There's a very annoying "rattle/winding" sound coming from somewhere in the bottom-front my car when I accelerate. can't figure it out. I almost definitely know it's NOT the exhaust. I have no engine or exhaust upgrades, so whatever that sound is, it's because something's worn out or has a hole in it.

Can anyone help?

 

does it sound like a bad c.v. axle,or maybe wheel bearings,or both.

 

I assume it's an AWD.

Each front axle has 2 rubber gaskets, check them for holes. If there's a hole, the universal joint is gone (or will be soon).

Do the same for the centre shaft.

Advice to all: Normally a driveshaft/joint will last the lifetime of the car if you dont get sand and dirt in it.
If the gasket breaks, it'll be destroyed in no-time. The gaskets for all the universal joints has a limited lifetime, but they are fairly cheap.
Check them regularly, it'll be worth the effort if you can replace a gasket instead of a driveshaft. It's a bit of work doing it yourself (expensive at a garage), but it's not complicated.

 

galilee, he said front so it wouldnt matter if it is awd,gaskets might confuse him, they are tech. called boots.also it could be brakes about to go and no adhesive on brake pad to caliper causing rattle and hum.to your picture, bork bork bork, haha