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Noise from Front --- or is it Back?
First of all, thanks for reading this post. I've definately reached the end of my "know how" and could use a little advice. Now to the point: I have a 2000 F250 PSD SWB Crew Cab FWD w/ 235K on it. At around 10MPH you can hear the noise start coming from the front. It gains in pitch the faster you get until it drops out around 50MPH. The noise sounds similar to what off road tires sound like on the highway. However it started on its own before I touched the tires. The noise is not responsive to engine speed or steering. I've replaced both front bearings, nothing. I've replaced both front tires, nothing. Took it to my mechanic (and ex-Ford dealer tech) and he claims the sound is actually coming from the rear, but he didn't have time to work on it. Took it to another local diesel shop, the mechanic drove it around the block and said it was the ring and pinion gear in the rear. He also said it was likely to cost me another $1500-$2000. At this point, I'm open to suggestions.
- Does the diagnosis sound feasible?
- Is the cost estimate reasonable?
- I have access to a lift, is this a DIY job?
I appreciate any help any of you can give me.
BTW, recent maintenance, about 2 weeks before this started, involved swapping out a seal in the rear and changing out the fluid for the first time ever.
Again, I appreciate any advice I can get.