Club Touareg Forum banner

1 - 15 of 15 Posts

·
Registered
Joined
·
1 Posts
Discussion Starter #1
I just had mechanic replace center bearing. Now vibration under armrest at 25 mph. Goes away at about 30 mph. Mechanic says bad center bearing caused driveshaft damage from clunking underside of car. This only happened a few times and I immediately stopped the car. Bearing clunk was infrequent at about 60 mph. Can his Dx be true, or is center bearing out of balance and in need of tuning?
Thanks in advance.
Mike
 

·
Registered
Joined
·
4,052 Posts
Read up on changing the driveshaft.

Driveshaft is balanced at the factory and care must be taken to keep it in balance when you change the center bearing.

If you just randomly take it apart and put it back together, you will lose the balance.
 

·
Registered
Joined
·
1,120 Posts
Well documented issue. More than can be said here. Like nickyt said removing the CB from the propshaft and reinstalling (press fit) can mess up the balance. Another fix is called the "Vertex Solution" (bushing around the bearing) this too can cause some vibration (bushing is polyurethane and more rigid). Most common failure is bushing not actual bearing (hence the Vertex Solution with a repacking of the existing main CB). The clunk you describe (which is felt through center armrest) is bushing not bearing. BUT one solution is to replace BOTH bushing and bearing by dismantling old assembly from propshaft. This would create potential balance issues. Last solution is a new propshaft assembly (available either OEM $$$ or aftermarket)...aftermarket can have balance issues.
Lastly, some vibration between 25 to 35 is normal for even OEM. I realize it more after a failure in my 2007 when I drive my 2008, which is OEM and 100% good.
 

·
Registered
Joined
·
20,430 Posts
Get yourself a new shaft or a reconditioned one - read the threads on here - and use a different workshop to fit it!

There should be NO vibration at all at any speed.
 

·
Registered
Joined
·
261 Posts
Read up on changing the driveshaft.

Driveshaft is balanced at the factory and care must be taken to keep it in balance when you change the center bearing.

If you just randomly take it apart and put it back together, you will lose the balance.
I verify this statement correct.

Sent from my SAMSUNG-SM-G920A using Tapatalk
 

·
Super Moderator
Joined
·
3,813 Posts
As all the above have stated. The drive shaft is a balanced rotating assembly, very similar to your road wheels, if it is not correctly balanced after a rebuild or repair, you run a very high risk of vibration at random speeds due to imbalance.

If the shaft has been dismantled for repair you can sometimes get away with marking its assembly position and re-assemble accordingly. However if you are serious about doing a proper repair the shaft should be dynamically balanced on the appropriate balancer. If the shop you get to do the job does not have a balancer, then walk away.

Stuart....
 

·
Registered
Joined
·
2,701 Posts
As all the above have stated. The drive shaft is a balanced rotating assembly, very similar to your road wheels, if it is not correctly balanced after a rebuild or repair, you run a very high risk of vibration at random speeds due to imbalance.

If the shaft has been dismantled for repair you can sometimes get away with marking its assembly position and re-assemble accordingly. However if you are serious about doing a proper repair the shaft should be dynamically balanced on the appropriate balancer. If the shop you get to do the job does not have a balancer, then walk away.

Stuart....
Sorry stuart
But that is not exactly correct.
I have rebuilt over a dozen shafts and balance has never been and issue.
The key is to ensure that the shaft incl the internal CV joint parts are put back in exactly the same orientation they where when it came from the factory.
I have a clear method of doing this and I can assure you that if it was correctly balanced when it came from the factory it is still in exactly the same state of balance when I have rebuilt it.

I did have 2 issues with vibration in 2 shafts that were directly linked to different centre bearings I tried from a new supplier.
This was the rubber surrounding the new bearing being a lot stiffer than the factory bearings and the bearings I was using prior to the change.
I went back to my old supplier and all good.
This is why I believe that some using the vertex unit and the blue Viagra item have reported some vibration at certain road speeds ( even though it would really be related to tail shaft revolutions).


regards
Drag
 

·
Registered
Joined
·
11 Posts
Just had this exact thing happen to my 08 touareg yesterday, can someone give me advice or links to a good supplier for a replacement center bearing and bushing without having to go to the dealer and over pay. Thanks in advance, jeff
 

·
Registered
Joined
·
20,430 Posts
This is why I believe that some using the vertex unit and the blue Viagra item have reported some vibration
No vibrations from the Viagra, but the Rampant Rabbit, now, that's altogether different!
 

·
Registered
Joined
·
17 Posts
Had been chasing a vibration for a while. Checked everything, tires........ Turns out one weight on prop shaft fell off. I noticed a shadow of rust next to other weight.
 

·
Registered
Joined
·
20,430 Posts
Good spot.

How have you fixed it?
 

·
Registered
Joined
·
40 Posts
I'm noticing a gear vibration as well at low speeds when decelerating, coming to a stop. Gears 1&2 I believe. Temps are in the 20s however this happens when are is at operating temp as well. Is this normal for a 2014 FSI?

I have CPO but dealer usually won't do anything unless it throws a code. What can I point them to?
 

·
Registered
Joined
·
17 Posts
Good spot.

How have you fixed it?
Hi, i tried to get it balanced at a local drive shaft place. They said they could not do it since both ends have swivels and telescopic on both sides of hanger bearing.
I had them weld a weight that was similar in size of missing one, they could not guaranty balance. But after trying it it 90% fixed vibration i had.
Still not 100% happy i have purchased a used one on ebay with low miles, and waiting for nicer weather to install.
 

·
Registered
Joined
·
2 Posts
If I take my 08 Touareg V8 to a shop, to replace the carrier bearing and also to pop the drain plugs to lose water in the plenum and door frames, how much should this cost me?

Thanks..Sandy
 

·
Registered
Joined
·
754 Posts
You can do the plenum chamber and cill drains in 15 minutes yourself.

As for the carrier bearing you can do that yourself in half an hour for nothing, or pay a workshop up to $2,000 for a brand new VW shaft with other fixes in between.

Read the threads on the center bearing.
 
1 - 15 of 15 Posts
Top