I've noticed that there are a few posts here about a whining noise that seems to come from the rear differential. My 2002 XLT 4.0 seems to have this same problem that you can only hear under acceleration around 45-55 mph.
I have seen on the NHTSA website that there are some TSB's about the problem, but ALLDATA's website doesn't list them as available to get the whole content. Does anyone out there know about the bulletins? I think the most relevant one would be #17736. I would appreciate any information someone could share.
Thanks.