Bumping an old thread here
My Leon (6 speed manual 02Q) has developed a whining noise at around 30mph, present whether accelerating, overrun or even coasting in neutral (even with engine off!) although its worse when gently accelerating from this speed in 3/4/5 gear. It happened overnight, car was fine in the evening and i noticed it straightaway when approaching 30mph the next morning
Drives faultlessly, smooth, engages gears, no vibrations etc. Just sounds like a diff whining type noise that gets higher-pitched the faster you go (so road speed related). Starts at 25mph, at its loudest by 30mph, very feint by 35mph but if you accelerate gently you can just about hear it all the way to 45-50 mph, but its very very quiet by 40mph.
Anyone had this before? Not a lot of info online. Anything i can check or rule out or am i looking at a box? If so, anyone have a decent box? There's no play at the wheels, which i've spun by hand but can not hear/replicate this noise.
Hope somebody can help as its driving me mad, and i keep being told to just leave it to get worse
Cheers