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post #1 of 2 (permalink) Old 08-05-04, 08:28 AM Thread Starter
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Rear End Howl/Whine

MY 1998 F-150 2wd's rear end is howling/whining. Its completly stock, with a 4.2 V6 engine and 5spd. I just noticed the sounds during a 8 hour road trip I made to the lake. When you hit the throttle the rear end has a high pitched whine. IF you let off the throttle...there is no sounds whatsoever. If you just feather the throttle then it makes a more lower sounding growl. What the heck is going on back there?? I had an axle seal leak about 5 months ago, but I had it fixed. The dealer claimed they toped the rear end up with oil...but know I am starting to wonder about that.

I climbed underneath to inspect it. I thought I would start by draining the old oil out of it and replacing it and seeing if that doesn't cure the problem. Thing is...theres no drain plug. Looks to me that I have to pull the Diff cover off and drain it that way. If thats what needs to be done, how do I go about changing the rear oil. Or should I save myself the hassle and take it to the dealer??

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post #2 of 2 (permalink) Old 08-05-04, 04:15 PM
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Re: Rear End Howl/Whine

To drain diff oil, usually you just take off the lowest bolt on the diff and it will all come out (on my car anyway). New diff oil would be the first thing I'd do as it's not hard to do.

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