Here recently, I've been having a slight problem and no one seems to know exactly what it is. I've taken it to a couple of mechanics who can't seem to tell me exactly what the problem is, so I figured I'd ask some real people. I'll try to explain this as clearly as possible. It started last thursday night. After travelling at about 65 - 70 mph for a little while, I downshifted to slow down and I hear this loud grinding/whining noise coming from my rear end. It only happens though when downshifting. The slower the speed and the lower the gear, the louder it gets. It does do it in all gears. As long as i put it in neutral and use the brakes instead, I don't usually hear it. I went and got it checked by a mechanic last Friday, and he took the drive shaft off and looked at the U-joint and noticed that there was a spot on the "yoke?" where I guess it had been spinning. He showed it to me and three of the sides looked fine, but he showed me on the one side where it looked as if something had worn on the edges of the "yoke". I'm not too familiar with any of this since I don't have much of a mechanical background. Anyway, I didn't like his analysis of it and wanted a second opinion, so I took it to another mechanic on the same day after work. He drove it, then inspected it. He checked to make sure that nothing was loose, and he said the rear end looked fine, but that it may be bearings in the rear end. Can anyone help me please?!

 

How many miles on the car?If the rear end fluid is low this will cause whining noises to come from the unlubricated gears.

 

sounds like your fluid is old and wearing thin..check that first