Please help! My Wife has a Freelander TD4 HSE on an O4 plate. (5 months out of warranty!) Its only done 44,000 miles. A couple of weeks ago it started making a heavy banging noise which sounded like the propshaft was coming through the floor in between the drivers seat & the passenger seat! The whole car also felt a bad vibration between 55 & 65 mph, which felt like it was coming from the back of the car.
I spoke to landrover & various other sources & was told it would be the Viscous coupling. To make sure the problem was drive related, my mechanic removed the whole propshaft & took the car for a long drive. He said it drove 'like a new car', with no vibration & no banging.
I ordered & replaced with a new viscous coupling, along with new propshaft bearings, a new UJ & new diff mounts.
Now the knocking has totally gone, but the vibration between 55 & 65 is still very bad. (which still feels like its coming from the rear)
Can anyone advise what to try next? Its been mentioned that it could be the IRD or the rear diff, but the mechanic doesnt think at 44,000miles it will be. Other people have advised if the VC was damaged for any period of time that it could have put a crack in the chassic. Ive also been told the propshaft may need balancing. All of these ive no idea about, but i dont want to keep throwing ,money at it if im not fixing the problem