I'm going to try and change the center support carrier bearing and driveshaft u joint tomorrow. Can someone either show me with a picture or tell me where it's located and how to take it off? Thanks!! It's a 95 XJ6 VDP

 

Assuming you have worked on cars previously, it will be obvious once you get under the car. Bur why are you doing this? Did a mechanic tell you they were bad, or are you just guessing? What about the rubber donut (guido)?
In the sticky "How To" you can download the parts and repair manuals.

 

Well, the car has been vibrating since I bought it right around 45 mph and continues and mellows out around 75. I have read everywhere that it is probably the carrier bearing or the driveshaft u joint. So I bought both. The car has 175,000 miles on it, and I know that's a common issue

 

I would also agree about the (guido) donut rubber that sits between the end of the propshaft and the diff.

 

I would like assistance with this as well. I just replaced the flex joint on my 95. When doing so the rubber bit inside the center u-joint just ripped off from being so dry-rotted. Someone said I have to buy that section of the drive shaft now..

 

The center support bearing is available separately.

Make *very sure* that you carefully mark the existing location of the bearing on the driveshaft and the location of the center bearing bracket on the underbody of the car. You don't wanna lose the original mounting positions. If you do you'll likely end up with a vibration and will have to (seemingly endlessly) experiment with the sliding adjustment to eliminate it.

Cheers
DD