89 300TE 150,000 miles I am getting a whinning noise from the rear end. I just had the rear bearings replaced. Between 70 and 80 mph a loud whinning noise can be heard, no other time is it noticable, reading the posts some one said its the rear diff gears, are they wearing out? is it dangerous to drive? is this a major repair? diff lube was changed at 140,000 it didnt look any different than the fluid I put in
Thanks

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'05 Ford Escape 100,000 miles
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'89 300TE 199,000 miles
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