Club Touareg Forum banner

1 - 20 of 188 Posts

·
Registered
Joined
·
3 Posts
Discussion Starter #1
I have a 2004 V6 Treg 75000k, i have owned it for the past 3 years and it's been just fine apart from the odd little problem here and there.... then the dreaded road noise started about 2000k ago and seems to be getting worse. I have read loads of threads, explaining that it is normally the drive shaft bearings that have gone and that most people change the whole shaft and the problem goes away. So i was ready to expect a $1-2k bill when it went into the dealer this week. The noise is worse than before, starts about 20mph, bad at 60mph, noise gets a little better when i give it slight gas, noise gets worse when i coast down the road.

THE BAD NEWS:: the dealer has told me that the whole front differential needs to be changed and that the noise isn't the drive shafts, and that they see tiny metal shards in the fluid. They are estimating between $5k - $6k. I'm not an expert, and i have tried to research as much as i can, but don't see much info on front diff's apart from people talking about off-roading.

I'd be so greatful if some of you guys that know more out there have any comments, so i can challange the dealer. (is it a long shot to ask VW warranty for help).

hoping, Steve.
 

·
Registered
Joined
·
5 Posts
Couple of guys on here and I have the same problem. I've been getting a round around, supposedly they "Can't hear the noise", the other gentleman was able to get the transfer case replaced but that didn't cure it.
 

·
Registered
Joined
·
3 Posts
Discussion Starter #3
One suggestion i have been given from a non VW user was, to disconnect the front driveshaft to just test if the noise is still there, essentially making the car 2wd. I know this can be done on other makes but on the VW will it break any seals? Anyone know if this is possible?
 

·
Registered
Joined
·
109 Posts
This is crazy! I just came here to search for this exact problem.
Must be a temperature vs elastomer related problem.
Mine started humming about 2 weeks ago when the temperature dropped to 60-70F during the day.
 

·
Registered
Joined
·
20,430 Posts
Having you got a slight vibration in the stering wheel?

Not the kind you get when a wheel needs balancing, usually in a specific road speed range, but a consistent and very slight tingling kind of vibration throughout the speed range.
 

·
Registered
Joined
·
103 Posts
becareful those symptoms can be caused by a 'bad tyre' or slighty buckled wheel,
VERY rarely will you get any feedback through the steering wheel from a faulty front differential until its is just about totally gone.
 

·
Registered
Joined
·
62 Posts
Yeah mine has the same problem. No vibration whatsoever. It has to be the front diff since the transfer case does not fix it. It definitely sounds like metal scrubbing. Very annoying
 

·
Registered
Joined
·
48 Posts
I have 2004 V10 which I bought 1 year ago and has the same problem, a low hum groaning from 45 - 65 mph and an intermittent knocking especially when cold at low speed which comes from the drive tunnel. I have swapped the rear propshaft as I originally thought it was the centre bearing (not the famous carrier bearing as this was ok) - if you ever remove the rear prop it feels as though the centre bearing "sticks" around the joint, but I found to my cost that they are designed like that from new. By the way if you live in the UK, don't ever buy from VW they are £570 + vat, if you're prepared to wait a month you can buy direct from GKN (who manufacture for VW) for £350 + VAT.
This did not cure the problem so I sourced a recon transfer box and brand new stepper motor. When I changed the transfer box - not a massive job and no need to remove the drive tunnel from inside the car (carefully lower the gearbox on a hydraulic jack untill you can get to the upper gearbox bolts) several ball bearings dropped out of the CV joint on the end of the front prop so I swapped this aswell.
Result - no change, still same humming etc. I did change the oil on the front diff to see what that looked like and there was metallic slick in the oil. I have swapped the tyres front to back but that made no difference. I have had a mechanic from VW look at it and he suggested everything I have done but also thought it could be a front wheel bearing. I have just ordered a set of rattle detector microphones. Having eliminated everything else it can only be the front diff, a front driveshaft or a bearing. When I do find out I'll post the result on here.
Regards Richard
 

·
Premium Member
Joined
·
1,889 Posts
One suggestion i have been given from a non VW user was, to disconnect the front driveshaft to just test if the noise is still there, essentially making the car 2wd. I know this can be done on other makes but on the VW will it break any seals? Anyone know if this is possible?
Car will not move, this can't be done without looking the center diff.
 

·
Registered
Joined
·
1 Posts
WOW, I have this EXACT PROBLEM, and then some HELP!

I have a 2004 w/59k. V-6 4motion and I have 2 issues. I definitely have the humming noise, and I agree with the above thread regarding higher speeds making it louder.....whilst slowly accelerating at high speeds the noise kind of goes away... until I let up on the gas a bit then the noise comes back right away. It seemed like a bearing noise to me at first, but the noise did not go away as they should while taking sharp turns in either direction, so I didnt think it was the front bearing. The other HORRIBLE issue: once it warms up after ten minutes of driving, at very low speeds when I turn the steering wheel in either direction all the way, theres a nasty popping/banging noise in the front and the whole car jerks and tugs as if its being jolted with every pop that I hear. I can feel it in the steering wheel, it just feels like the front end is going to break away... once I come out of the turn though, it goes away. Happens in both low gears, high gears. Only once it warms up. I had someone say it may be the differential motor, which is 500 bucks or more for the part alone...

Are these 2 separate issues??? Why is it only when it warms up?
 

·
Registered
Joined
·
48 Posts
Bexter ...you're issue is definately the stepper motor. This is a known problem on earlier tregs. A new motor and ecu upgrade (under drivers seat in uk) cures this. When I took mine in to the dealers and discussed all the stuff I'd read about as possible causes of my cars problems he described your symptoms above, classic jerking and pulling at low speed turns. In the UK a stepper motor change and flash cost me £400. The stepper motor can be clearly seen under the car. 5 bolts to fit, engages a splined shaft which operates a wet clutch inside the transfer case.
On a separate point, I have heard you can run the car without a front prop as someone suggested earlier. There would be no oil leaks but it would it would probably play havoc with the ABS sensors and light the dash up like Blackpool pleasure beach.
 

·
Registered
Joined
·
48 Posts
Finally placed microphones on all the running gear (front hub carriers, front diff, rear diff, transfer box) - found that the front diff was x10 louder than the rear, in all other respects the noises were fine. I then placed the clamps at three points on the front diff and quickly identified the problem as being the right hand flange of the diff (not the one on the extended leg). Sounded like a machine gun firing through the headphones! Removed the front right driveshaft to find the flange moves laterally about 5 mm and axially as well. In the UK VW quote £2062 = VAT for a new diff, no-one seems particularly interested in reconditioning them. Trying to get hold of a second hand V10 diff in the UK is almost impossible. Readers will know that all touaregs share the same running gear with the exception of the diff where the ratios are obviously different. I have finally odered a second hand low mileage diff from a familiar auction site (from Germany). By the time I have finished I will have swapped almost all the running gear on the car trying to locate the problem - should have bought the microphone set first !
 

·
Registered
Joined
·
103 Posts
Hi tom, well done your methodical approach you sound take you skills to the main dealers and teach them some diagnostic skills.
Good luck with your 2nd hand diff, hope it cures your problems
 

·
Registered
Joined
·
48 Posts
Swapped front diff yesterday. Took me 12 hours all in. Started by locking air suspension in jack mode and placing car on four axle stands, 2 at the back and two just forward of the centre of the car to give room to move. supported the weight of the engine and gearbox by placing a large hydraulic jack under the auto box.
Undid the universal joint knuckle from the steering column and the four main subframe bolts which bolt directly in to the chassis. removed one lower leg bolt on the left side, both upper wishbone knuckles which allows the subframe to sag by about 10 inch. Undid the three main securing bolts and the 18 double six splined bolts. Found there was then just enough room to ease the old diff out. Replacement was a straight reversal although the diff is quite heavy and took some manoevring when you are laid on your back under the car.
Out of curiosity I stripped the old diff to find the only problem was a worn bearing on the input shaft side. The side bearings, crown and pinions and planetary gears were all fine. And yes this finally cured the problem, no more paranoia listening for that horrendous humming and vibration at speed!!
 

·
Registered
Joined
·
1,864 Posts
Any idea what caused the bearing failure? Any signs of moisture? You should fix that diff and keep it for a spare... ;)

Glad you got sorted. I have a funny "clicking" noise coming from my front drive and even though the symptom (noise) is different to what you guys experience, I've narrowed it down to either the diff or the front propshaft.

It only happens with me on a 35°+ incline, which even my (often used off-road) Treg seldom sees, so I'll live with it for now and have a look at it early next year.
 

·
Registered
Joined
·
48 Posts
it appears to be the rollers and cage separating possibly due to a lack of lubrication at the input flange end. When I originally drained the old diff I would say it had maybe 0.6 litres of oil instead of the recomended 1.0 litres so I would recomend anyone to check their levels. If I could recomend one thing to anyone it would be to invest in a set of listening microphones. Alba manufacture them, I bought a set off ebay for £80, never seen them since....everybody wants to use them!!
 

·
Registered
Joined
·
1,864 Posts
When I originally drained the old diff I would say it had maybe 0.6 litres of oil instead of the recomended 1.0 litres so I would recomend anyone to check their levels.
And you never saw any signs of it leaking? Oil on the floor maybe? That's a lot of oil to just go AWOL.
 

·
Registered
Joined
·
48 Posts
Nothing on floor or on plastic floor cover but this car was 4 year old when I bought it with 42 000 miles on the clock and you assume it was filled correctly on assembly. Trying to fill the diff in situ is an exercise in itself....
 
1 - 20 of 188 Posts
Top