noise from differential - Ford Mustang Forum
 
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post #1 of 9 (permalink) Old 07-16-2007 Thread Starter
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Question noise from differential

I know one of the possible solutions for the rear end noise is adding 4oz of friction modifier. Where do you add it? I didn't see a fill plug on the stock cover.


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post #2 of 9 (permalink) Old 07-16-2007
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Quote:
Originally Posted by roberto31 View Post
I know one of the possible solutions for the rear end noise is adding 4oz of friction modifier. Where do you add it? I didn't see a fill plug on the stock cover.
On the back of the pumpkin...drivers side. I did it this weekend and it cured the noise on low speed turns.


Dave
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post #3 of 9 (permalink) Old 07-16-2007
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As far as I was concerned it was a warranty issue, I brought mine to Ford and let them pay for the friction modifier as well as the labor.

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post #4 of 9 (permalink) Old 07-16-2007
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Quote:
Originally Posted by tw0scoops123 View Post
As far as I was concerned it was a warranty issue, I brought mine to Ford and let them pay for the friction modifier as well as the labor.
I was going to do the same thing...but I've heard that the noise has come back even after new clutch packs were installed. I bought the friction modifier for $6, and it took me 10 minutes to add it in. That alone is worth not having to deal with the dealership.

Dave
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post #5 of 9 (permalink) Old 07-16-2007
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The last thing I would want Ford to do is open up the differential case.

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post #6 of 9 (permalink) Old 07-16-2007
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Amen Bro,

I did not want them to open my diff. The extra bottle of friction modifier took care of my low speed turn groan.

I thought I remembered that 3/8" drive plug is on the driver's side, front of pumpkin, near the top. Worse part was getting the Roush high enough to fit my big a$$ under the car.

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post #7 of 9 (permalink) Old 07-16-2007 Thread Starter
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Thanks for the info. I, too, try to avoid the dealership service department. Unfortunately, I haven't found one yet whose work quality wasn't suspect, though I'm sure they exist.

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post #8 of 9 (permalink) Old 07-21-2007 Thread Starter
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Added 4oz's of Ford friction modifier ($4.50) and it did the trick. Good fix! Thanks everybody.

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post #9 of 9 (permalink) Old 07-21-2007
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the friction modifier makes things more slippery within the diff. therefor making the clutch packs slip more insted of gripping when both tires start to spin...

J. Lopez
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