HELP Allroad front diff bearing replace

[Jdot]

Hi, I'm hoping someone might have done this. I have a 2004 allroad auto that was suffering from vibration over 65mph.. I've had a look and it has lift in the D/S front driveshaft. It's would seem that the bearing in the diff is shot. Does anyone know if it's possible to change the bearings without removing the box and if so a few steps in how to? Or for that matter if it's normal to have lift on the driveshaft?

Thanks

[amiram]

I have the same Issue in the front diff' AR 2002 2.5TDI 230000 KM on the Clock. A year ago, there began a differential oil leak From the oil seal there, I changed the oil seai And From then is no leak but of freeplay of course remains. As you can see in the attached picture There are on in each side before the bearings There are shims 40 possibilities for each side start with 1.00-1.01-1.02......1.95. I'm still waiting for a reason to remove the gearbox from the place and fix it. I have occasionally weak vibrations at high speed.

[Jdot]

Oh ok .. Thanks for that. Did you have any vibrations above 65mph I have a bad one. And how did you replace the seals. The one I need to replace is on the D/S and the bearing need to be replaced is it possible to replace them in situ.
Also I can't see the images

Thanks again

[amiram]

Do you mean the front diff, Right Side driveshaft Output ? The vibration of my car start at 60 mph And lasts up to 100 mph. But this is negligible

[ametlib]

I think you are aiming against the wrong bearing. The picture does not show it but there is a needle bearing supporting the output drive flange( this bearing also happen to be the weakest spot on the 5HP19 fla gearbox)
Good news is it can be replaced with the box in place ( I have done it myself) Bad news is the dealer will not sell you one. But if you have the right measures you'll find one on ebay.

[Jdot]

Yes it's te drivers side front diff bearing. There is play in the shaft. The oil seal isn't leaking. I had a look at the schematic and there seems to be two bearings.. on the inside a standard ball bearing closest to the diff and on the outside a needle bearing closest to the outer casing. I'm guessing that there is probably play in both.
It's good to know it's possible to do this in situ as when I took a look at it it looked a pig off a job to get the casing off. Did you have any problems getting access to the casing and the bearings? I spoke with an Audi technician and he suggested that there should be some play in the shaft and as long as the seal isn't leaking that it's normal and fine. I'm not so sure about that but I guess you have to roll with it. Did it cause the vibration?

Cheers

[ametlib]

There should be zero play in the shaft and the needle bearing is the only faulty one. Every high milage 5HP19FLA have this problem but with the right puller it,s no big deal to change the bearing.
The bearing measures Lenght 24 mm x outer dia 39 mm. Dont know the inner dia but the inner race is the output flange itself. The problem is, since the bearing beeing so short, it takes just a few houndred mm slack in it to give an big slack in the driveshaft

[Jdot]

That's a big help, thanks. I did see this on the diagram and that makes sense. Is it easy enough to get out/get access to? Would you be willing to post a quick breakdown of what to do. It would help me and I'm sure others with the same problem.
Also was the bearing causing vibration above 65mph. Mine causes a kind of timed rhythmic vibration above that speed. Below 65 it not really noticeable.

Thanks

[ametlib]

Have no idea if the bearing causes the vibration on your car but generally speaking a bad needle bearing will manifest itself first at high speeds then when it get worse also at around 30 mph and especially at cold engine. The vibrations
can be felt through the floor.
Changing it is pretty much straight forward, loosen the driveshaft, bend it aside then loosen the bolt keeping the drive flange to the crown wheel carrier. Put something under to collect oil dripping out and pull out the drive flange.
Then pull out the bearing ( I think you can leave the oil seal in place) . The best way to get the new one in is to just use a screw and screw it in

[Jdot]

Thanks for that .. Will check through the other few things that could cause the vibration but I think that sounds about right .. Hmmmm.. Time to change it anyway. Hopefully it won't take too long and hopefully the bearing is readily available at the bearing traders .. Will post the results.

Thanks

[Jdot]

Quick update. I spoke with Makies transmission in Glasgow who are the top place for transmissions in the UK. They said there should always some play in the shaft and that the vibration will be somewhere else. They also said to change the oil. I've done this and changed the tyres. It's was the tyres that was causing the problem and not the shaft.