When I drive over 20 mph the transmission or rear end is making a whining noise. The faster I go the louder it gets, right now I just turn the volume up on the stereo and pump the 12" subs to drown it out. I don't think it can be good that it's making this sound. Any ideas what it could be??

I just had the transmission serviced at 62,000 miles when I replaced the engine, I'm currently at 67,000 miles. It has been fine up until this week.

I'm on my own with this one since the dealer that I used to go to closed at the end of January. Now the closest dealer is 2 1/2 hours away. Damn, I should've done an engine and tranny swap like Coach is doing!!