Replaced the RF CV joint and Wheel bearing in my 2000 A4 Quatro 5-speed manual v6 30-valve, drove 10 ft and small bang. Now it goes no more. Question 1, What did I do wrong? Question 2, With AWD, why are the other 3 wheels not pulling the car? Thanks for any help you can provide.

cv joints should not click as that is the first indication of a failed unit
( going slow and changing direction produces a click,click is a cv joint)
wheel bearings should not be tight as that will produce a humming noise and will result in early failure
because the axle turns with the change of direction ,the distance from the pivot point to the transmission changes and so the shaft will move in and out of the transmission to compensate
take it to an accredited drive line specialist for a diagnosis

Bearing problems in the manual trannies is common, tear it down and rebuild it.

I agree with the axle CV joint choice.
Could also be a brake or wheel bearing failure, but the CV joint is the most likely given the symptoms.

One of your CV joints are bad, inspect which CV joint needs to be replaced. Roll your windows down and make tight right and left corners in an empty parking lot slowly and listen for the clicking noise. If it's coming from the passenger side window or the drivers side window, which ever side the noise is coming from is the side that the CV joint has failed and will need to be replaced.
Thank you for using FIxya and replacing the front wheel bearing improperly buy hammering the CV joint out instead of using a wheel bearing puller will cause damage to the CV joint as to what you have described. Good luck and keep us posted.

this sounds like a bad throw out bearing or clutch plate,

You could have a bad wheel bearing or a bad CV joint. Inspect your CV joint by turning the wheel all the way to the left and inspect the rubber boot for any signs of damage and see if there is any play by grabbing the CV joint and try to move it.
The other way to check is to drive the van slowly in an empty parking lot turning the wheel to one side and then the other. Listen for any abnormal noise and see if you can feel anything lose through you steering wheel.
If there is any signs of damage to the CV joint like oil leaking or movement. Replace the CV joint as soon as possible, and try not to drive the van till you have the CV joint replaced or the wheel bearing. Total CV joint failure will cause you to have the van towed to have it replaced. Try to drive it to the Garage to save you the tow cost.
Thank you for using fixya and be safe.

Sound by your description that your CV joint has gone bad and will need to be replaced as soon as you can. Once your CV joint fails 100%, your going to have to get the car towed to a repair shop. Save some money and have the CV joint replaced be fore you have to get it towed in to a shop or at worst, get you stranded some place where you don't want to be. Be safe and call around for prices to replacing the CV joint. Good luck and keep us posted.

Does sound stop when you turn LEFT?

Turning RIGHT puts the heavy load on the LEFT front wheel.
That initially STOPPED the noise, correct? So why did you change L?

Turning LEFT puts the load on the RIGHT. Did you change the RIGHT?

Let's say this:
If turning RIGHT stops the noise, it's the RIGHT one that's likely bad.
If turning LEFT stops the noise, it's the LEFT one that's more likely bad.

Make sense? Turning RIGHT loads the LEFT wheel; and vice-versa as the WEIGHT SHIFTS AWAY FROM THE TURN.

More than likely it is what some folks call a CV joint problem, not wheel bearings. Try backing up and then going forward to see if "clunking sound" or a sharp "bang" is heard. Wheel bearings and CV joints only work if smooth. Sometimes a BEARING RACE is bad. Also, a bad spindle / part of the CV joint / transaxle assembly worn or badly machined. If in a WET ENVIRONMENT especially, u may want to try marine grade grease or teflon-added grease.




Does sound come from POWER STEERING PUMP area?

Depending on where you took the truck to be serviced, they may have just repacked the wheel bearing and inspected the cv joint when they replaced the speed sensor, but if it was going bad already that would have to have been a major overlook. Unfortunately, if the boots on the cv joint are good and not cracked or loose, there are no other indications of a bad joint other than noise in the front end while driving. Are you sure the cv joint is bad? What are the indications you are having?

10 years is not a long lifetime and wear is far more dependent on mileage. If it is over the 100, 000 mile mark, it wouldn't be unusual to have problems. A number of FWD cars have two CV joints (inner tripodal and outer) so checking only outer CVs may not find the problem. If the car is not a AWD vehicle, it would make sense to raise both front wheels from the ground and then with running engine, go through the gears and simulate the condition under which the problem shows up on the road. This may not be conclusive since the problem might not occur with no load on the drive wheels.