100 Series TD GXL Auto Vibration

Or chipped or torn a lug off a tyre

Hi Ian.g
Thanks for your reply.
I hadn't thought of that, since I'd only just got the new tyres and all.
If I'd thrown a weight wouldn't I get a wobble at the steering wheel?
There is any wobble at all on the steering wheel, or vibration when free wheeling, only under load.
Michael.
PS. Maybe I should get another balance and start there. It could be cheaper than a mechanic spending hours on it.

Hi Ivan,
Thanks for the reply.
I answered your thoughts on Ian.g's reply by mistake.
I think I might start with a wheel balance and tyre check before committing to the mechanic.
Appreciate your input.
Michael.

Hi Michael,

The cause can be as simple as mud stuck on a wheel rim. I had a similar vibration in my 100 series landcruiser after driving across a wet claypan in the Simpson Desert. The vibration persisted after washing the car in a car wash. The rims looked clean from the outside but when I went under the car I found a lump of clay stuck to the inside of one rim. Scraped it off. Problem solved.

Cheers,
John

Hi John,
I checked for that sort of thing whilst the car was on the hoist at the mechanic's, but everything is pretty clean.
Thanks for your thoughts on the matter.
Michael.

Hi wholehog,
Thanks for your thoughts on this matter.
I've had the vehicle since new and no, the driveshafts have not been removed.
I must admit though, that I noticed this vibration started to occur shortly after the last service. Maybe there could be too much grease put in after reading the thread you put me onto.
Many thanks.
Michael.

Hi Athol,
The vibration happens in all gears. You can feel it physically as the Driver or Passenger. There is no steering wheel wobble or rotation of any sort, but you can feel the vibration coming through and it is constant whilst under load.
I have noticed this morning that there is a faint vibration starting at around 1600 revs whilst I was on a very smooth section of road, but it's most noticeable at the 2000 - 2200 rev range. Once I take my foot off the accelerator the vibrations cease.
Could it be that maybe engine mounts are shot and because of acceleration and rotational forces of the motor, it is throwing something out of line eg tailshaft and or universal joints.
Many thanks for your thoughts on this matter.
Michael.

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Jennifer,

"Once I take my foot off the accelerator the vibrations cease."

I should think that eliminates wheel or tyre balance problems.

Jennifer

As the vibration is there in all gears at an engine speed of 2000-2200rpm then that eliminates anything to do with wheels, axles and tail shafts (drive shafts), as all of these the speed varies with road speed. And as it is only there when under load that eliminates such things as the engine fan or other rotating parts of the engine.

What is left is such things as engine or exhaust mounts that have either collapsed or gone hard with age. As a long shot it may even be the chassis to body mounts that have collapsed resulting in the body now sitting directly on the chassis. There is also the possibility of a stone or similar becoming lodged between the body and the chassis or a stick that has got between the transmission and the floor (have you been bush recently)

What you are describing is typical of the normal diesel engine harmonics being transferred to the body of the vehicle, it is just a matter of finding the track that they are taking, and this may be easier said than done.

Good luck.
Athol

Can't see how a gearbox rebuild would fix a vibration barring a missing tooth on a gear. Far more likely the rebuild repositioned the item causing the vibes and it was then, No more There.

Hi fisho64
You are so right. It's going to be a slow process of elimination I'm afraid.
Thanks for the advice by everyone, I appreciate it.
Cheers
Michael.