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Old 25-06-19, 09:42
B_redders B_redders is offline
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Join Date: Aug 2013
Location: Nottingham
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T4 Post Icon T4 Whine under load above 50 mph

Hi all,
I am assuming this is a gearbox / drive issue but have no Idea. My 1999 2.5tdi T4 has a whine, mostly in 4th and 5th when on the throttle and above 50mph.

The tone / pitch of the whine is consistent what ever the speed but the volume gets louder the closer you get to 70mph.

If I take my foot of the throttle the sound instantly goes and its quite again.

I have searched around but haven't come across any threads with the exact same symptoms. Most seem to be whines below 40mph.

Has anyone had any experience of these symptoms or know of anywhere around the Nottingham area they could recommend me take it too?

Many Thanks,
Ben
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  #2  
Old 25-06-19, 09:49
BingleyLion BingleyLion is offline
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Default Re: T4 Whine under load above 50 mph

It could be a wheel bearing. Stick the van on axle stands & have someone drive through the gears whilst you listen for noises.
A worn wheel bearing noise normally comes in at speed on the T4.
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  #3  
Old 26-06-19, 09:06
B_redders B_redders is offline
Van Man
 
Join Date: Aug 2013
Location: Nottingham
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Default Re: T4 Whine under load above 50 mph

Thank for the quick response. I always thought a wheel bearing noise would be there regardless of whether I was on the throttle or not so had ruled that out.

I will take a look at the that.
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  #4  
Old 26-06-19, 12:02
Yellow Campervan's Avatar
Yellow Campervan Yellow Campervan is offline
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T4 Post Icon Re: T4 Whine under load above 50 mph

could it be turbo whistle?
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  #5  
Old 26-06-19, 14:51
hobbyhorse hobbyhorse is offline
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Location: Essex
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Default Re: T4 Whine under load above 50 mph

If it's an 88bhp blue 'I' AJT it'll almost deffo be the gearbox - check the oil level urgently.

Ouch.... another knuckle
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Old 26-06-19, 14:56
Or_GazM Or_GazM is offline
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Default Re: T4 Whine under load above 50 mph

Strange the pitch doesn't change with speed/revs.

I was also thinking turbo, as it would be under boost....but even that should change in frequency, dependent upon load. (Unless the turbo is hitting a "max rpm" and then screaming....)
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Old 27-06-19, 14:50
BingleyLion BingleyLion is offline
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Default Re: T4 Whine under load above 50 mph

Quote:
Originally Posted by B_redders View Post
Thank for the quick response. I always thought a wheel bearing noise would be there regardless of whether I was on the throttle or not so had ruled that out.

I will take a look at the that.
T4's have some odd quirky behaviour hence the several different responses. It could also be an outer CV joint which is heard under load & not overrun.
If you record the noise I'll guarantee someone will know what it is. Mine only came in over 70mph which turned out to be the wife.
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Old 01-07-19, 14:26
B_redders B_redders is offline
Van Man
 
Join Date: Aug 2013
Location: Nottingham
Posts: 16
Default Re: T4 Whine under load above 50 mph

Thanks All for the responses.

I have checked wheel bearing and I can check that off the list. Gear box oil is now the next on the hit list but I don't think it has been opened for a long time if at all as the filler plug will not budge. Maybe a trip to the local garage for that.

Hadn't thought of the CV joint will look into that also.

I will try and record it see if that offers up anything too.

Thanks again
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  #9  
Old 01-07-19, 17:47
pgsi pgsi is offline
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Default Re: T4 Whine under load above 50 mph

exhaust blowing at a gasket or manifold under load or boost leaking somewhere?
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  #10  
Old 02-07-19, 16:15
Koojo Koojo is offline
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Join Date: Mar 2013
Location: South Shields
Posts: 375
Default Re: T4 Whine under load above 50 mph

Quote:
Originally Posted by B_redders View Post
Hi all,
I am assuming this is a gearbox / drive issue but have no Idea. My 1999 2.5tdi T4 has a whine, mostly in 4th and 5th when on the throttle and above 50mph.

The tone / pitch of the whine is consistent what ever the speed but the volume gets louder the closer you get to 70mph.

If I take my foot of the throttle the sound instantly goes and its quite again.

I have searched around but haven't come across any threads with the exact same symptoms. Most seem to be whines below 40mph.

Has anyone had any experience of these symptoms or know of anywhere around the Nottingham area they could recommend me take it too?

Many Thanks,

Ben
There is a bearing going in your gearbox it sits behind 5th gear, itís a box out job to replace.

Think I was quoted £450/£500 quid to do bearing but while box is out I may as well do the full gearbox recon as the rest must be worn as well... thatís my thinking anyway.

Ps mine has been like this for ages only happens around 50mph in 5th, hasnít got any worse In 3 yrs maybe however I did change oil in box as soon as I got van donít believe VW SEALED FOR LIFE B#llocks
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