Vibration when accelarating

4.6voguelpg · Jan 18, 2017

Hi all,
New to p38 ownership and to 4x4 ownership but when im driving along and give it full throttle there is often a vibration and noise for a few seconds any clues to cause or advice woukd be apreciated. I have a 2000 4.6 model

Wazzajnr · Jan 18, 2017

Could be one of many things.
However, I'd be looking at things like propshaft joints, engine/gearbox mounts, exhaust mounts, misfire on engine.
Probably going to need more info to be able to work out what's causing it.

oakey · Jan 18, 2017

Had a disco that did hat and it was a seized fan bearing if I remember correctly

4.6voguelpg · Jan 18, 2017

Thanks guys the vibration feels like its below me seems to only happen if u give it full throttle or close to it to make it drop gears

Wazzajnr · Jan 18, 2017

Engine/gearbox mounts. Exhaust catching due to weak or broken mounts. Propshaft universal joints.
I'd be looking at those first as they're easy checked.
Just to note, my 4.0 vibrates a bit around 70mph more so under load. I think the props aren't perfectly balanced so I just drive at 60 or 80 where it's smooth as.
Bear in mind, it's an old car with much more heavy steel spinning around under it than your average saloon car so slight vibration at certain speeds I wouldn't worry too much about. If it's bad across the range then check the above.

Mark Piercy · Jan 19, 2017

mine does something like that around 2500 rpm. Mines got 185,000mls. Just worn gearbox and converter... Have some body in it and have a listen underneath (in neutral of course) and see if you can pinpoint it. Oh, while its running that is and get them to rev it up slowly.

Grrrrrr · Jan 19, 2017

I'd be checking spicers. Balancing weights and harmonic dampers all present?

wammers · Jan 19, 2017

Exhaust heat shield crops up occasionally as a rattler.

Grrrrrr · Jan 20, 2017

wammers said:
Exhaust heat shield crops up occasionally as a rattler.

That's a good one. I managed to secure mine with some replacement shock-washers.

SpanishTony · Jan 22, 2017

sometimes exhaust drops a little on to cross member an needs tightening up

Grrrrrr · Jan 22, 2017

4.6voguelpg said:
Thanks guys the vibration feels like its below me seems to only happen if u give it full throttle or close to it to make it drop gears

Any progress?

Willos · Jan 22, 2017

Does it vibrate as in neutral whilst stationary when revved. That would cut diagnostics down

ovalandrover · Jan 22, 2017

check tightness of bolt holding handbrake drum

Mark Piercy · Jan 23, 2017

did you get a chance to have a mooch underneath?

Vibration when accelarating

4.6voguelpg

New Member

Wazzajnr

Well-Known Member

oakey

Well-Known Member

4.6voguelpg

New Member

Wazzajnr

Well-Known Member

Mark Piercy

Well fumbled member....

Grrrrrr

Technician, Bodgit & Scarper Ltd

wammers

No longer with us, RIP

Grrrrrr

Technician, Bodgit & Scarper Ltd

SpanishTony

Active Member

Grrrrrr

Technician, Bodgit & Scarper Ltd

Willos

Active Member

ovalandrover

Well-Known Member

Mark Piercy

Well fumbled member....

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