range rover p38 rear diff noise

Last week the RR started to make a whirring noise so turned around and headed for home, as i did it started to get louder and a knocking noise also started (also you could feel it under foot )

So we put her on jacks and run at 30 mph clunking coming from rear diff location.

So defo new diff needed ?

Any help appreciated

I'd look at the universal joints first.

Sorry should of said , i had a look at the universal joints and pumped some grease in
But how can you tell if they are failing ?
universal joint was my guess to the knocking noise

pickels said:

Sorry should of said , i had a look at the universal joints and pumped some grease in
But how can you tell if they are failing ?
universal joint was my guess to the knocking noise

Click to expand...

Scotch a rear wheel and lift the other, one get under and check for movement in the UJs.

Scotch a rear wheel , i take it as to wedge/ jam it ? i have not heard that one in a long time

pickels said:

Scotch a rear wheel , i take it as to wedge/ jam it ? i have not heard that one in a long time

Click to expand...

If you lift a rear wheel you lose the hand brake. Unless you want tyre prints across your chest scotch the other rear wheel front and back. A couple of bricks will do it. Or you could use the scotches from the jacking kit.

Get someone to rock the lifted wheel and put your hand on the joints you will feel play before you can see it.

thank's will have a look at them

pickels said:

thank's will have a look at them

Click to expand...

Also check for play in the nose bearing. And backlash of pinion to crown wheel. But you will have to disconnect prop to do that.