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View Full Version : '96 A4 Quattro Differential Noise



kenji422
11-12-2010, 05:49 AM
I have a 1996 A4 Quattro 2.8 with a 5 spd manual. I noticed when driving with no music, and windows rolled up, that there is a scraping/slight grinding noise coming from below the car, sounds like its coming from just below the ebrake area. I only hear it:
-at above 5mph
-when clutch pedal is pushed in
-when coasting in neutral
-or when I'm in gear and a depress the accelerator I hear it momentarily then it disappears, then the same thing when I let off the gas, I hear it for a second then it goes away.

I thought at first it was the clutch, but my local mechanic drove it with me, and he said its not the clutch, as there would be a different sound, and it would be more constant whether the clutch is depressed or not. He said he thinks its coming from a gear in the differential. He said that he would have to charge me "an arm and a leg" to fix it.

He also said if I'm willing to "live with the noise", then it shouldn't really be a problem, as long as I'm easy on the car. I also asked if it will effect my AWD traction in the snow, and he said it shouldnt be a problem.

I'm new to this forum, and just bought this Audi used. I just need a second opinion, and possibly some other suggestions, and how much it will cost me? I've seen used differentials, differential bearings, differential housings on ebay ranging from $25 to $1000. I feel in over my head loL!

Thank you so much in advance for your replies! ;)

ECS Tuning-Audi
11-12-2010, 06:18 AM
Have you tried just changing the fluid? It doesn't take long and is pretty inexpensive. I know changing the fluid can often eliminate whining noises, but it would be worthwhile to see if this could eliminate your noise and extend the life of your diff. I'd recommend changing your fluid using this DIY, (http://audi-diy.blogspot.com/2007/10/audi-a4-b5-rear-differential-oil-change.html) and 2qts of Redline 75W90:

http://c1552172.cdn.cloudfiles.rackspacecloud.com/111605_x800.jpg (http://www.ecstuning.com/ES10752/?salesrep=PWinegardner&utm_source=audizine&utm_medium=forum&utm_content=PWinegardner&utm_campaign=postreply)

kenji422
11-12-2010, 06:21 AM
Have you tried just changing the fluid? It doesn't take long and is pretty inexpensive. I know changing the fluid can often eliminate whining noises, but it would be worthwhile to see if this could eliminate your noise and extend the life of your diff. I'd recommend changing your fluid using this DIY, (http://audi-diy.blogspot.com/2007/10/audi-a4-b5-rear-differential-oil-change.html) and 2qts of Redline 75W90:

http://c1552172.cdn.cloudfiles.rackspacecloud.com/111605_x800.jpg (http://www.ecstuning.com/ES10752/?salesrep=PWinegardner&utm_source=audizine&utm_medium=forum&utm_content=PWinegardner&utm_campaign=postreply)

Thanks for the reply, but I had all the fluids changed (including differential) at Jiffy Lube.

BADB5A4
11-12-2010, 06:23 AM
Jiffy Lube? Did you have the noises happening before you brought it there?
How long ago was that?

ECS Tuning-Audi
11-12-2010, 06:26 AM
If this started after your trip to Jiffy Lube, I would give them a call and see what kind of fluid they used. You need a GL5 compliant oil.

kenji422
11-12-2010, 06:31 AM
Yes, the noises were there before jiffy lube lol! I think I"m not going to jiffy lube anymore, when the tech was putting on the bottom plate (I think its called a skid plate) back on, he looked a little clueless. I think its only Audi dealerships from now on.

ECS Tuning-Audi
11-12-2010, 06:32 AM
Yes, the noises were there before jiffy lube lol! I think I"m not going to jiffy lube anymore, when the tech was putting on the bottom plate (I think its called a skid plate) back on, he looked a little clueless. I think its only Audi dealerships from now on.

Find yourself a good independent shop that knows Audis - and save some serious bank over dealerships. Post up and ask if anyone knows a good one in the Maryland area.