2003 Audi A6 quattro, automatic .making loud metal grinding noise, wont drive. on 2003 Audi A6 Quattro

2003 Audi A6 quattro. I was driving last night, went to pull out of the parking lot and car started making a grinding sound as if i was dragging something under the car, and then the car stopped moving and will no longer move. I looked and nothing is dragging. But like i said the car wont move, and it doesnt make the sound in park.. but as soon as i put it in drive it makes the noise again.

Asked by for the 2003 Audi A6 Quattro
Check your CV Axles at the wheels.
would the CV axles at the wheels cause it to make the sound when i push the gas pedal? because thats when it sounds the worst. It sounds as if im dragging metal cans under my car. but the cars not moving.
got to check your brakes on the wheel thats locking up..or the side thats grinding..
none of the wheels are locked up, and i can put it in neutral and push the car into the parking lot, it just wont drive. its like its in neutral but its in drive.
If the axle is broken at the joint, it's just like the drive line on a rear wheel drive vehicle has been taken out, and the car won't move. Just fixed two different cars with same symptoms last week. Put the emergency brake on and put it in gear and look at the axles to the wheels and see if they are spinning without the tire moving. Of course I'm talking about an automatic, if it's manual transmission, then it could be the clutch.
what should this cost me in a repair shop?
If it is the axle or axles, they are around $60.00 ea. at O'reillys. the labor is around 1.5hrs. Check the Estimator on top of this page to find out what it will cost in your zip code.
okay. Thank you so much!
4 answers 9 comments
If you start to move and it makes that noise, have your caliper, rotor and brake pads checked. That happened to me and I could smell smoke when driving. It was a terrible metal grinding noise as I was driving it to the repair shop. They found the rear caliper had seized compressed, and wore through brake pads and damaged rotor.
I have the same problem with my 2003 audi a6 wagon only when i start to drive from parking spot it makes a very loud grinding sound like there is something stuck and i let go of the gas and push it doun again and it drives perfect so only when i start and its a automatic can some one please tell me how to fix this problem
I just bought an 04 a6 quattro beautiful car. The previous owner thought it may be trans related as they were driving and heard a loud bang but noticed noting. Now this car in particular has no parking gear, no forward, or reverse gears. Put the selector into reverse it acts like it goes in, down into drive amd acts like it goes in, but no momentum either way. When u shift back into park however there is a grinding noise. Even with the brake on. Broken Axle is what i found on here and another audi forum. My Question is if its all wheel drive, why if 1 axle was broken on one wheel would it do that to the remaining and still lose park... is it because of the cvt ect, that will.provide power to the other wheels because the one axle is spinning?.?. baffles me for real. Im excited because this will be my first really nice car. One that i dont have to fix every other day. The downside is these cars are fussy and if its a trans then im pretty screwed. Bought for $450 has 137000 on it. My gain hopefully
..The other thing i heard is low fluid in the trans or selector inside the center console. Can anyone help or at least verify anything with some knowledge?
Also there appears to be a small coolant leak dripping on the front passenger differential...