100 Series TD GXL Auto Vibration

Submitted: Saturday, Dec 02, 2017 at 14:15
ThreadID: 135937 Views:2507 Replies:7 FollowUps:11
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I have recently noticed that around the 2000 - 2200 Rev range I've been getting some vibrations and particularly noticeable when you put the foot down.

There are no vibrations when I rev the motor while stationary.
Mechanic had a look at the tail shaft and universal joints and all seems OK.
He had a look at the CV joints without pulling them apart at this stage and they seem fine.

He says without pulling them apart and looking for wear etc he can't be sure.
The other thing he says it could be is that the tailshaft might be out of balance, and without sending it away he can't tell.
He checked the engine mounts and they are fine.

The vehicle has done 185,000 kms.

I had new BFG all terrains fitted, balanced and a wheel alignment done a few months ago and all was fine.

Can anyone shed some light on what the problem might be? I'd appreciate it very much.

Michael.
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Reply By: IvanTheTerrible - Saturday, Dec 02, 2017 at 14:58

Saturday, Dec 02, 2017 at 14:58
Could have thrown a wheel weight
AnswerID: 615328

Follow Up By: ian.g - Saturday, Dec 02, 2017 at 15:05

Saturday, Dec 02, 2017 at 15:05
Or chipped or torn a lug off a tyre
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Follow Up By: Member - Jennifer B - Saturday, Dec 02, 2017 at 15:39

Saturday, Dec 02, 2017 at 15:39
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.
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Follow Up By: Member - Jennifer B - Saturday, Dec 02, 2017 at 15:49

Saturday, Dec 02, 2017 at 15:49
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.


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Follow Up By: Member - JOHN C16 - Saturday, Dec 02, 2017 at 17:42

Saturday, Dec 02, 2017 at 17:42
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
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Follow Up By: Member - Jennifer B - Saturday, Dec 02, 2017 at 19:31

Saturday, Dec 02, 2017 at 19:31
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.
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Reply By: wholehog - Saturday, Dec 02, 2017 at 20:00

Saturday, Dec 02, 2017 at 20:00
You don't indicate how long you have had the vehicle, any recent work that may necessitate the removal of drive shafts or repair to them, going on the kilometres travelled by the vehicle that however is unlikely.
Wheel balance issues are not directly engine related, but primarily road speed related.
Have a look at the link about Landcruiser drive shaft alignment plane/s, and check that out.
LC shaft alignment
AnswerID: 615332

Follow Up By: Member - Jennifer B - Saturday, Dec 02, 2017 at 20:45

Saturday, Dec 02, 2017 at 20:45
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.
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Reply By: Member - kwk56pt - Sunday, Dec 03, 2017 at 00:58

Sunday, Dec 03, 2017 at 00:58
Consider rotating the tyres from the front to the back to see if it introduces vibration to the steering which will tell you something is wrong with a tyre.
AnswerID: 615340

Reply By: Athol W1 - Sunday, Dec 03, 2017 at 10:07

Sunday, Dec 03, 2017 at 10:07
Jennifer

Whilst you say that the vibration is around the 2000-2200 rev range you do not mention if this is the same in all gears, or just one gear, and until you can tell us this you will be getting a lot of false diagnosis. Also is this vibration a drumming sound or can you physically feel it through some part of the vehicle,(seat or steering wheel, and if the steering wheel does it cause some rotational or vertical type of movement). The rate of this vibration would also help with the diagnosis (fast, slow, wheel speed or about every 2 metres travelled etc)

On the information that you have supplied I would suspect either engine mounts (I believe that there are at least some 100TD's that have hydraulic engine mounts, which can rupture causing the mount to 'solidify' and many mechanics have mis-diagnosed), or a seized universal joint which can only be found by the removal of the respective drive (tail) shaft.

Regards
Athol
AnswerID: 615344

Follow Up By: Member - Jennifer B - Sunday, Dec 03, 2017 at 11:06

Sunday, Dec 03, 2017 at 11:06
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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Follow Up By: Allan B (Sunshine Coast) - Sunday, Dec 03, 2017 at 13:16

Sunday, Dec 03, 2017 at 13:16
.
Jennifer,

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

I should think that eliminates wheel or tyre balance problems.

Cheers
Allan

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Follow Up By: Athol W1 - Sunday, Dec 03, 2017 at 21:21

Sunday, Dec 03, 2017 at 21:21
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
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Reply By: splits - Sunday, Dec 03, 2017 at 12:18

Sunday, Dec 03, 2017 at 12:18
We had two 60 series at work many years ago with similar vibrations. One had a loose torque converter and the other a loose harmonic balancer that ended up damaging the front of the crankshaft.

The tail shaft could be out of balance if a balance weight has fallen off. Not all of them need these weights but if they do they will be little strips of metal about 20 or so millimetres long and about 10 to 15 wide. They will be spot wended onto the shaft near a uni joint. If one has come off you should be able to see signs of the spot welds having been there.
AnswerID: 615348

Reply By: Member - Terry D (Brisbane QLD - Sunday, Dec 03, 2017 at 20:29

Sunday, Dec 03, 2017 at 20:29
Hi Michael
Just another "inexpert" diagnostic opinion..... get a gear box specialist to check it out. I had a 100 series and at 180K started to vibrate in 5th and 4th at about 2000 RPM. Auto fellow said it seems common at those ks in a 100 series, in at least a manual gear box. Rebuild gear box fixed it! It could be many things, just keep checking and eliminating until problem identified/fixed.
Good luck
TD
AnswerID: 615351

Follow Up By: RMD - Tuesday, Dec 05, 2017 at 14:05

Tuesday, Dec 05, 2017 at 14:05
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.
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Reply By: fisho64 - Wednesday, Dec 06, 2017 at 17:38

Wednesday, Dec 06, 2017 at 17:38
The process to locate any intermittent fault is a slow one and one that needs to be addressed methodically.
Athol above has the only logical procedure/suggestion which makes sense.
Taking it initially to any specialist is a waste of time, the trans guy will say spend money on the trans, tyre bloke this etc etc
AnswerID: 615390

Follow Up By: Member - Jennifer B - Thursday, Dec 07, 2017 at 07:09

Thursday, Dec 07, 2017 at 07:09
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.
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