Rumble diagnosis please

[shimmy]

i have a Rumble!

65-80mph and then again over 100mph only

feels like it is left side of the car and it feels like a faint vibration and rumbling road noise. nothing to do with tyres/rims as they have been swapped

also very recently noticed a clicking sound rear left side at variious speeds

IDEAS?

[_Nathan_]

Does it get louder under cornering load?

[cantfind1]

droplinks for the clicking maybe, you running different anti roll bars?

Rumble not sure, wheel bearing? Balance?

[Bounce]

i have a Rumble!

65-80mph and then again over 100mph only

feels like it is left side of the car and it feels like a faint vibration and rumbling road noise. nothing to do with tyres/rims as they have been swapped

also very recently noticed a clicking sound rear left side at variious speeds

IDEAS?

Sounds like a wheel bearing Shim,i had this on my Mrs Audi,slight vibration and a drone over 60mph.

[shimmy]

droplinks for the clicking maybe, you running different anti roll bars?

Rumble not sure, wheel bearing? Balance?

what are drop links?

[shimmy]

Does it get louder under cornering load?

dont think so

the rumble is not gear related but speed related. cant tell any cornering difference but as it is at 70mph hard to find a corner i can do at 70mph to check!

[_Nathan_]

Drop links connect ARB to moving assembly.

[Dan_csl]

I wondered about a wheel bearing but then they wouldn't click, nothing to do with the diff Shim?

[shimmy]

I wondered about a wheel bearing but then they wouldn't click, nothing to do with the diff Shim?

Got a feeling the two are seperate

Rumble linked to diff and clicking to play in the wheel, prob lower rear wishbones

gonna sort the wishbones and see what's left

if the Rumbles still there gonna swap the diff out back to OEM and see what happens

[thegingerninja]

I had a clicking noise once, turned to be one of the brakes pads rattling in the caliper. Check that the securing springs are correctly fitted and intact.

Droning noise - cheapest way would be assume a wheel bearing, replace it and then road test. Wheel bearing can make some very strange and different noises in my experience when they near the end of their life.

An interesting story with a 996 C4 I had: had a droning noise that increased with road speed, sounded nothing like a wheel bearing, service chap agreed with me. Long story short, they replaced the gearbox under warranty saying the the pinion bearing was goosed. Picked it up after the gearbox was done and the noise was still there! Replaced the rear wheel bearings just to rule them out - and hey presto, the noise had gone. £5000 worth of gearbox and it turned out to be a wheel bearing.....numpty's!

[Dan_csl]

Got a feeling the two are seperate

Rumble linked to diff and clicking to play in the wheel, prob lower rear wishbones

gonna sort the wishbones and see what's left

if the Rumbles still there gonna swap the diff out back to OEM and see what happens

Good idea, shame to have to swap out the 4.1 your running again though (if I'm right in saying that's the one you've got in there at the mo)?

[DuncanR]

Before removing the diff Shim, jack up the rear, both wheels clear of ground, axle stands thank you please for safety, or 2 piles of £50 notes !! .. and run it then under no load and see what it sounds like.

Does the noise go away when you turn the radio volumne right up ?

[shane@mbtech]

I forgot to go out with you for a listen, sorry shimmy.

Swap your diff out to eliminate that.

Then process of elimination. Possibilities..... diff, bearing, driveshaft.

The drive shaft will make a clicking, light knocking if joint worn.

[SpineOnABap]

I've twice had a speed related clicking (quite loud too) from the front wheels and on both occasions it was due to worn out wheel bearing.