P38A Rumbling

oakey · Sep 12, 2020

4.6 auto 198k 1996
Not done many miles since lockdown but tried to give her a run every week.
I am now getting a rumbling noise on over run
Oils and filters were all changed recently and UJs greased.
Last thing before rumbling started was a new back tyre.
Wheel nuts are tight
Anybody got any ideas where to look?
Ta much

Mark Piercy · Sep 12, 2020

Change the tyre position or take a prop off one at a time and see if it isolates the rumble?

oakey · Sep 12, 2020

Changing tyres over would be easier.
Will try that ta

Mark Piercy · Sep 12, 2020

You iz welcome!

Grrrrrr · Sep 13, 2020

oakey said:
4.6 auto 198k 1996
Not done many miles since lockdown but tried to give her a run every week.
I am now getting a rumbling noise on over run
Oils and filters were all changed recently and UJs greased.
Last thing before rumbling started was a new back tyre.
Wheel nuts are tight
Anybody got any ideas where to look?
Ta much

Diff bearing. It'll run for years like it. Changing fluid might help.

oakey · Sep 13, 2020

I changed fluid few weeks ago but that is what it sounds like

RangeRoller dt · Sep 13, 2020

If you can get the wheels up on stands you can turn rear wheel by hand may be able to spot it from there

oakey · Sep 13, 2020

Ok ta I will have a go tomorrow

Henry_b · Sep 13, 2020

Check for movement in the pinion bearing in the front diff, grab the prop flange "fnarr" and give it a push...

up/down it should be tight "fnarr"

oakey · Sep 13, 2020

One wheel from each axle up?

Henry_b · Sep 13, 2020

oakey said:
One wheel from each axle up?

No.

Just check for up and down movement on the diff flange, this bit..

oakey · Sep 13, 2020

Ok thank you

Grrrrrr · Sep 14, 2020

Henry_b said:
No.

Just check for up and down movement on the diff flange, this bit..

Nice flange although looks like it could do with a rub.

P38A Rumbling

oakey

Well-Known Member

Mark Piercy

Well fumbled member....

oakey

Well-Known Member

Mark Piercy

Well fumbled member....

Grrrrrr

Technician, Bodgit & Scarper Ltd

oakey

Well-Known Member

RangeRoller dt

Well-Sprung Member

oakey

Well-Known Member

Henry_b

Think outside, no box required.

oakey

Well-Known Member

Henry_b

Think outside, no box required.

oakey

Well-Known Member

Grrrrrr

Technician, Bodgit & Scarper Ltd

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