All Things Mk5 > How to Guides / Troubleshooting

Whining sound in lower gears . My 07 Mark 5 GTI has developed this sound ....... I have

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GTIEagles:
Mine does it when accelerating and on overrun but is more noisy when accelerating. It actually sounds a bit like a touring car gearbox in 1st and I quite like it providing all is okay!

rich83:
whines when accelerating in 1st gear, more noticeable with pootling around, like in a car park for example.

john87:

--- Quote from: Pudding on August 04, 2015, 04:49:34 pm ---Whines under power or on the overrun?

Yes the gears in the O2Q/O2M MK5 gearboxes are semi-helical (for strength), so prone to a little more whine than a full helical cut gear (02A/02J MK3/MK4).

A common issue in the manual box (not sure about DSG) is the end case that holds the bearings for the gear shafts can ovalise, which over time can misalign the gear meshing slightly.  In extreme cases this can lead to teeth being stripped off (usually in very high boost / big turbo conversions) but generally if the car is stock or the usual stage1/2 stuff, it just causes noise.

Diff whine (sounds like a tram slowing down and is very loud) on the overrun can be an issue too, but not that common.

Layshaft bearing wear causes a marbles in a tin rattling when hot, which goes when you press the clutch pedal down.  Common.

Thing is, VAG manual gearboxes always have been agricultural and noisy, and hate being rushed.  They can go on for years making these noises with no adverse affects, so it's more of an irritation than a major problem.

--- End quote ---

Some good info there!

I've noticed though that the mk5 is very quiet in reverse compared to 'most' cars in its' class.. is this again, related to the gear profiles?

pudding:
Haven't noticed any whining from any of the gears in my 91K old Edition 30.   Something to bear in mind is uprated engine mounts (the side ones especially) will increase noise and vibration quite a lot.   Gearboxes are noisy, rough things and it's mostly that you can feel in the cabin when fitting stiffer mounts.

I've just got a Vibratechnics dogbone, standard side mounts.

Yeah reverse is quiet on these boxes, and syncromeshed.  Older boxes had no syncro (hence the crunch when selecting it) and a cheap straight cut gear since it's hardly used compared to the forward gears.  Manufacturing cost savings and all that.

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