I have just got my car back after two weeks in the garage with exactly the same symptoms a knocking noise from front offside which only occurred when free wheeling not under load. If I accelerated or braked the noise went only to come back as soon as I started to free wheel.
Thankfully I work next door to the garage when they lifted car in the air they called me over & with the car in gear me & a technician under car & another in car accelerating & free wheeling a loud clunking was heard from the transmission. Upon removal the flywheel could be moved over 1" side to side
. Thank god it had held together I thought, a new fly wheel was fitted only for exact same clunk/knock to start as soon as car was free wheeled
only this time the noise was not accompanied with flywheel noise.
The noise was pin pointed to OSF wheel bearing which was on the verge of colapse although no free play was evedent. With a new bearing fitted all was fine on the noise front, but this morning my battery give up!
all in all a bloody expensive month. Still love the car though