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Discussion Starter #1
Hi new here. thought i'd just post a problem i have. My car is an 2002 A4 1.8T quattro sport. If i am travelling at say 50mph in 5th gear and i floor the throttle,when i get between 60 and 70 mph i get a rumble noise through the car.Then when i get over 70mph it stops.Also when i pull away on a right or lefthand lock i get a rumble too.My audi dealer said it was the bearing in the propshaft.So i had it reconditioned but the problem is still there. Then i was told by another audi dealer that all quattros make the noise on a lock when pulling away when they get older.Mine has done 77000 miles.Can anyone help please?
 

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My 1999 A6 is currently in the shop for the same problem. The shop is working on it in conjunction with a transmission shop. So far they have narrowed the problem to the CV axle assembly or the front differential. So far its been a tough one to pinpoint because the noise and vibration don't occur when the car is running on the hoist. I'll let you know when I find out.
 

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Discussion Starter #3
My car did make the noise up on the inspection ramp. But when they took the propshaft off the gearbox the noise went away. so i think it might be the rear diff.But i don't know why it makes a noise when the car is on lock if its to do with the rear of the car.You would think it would be the front diff or driveshafts/cv joints.But they seem to be ok.Plus it only seems to get louder the warmer the car is. for example in the mornings when i first pull away i don't seem to get it at all until i've been driving for a while.Many thanks for reply please let me know what you find out.
 

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The quattro setup will make noise pulling away while turning like a rumble and a vibration thoughout the car. This is normal in most cars. some times it becomes excessive due to the wear on the torsen diff and the rear end. Check to see if the prop shaft seal is leaking
 

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Well, the shop is still inspecting my 1999 A6. After consulting with a transmission specialist, they think the problem has to do more with the driveshaft center bearing or the torsion differential. They started to open up these areas yesterday to find out for sure. Im hoping one of these is the problem since the labor is going to get expensive if they tear it apart for nothing. I'll let you know when we find out for sure.
 

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I finally got a call this morning from the shop and the problem was a worn binding joint (at least thats what he called it)at the front of the driveshaft. I think he might be referring to the U joint at the front of the drive shaft. All of the lube had leaked out and the joint was in very rough condition. The stupid thing is that he said the u joints in most Audis, BMWs, etc can't be replaced separately from the driveshaft, unlike most American cars. So instead of buying an entire driveshaft, he recommended having the problem area remanufactured. The grand total comes to $650, so if this fixes the problem I think I am pretty lucky not to spend more. I'll let you know if it fixes the problem for sure.
 

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its still enough cash to spend... (over in the US the audi dealer must charge less than here in the UK!! )

I know im going :eek:fftopic:

My Local Audi dealer charges £105 gbp per hour... that $187 USD per hour --

How much is it over there then??
 

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I never go to the Audi dealer here! Only go there for warranty work. Here in Minneapolis, the two Audi dealers are owned by the same people so they can charge anything they want. I found a great independent Audi/VW/BMW/Mercedes mechanic that charges much less an hour and is very up front with me about repairs that should and shouldn't be done. A good mechanic is worth so much!
 

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yeah i have fopund a independent Audi/Mercedes mechanic how does my work at a nice cheap £40 per hour.. like you say totally upfront and no messing about!
 

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Discussion Starter #12
many thanks for letting me know what they said.A friend on mine is an audi mechanic and he didn't know what it was without taking it all apart.But him and rest of the audi mechanics that work with him say that all quattros make a noise after a while.But when you pay so much for them in the first place you would think that you wouldn't get such a thing.But thats Good old Audi for you. Thanks again
 

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Well I just found out the U joint can't be reconditioned. So I had to buy a new one. Sounds like I'm going to spend about $1100 by the time everything is done. Looks like I'm going to be eating mac and cheese for the next year. haha
 

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I just got the A6 back from the transmission shop. All of the vibrations and chattering noises are gone. (They should be for $1100). Looks like I lucked out and found out what the problem was on the first try. The driveshaft/U joint were replaced and the seals were also changed while everything was apart. I guess I haven't had any major repairs in the 2 years I've owned it, so I've ben pretty lucky up until now. Good luck to the rest of you in solving your drivetrain problems.
 

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You may luck out and not need to replace the driveshaft if the Ujoint isnt damaged. Check first to see if the the fluid level around the joint isn't low. A low fluid level would cause the joint to be noisy.
 
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