Popping Sound from rear when backing up - Ford Powerstroke Diesel Forum
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post #1 of 6 Old 11-10-2007, 04:33 PM Thread Starter
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Question Popping Sound from rear when backing up

I am looking at purchasing a 1999 7.3 diesel F350 Dually with 50,000 miles. It has a popping sound in the rear wheels when backing up and the steering wheel is turned. Is that the rear end? If so, does it need replacing?--
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post #2 of 6 Old 11-10-2007, 05:33 PM
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Originally Posted by rbond View Post
I am looking at purchasing a 1999 7.3 diesel F350 Dually with 50,000 miles. It has a popping sound in the rear wheels when backing up and the steering wheel is turned. Is that the rear end? If so, does it need replacing?--
Sounds like the limited slip differential is popping

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post #3 of 6 Old 11-10-2007, 05:54 PM
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Same here, sounds like the clutches are binding up.Has the diff been worked on recently?

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post #4 of 6 Old 11-10-2007, 08:25 PM
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Add some Friction Modifer to the rearend, I'm guessing rear lube was changed and it didn't have any added to it. My Dodge and a 2001 PSD did the same thing when synthetic was put in them.

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post #5 of 6 Old 11-13-2007, 03:58 PM
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When u-joints start to go out thay start to "Click" when your in reverse.

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post #6 of 6 Old 11-14-2007, 07:33 AM
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full lockers will also do this. wouldn't that be a nice suprise to find you had a $600 detroit in there.

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