Large Grinding Noise

4.6 V8 P38 Auto

A couple of weeks ago I set off out of a junction and had t floor it as a car appeared quite quickly.

I heard a noise that sounded like the front n/s wheel had spun on some gravel (windows closed) and knowing that the tread was getting low assumed that they had just lost grip when I floored it.

Anyway, I thought no more about the noise and changed the tyres a week or so later, along with polybushing which I had been waiting to do (that was a pig of a job).

This week I had to set off quickly again and the window was open, the noise came again and it definitely was not a tyre losing traction on stones.

It was a loud grinding / ratcheting noise coming from the front end somewhere, but difficult to place.

There is no issue with normal driving, but something obviously can't cope with a sudden large increase in torque.

Is this common, any ideas chaps?

Are the CV joint rubbers ok if not there may be a cv joint running dry and worn

Check the VCU

Datatek, is there a procedure on here somewhere that shows me how to check the VCU?

merlinpjl said:

Datatek, is there a procedure on here somewhere that shows me how to check the VCU?

Click to expand...

VCU checks will come up with a site search, it's been covered many times recently, however, jack one front wheel, with a constant pressure it should be just possible to turn it after the backlash has been taken up. You may need a long bar to do it if you are not in shape LOL. If it's impossible to turn the VCU has seized, change it quick before it knackers a diff