Worn drive shaft? or worn Diff or ?

[troogly]

Hi
Firstly...thanks all for the help on cold start injection advice. Now the next 'challenge'.

When power is on I have an intermittent 'grating' noise coming from the back end. At first I thought it was the exhaust vibrating on something but now I'm not sure.

Seems to come in at around 50 mph. Being intermittent its hard to track although perhaps is a little worse as the car gets warmed up.

Take the power off and it goes away. Next thoughts were to a worn diff (but this was replaced only last year) or possibly worn UJ's or worn wheel bearings.

Anyone got any ideas on this less than scientific diagnosis?

Thanks in advance

Troogly

[rev-erend]

If it's definately rear end - it could be suspension seizing up... plenty of wd40 .. and see if it disappears..

[shpub]

Could also be broken springs, worn suspension bearings, chassis cracks....

Steve
www.tvrbooks.co.uk

[350matt]

Jack the back-end so both wheels are off the floor, then wiggle the wheels from top to bottom, a small amount of play is acceptable about 1-2mm at the rim. If its more than this then its likely a UJ needs changing.
Also wiggle the wheel left to right there should be no play at all in this direction, if so then either duff wheel bearing or suspension bush. If thw bearing has gone this will give play in the top to bottom test as well

Matt