Focus 1.6 petrol diagnosis of light grinding when coasting

[scoobydo123]

Hi all,not sure how to diagnose this, any pointers much appreciated.

It is a Focus manual 1.6 2009. It has developed a noise that you can hear when lifting off/coasting with clutch in or out. If the car is under power you cannot hear the noise (but maybe it is there you just cannot hear it over the engine noise).

Have checked for anything rubbing on the driveshafts and did find that the undertray that goes under the crank was touching the driveshaft secured that but noise still present.

Put the car in the air, currently has space save on and put it in gear and went from first to 2nd and there was a heavy vibration and the traction control was activating on the dash. Turned that off and still there was heavy vibration that felt awful. Only extra thing to mention is that during the test It was on the spacesaver spare as the tyre needs changing. Note that before the space saver was on the issue was apparent. Can only really describe it as a grinding noise from the front of the car. Changed the rear transmission mount as noticed a clonk in the last couple of weeks occasionally when reversing this was completed yesterday when the test mentioned was carried out.

Bit of a catch 22 situation as MOT is due next month not sure if worth spending out on it so maybe get MOT done as it stands and see if it passes to work out next stage? Clutch was done last year Valeo brand as the first cheapo one lasted 2 weeks. Car is not driven with much mechanical sympathy (son thinks he can abuse it and things like this dont happen). Keep saying he will kill it 😞 Mileage is 156000 so quite high.

Edit wonder if the test was flawed as supported the car on the inner part of the wishbone so the wheels were hanging down a bit maybe that was causing the vibration.

[scoobydo123]

ok thanks everyone. I will get it up in the air again supported near the end of the wishbones so the driveshafts are at a more normal angle and also put the original wheel back on so there is not a difference in rotating mass. Will also make sure there is a second set of axle stands as back up in case something nasty happens. Will report back any findings. I think if I take it for MOT and it fails then it is off the road from that point if I understand the legislation correctly.

[scoobydo123]

Thanks all. Got it up in the air again supported so that the driveshafts are in the normal position still cannot run it in gear with engine on without getting traction control light so even when disabled on the dashboard menu I think it is detecting the rear wheels are not moving and maybe that's why the engine jumps around and feels rough as it is inducing a misfire to reduce power?

Here is a video of me spinning the wheel in gear is this just the diff and normal can get less knock if really smooth rotating the wheel
https://drive.google.com/file/d/1gJ5NOWKM3tnuhImWr...

[scoobydo123]

Hi yes understand that maybe my tests were invalid just trying to collect data. When you say does the noise get better or worse when turning assume this is whilst driving? Will try to take it out today and do that test in an open space. Update to follow.

[scoobydo123]

I didn't notice anything when driving forward with full lock on or in reverse. However due to great Britiah weather at the moment it was quite hard to hear even under the normal conditions that was causing the issue due to increased road noise due to wet roads.

[scoobydo123]

]I didn't notice anything when driving forward with full lock on or in reverse. However due to the great British weather at the moment it was quite hard to hear even under the normal conditions that would have caused the issue due to increased road noise due to wet roads.