[tomcotez]

On the way home on Sunday I noticed a metallic rattling noise pulling at low RPM, a bit like pinking but louder, after a while it stopped but there is a definate vibration when the engine is pulling slowly. It stops if you rev the engine out of gear.

I haven't had time to look closely but I can't see anything obviously wrong with the prop or exhauste pipe. I replaced the engine and trans mounts and prop centre bearing a couple of years ago, any other ideas?

 

[Andrew]

If it's RPM related it's most likely not the driveshaft, but will be somewhere in the engine/trans combo. Grab and wiggle everything. Driveshaft center bearing would likely make noise only when the car is moving, but can't hurt to get under there and check everything.
Andrew

 

[ducatibruce]

Many years ago my 105 broke an engine mount metal tower at the engine end. From memory the symptoms were similar & it was very hard to spot - the mount looked normal at rest.