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Discussion Starter #1
Hi,

Firstly thanks for reading this, i'm a bit stumped. I have a Black 2008 T32 2.5 Kombi. Had it around 4/5 years now, generally does me well but bills are starting to add up (lots of labour).

My 2nd driveshaft went last week (130k miles, first was at 90k), a local garage has replaced the driveshaft but now on full lock (and near full lock), there is a funny noise / vibration.
Seems to happen at any speed, but only when the wheel is turned almost full in either direction.

They tried two different make unofficial driveshafts (Supplier said never had one back for this fault).

The mechanic replaced the dark gearbox oil, as he thinks the noise is coming from the differential. They have now stopped looking at it and suggested driving it with the new oil for a bit. They said if oil change didn't help, they would have to send it away.

Is this a common problem, or is it weird timing and the power steering pump/fluid/belt/tensioner needing looking at?
Or should i just drive it for a bit / bed in the new part/oil.

Thanks in advance for looking.
 

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Is this vibration when you are actually turning the steering wheel? Does it happen when turning the steering and the vehicle is stationary? Does it get worse when turning the steering very slowly?
If yes, I'm afraid they all do it, and the 2.5 is noisier than the 1.9. It's power steering noise.
 

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Discussion Starter #3 (Edited)
Just had a quick test.
At very full lock when stationary there is a vibration and noise, very noticeable but that might of always been there (cant remember last time i full locked while stationary.)

But quite separately when the wheel is quite a lot turned while moving, up until very full lock. There is a very noticeable rubbing / vibration sound. While stationary this isn't noticeable.

the technician initially thought it was one of the rubber boots of the driveshaft, when it gets compressed on full lock. But the other replacement from different make, did the same. Then convinced the noise is coming from the Diff.

Maybe i just need to take it to a better garage (just wasn't sure about his comment about letting the oil bed in)
 

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It can't be the diff if it does it when the van is stationary, only the primary shaft (the one that goes through the clutch centre plate) is turning at that point and even that stops when you press the clutch.

Does the power steering fluid look the correct clean/pale yellow or is it dark? If it is grey it's contaminated with engine oil, it means a new pump as the internal seal is leaking.

Sometimes the pipes can cause a vibration or noise if they are resting against something, try moving them slightly when the noise is happening. Also look out for broken pipe brackets.
 

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Discussion Starter #5
first time i've looked at that fluid. it looks dark inside the green reservoir. but on paper towel from the stick its clear yellow/green colour.

Just to confirm the steering noise, i didn't get when stationary (just full full lock pump noise).

Took it to a garage i know (but are busy for a week or two).
He said the powersteering pump noise when stationary on full lock is normal and some sort of release (forgotten his words now), he was confident that was complety normal.

Anyway we did a bit of a car park road test and he could hear / feel the rubbing/grinding noise i was talking about.

On the ramp with the front jacked up so the wheels can spin / turn.
On full lock there was a vibration could be felt by touching the door/body, as soon as wheel turned less, that vibration would go.
While on ramp I'm not sure i heard the actual noise i'm posting about (busy workshop / engine noise).

He said he'd want to re replace the driveshaft and check it.
Said Maybe it was just a bit too long, putting more pressure on the whole system when under full lock, or something was too tight.

They're too busy anyway (although did kindly spend 20+ mins looking/ ramped it), so Referred me to a local VW specialist (who he knows) and They can look at it tuesday.

Strangely after driving home (about 25mins), the fault has compleltly gone. Which i'm not sure if that's more worrying or going to complicate getting it fixed.

I'm going to take it to the VW specialist to be checked over anyway next week (don't need to drive it much till then)
 
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