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Discussion Starter #1 (Edited)
2002 V6 GLX Wagon 4Motion

My son's car. He's been experiencing the rumbling under the center of the car during acceleration up to a certain RPM for over a year. I had read about these bearings and figured that was the issue. I am looking for feedback regarding how much play should be in said bearing.
Here is a video showing how much play there is. I can't believe that there should be that much. Rubber between bearing and brace should be much more solid in my opinion.

Song in video it Killing Time by The Tragically Hip (RIP Gordie)

 

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in dire need of an organic chemistry lesson
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But what are the conditions of the motor mounts?
 

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Discussion Starter #3

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AM not sure about that rubber piece (may be worn out) but then why it wobbles to a certain RPM and not after that?
 

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Discussion Starter #5
AM not sure about that rubber piece (may be worn out) but then why it wobbles to a certain RPM and not after that?
It comes and goes, but is most obvious during the first few seconds of acceleration. Am thinking I'll just replace it with one from 034Motorsport. Way less expensive than a whole new driveshaft. I've put in an email (no phone support because of Covid) to request the correct part.
 

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There should not be any slop in the bearing in the direction you show in the video. The bearing should be held in place centrally in the carrier (rubber isolation).
That must have had quite a vibration at certain speeds.:oops:
 

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Discussion Starter #9

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How has that one held up?
It's good, but I also had a bad U-joint that caused me to pull the driveshaft again to have that replaced. The shop that did the U-joint did not balance the shaft perfectly, so I have a very slight vibration from 45-75. I was waiting to pull that for when I would replace the clutch and motor, but I don't know if I will as I rarely drive anymore.
 

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Discussion Starter #12
Driveshaft is out. Had a little issue with the back end being stuck to the differential flange but it came loose. The bearing sounds ok but the rubber isolation had separated from it half way around. Now I just need to figure out which replacement support bearing to buy.
 

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Discussion Starter #13 (Edited)
Just to update.

Got the driveshaft apart...installed new carrier bearing...reinstalled driveshaft. Messed with the alignment myself and got it close, but ended up taking it into VW to have it properly aligned. There is still some rumbling at low speeds that they say is because of play in the rear final drive. And there is. I just thought it was because the driveshaft was not properly aligned.

So...I've found a 2001 Audi A6 2.7t (closest option locally) with no play. But there is a question. Is it compatible (gear ratio wise of course) with my son's 2002 V6 Passat.

2002 B5.5 Passat...V6...FAS transmission...rear final drive is 4.111 (i think)
2001 C5 A6...2.7t...FAQ transmission...rear final drive is either 4.111 or 3.511

According to this 2001 Audi A6 it should work as long as the Audi is a Manual. Weird, seeing as the Passat is an Automatic. Or is that a typo? Is that even a reliable spec sheet?

Don't ask me if the Audi is M or A because I didn't check this morning. DOH!

EDIT---- It's an Automatic.
 

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The A6 2.7T used 4:11 ratio with the 6sp manual. The Passats 4Mo varied, but the FAS also used the 4:11 ratio.
100309
 
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Discussion Starter #15
The A6 2.7T used 4:11 ratio with the 6sp manual. The Passats 4Mo varied, but the FAS also used the 4:11 ratio. View attachment 100309
Yep. Thanks for that. I guess I'll be on the lookout for one elsewhere.
And it's 4.111:1 ratio.(y)
 

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You can also find some in 4Mo Passats. My rear diff was CUB, so it matched the 6sp manual I swapped in from an S4.
100317
 
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