Yep, this noise is a strange one.

On a 06' CTT , I've had it for about a month and started to notice this noise a few days into ownership and I am not entirely sure if it is a normal noise or not.

At around 1800-2000rpm under load, during a standing start (normal to medium agressive) I hear a noise from the front for about 1-2seconds. Its difficult to describe but its sound somewhat like an erratic squeal. Like a pulley with a slight belt slip. When it happens which is virtually every time I take off from a standing start, I can also feel it vibrate through the accel pedal fairly well when it happens.

I've thought of it being either

(1) front diff? if its an electronic type diff with clutches it may be a possibility of noisy clutches - I need to do more research in the design of the differentials of the CTT

(2) Diverter Valve? it is my understanding that factory units over time fail but what type (if any) noises do they produce when they are pooched? Engine boost as per gauge seems to be normal but it could have a small leak somewhere that might not be easily noticed on the gauge

(3) Engine Internally/Turbos? who knows... anyone with experience?

Anyhow, just seeing if anyone out there may sound this all familiar...

 

drive shafts go out in these after 60k or so. Pretty common.

 

drive shafts go? or prop shafts? (ie: cardan shafts)