old 06-13-2015, 03:48 PM   #3
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The first picture looks very normal , here is a hole in the top of the axle that releases fluid pressure . Mine looks very similar . The differential leak is a different story though .


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Old 06-13-2015, 05:01 PM   #4
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There's another thread about this, I saw fluid on my axle as well and bought the bleeder hose from ford. Can't remember the part number, but we're A-OK now


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Old 06-13-2015, 08:58 PM   #5
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Yeah there is a replacement breather out there apparently. Mine leaks like that as well. Just need to take it in.


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Old 06-13-2015, 09:24 PM   #6
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Quote:
Originally Posted by 2014oxstang View Post
There's another thread about this, I saw fluid on my axle as well and bought the bleeder hose from ford. Can't remember the part number, but we're A-OK now


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We're there any noises? Like knocking with the drive shaft or anything?


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Old 06-13-2015, 10:49 PM   #7
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I had the same issue on my 12. Took it in and got the new breather. The tech over the phone said some fluid is normal but not enough to cover the housing.

As for the question about knocking yes that is what made me look under the car. After the repair you may still hear some noise just have them check the fluid level and add some friction modifier.


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Old 06-14-2015, 12:01 AM   #8
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I just had my 14 TrakPak with 7800 miles in the shop last week with a blown pinion seal. The mechanic said it's pretty common and that there is a new "improved" pinion seal which he put in. The old one is just plastic, the new one is metal.
Mine didn't look that bad though. When we had on the lift you could see where the oil had been thrown up on the gas tank on both sides and it was dripping a little at the front of the rear end. When we had it on the lift I actually pushed the seal back in and then drove 100 miles back home..............it's fixed now.
As for the noise. I may have had the same noise, when shifting, starting out from a stop light.........kind of clunking noise and sometime worse than others. I just attributed it the 2 piece drive and maybe the center universal joint. Now that I have a one piece drive line I don't hear it anymore. What I do hear now is a very definite whine around 2000rpm till about 3000rpm. I took the mechanic for a ride this past week and he is not sure if it's the rear end or transmission. This next week we are going to put it back on the dealer's lift and run the car through the gears to see if they can determine where it is coming from.
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Old 06-14-2015, 12:22 AM   #9
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I forgot to post the pictures I took, but they don't show the pinion. You can see the oil that has been thrown to the left on the gas tank.
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Old 06-14-2015, 07:59 AM   #10
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Check your tsb's. I had the expansion hose put on mine late last year. After my first trip to the track it was leaking just a little. Easy fix if its just coming out the drain hole on top.
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Old 06-14-2015, 10:40 AM   #11
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Quote:
Originally Posted by stangbaby13 View Post
We're there any noises? Like knocking with the drive shaft or anything?


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Negative. I saw the leak when I was under the car one day, googled the issue, and came upon the breather solution and figured it was a no brainer. I believe I paid under 15$ for the part.


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Old 07-27-2015, 07:43 AM   #12
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How often are you suppose to change the diff fluid in these 5.0's. I went in for an oil change last week and they tried suckering me into it for another $100. They say it's suppose to be changed every 38,000 km or about 25,000 miles


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Old 07-27-2015, 08:18 AM   #13
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I usually do every two years or 30k miles.


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