I forgot to mention that I had a 1993 XJ6 and 154,000 miles on my first
> posting. Sorry, it's my first attempt at this.
>
> The howling and vibrations start at 50 mph and continues at higher speeds.
> It does tone down just a bit, but not much. As I let it fall below 50mph
> the noise and vibrations stop. Again, the rear wheel bearings have just
> been replaced. When the weight of the car is taken off (going over a rise
> in the road) the howling will deminish until the car bottoms out again. >
> I guess my next point of attack will be looking at the bearings in the > differential. >
> Thank you for any and all help you can send my way.
>
>