Drive vibration

[devo]

Hi all

Have read all posts I can find and a bit confusing to me trying to find the same symptoms.

Bad vibration
Really appreciate some help
disco 3 Auto 190,000km
No offroad work and no hard driving.
Tyres 90% front / 30% rear

I feel this a drive line rather than tyre issue.
The vibration is pretty bad throughout the cab. I have a feeling it is not from the rear but around the transfer area or towards the front.
The vibration seems to run in something like a 1sec cycle as a unijoint would with old style uni's

Float or very light throttle = vibration
very slight road curve = vibration slightly worse
Throttle off = vibration gone
Accelerate = vibration gone

Have jacked up each wheel. Felt play by hand in all joints.
Front shafts = very slight play inner joint equal both sides
Centre bearing = no movement
Centre rubber bush = visually ok and can be moved slightly by hand.

I am looking for somewhere to start in diagnosing this issue.

cheers to all Devo

[scarry]

Simple stuff first rotate tyres and see what happens.

[Hogarthde]

My experience leads me to say it is the transmission ,

Unhappily , two solutions, put up with it, or new auto.

[PerthDisco]

Forward drive shaft? Check all CV boots.

[Pippin]

Simple stuff first rotate tyres and see what happens.

I agree. The disparity between front and rear (90% Front 30% Rear) is not good over time.

[woko]

Lock up clutch in the torque converter

[DieselLSE]

Sounds like rear prop shaft and/or bearing to me. Easy to check and would be my first port of call before looking at something more exotic.

[devo]

Forward drive shaft? Check all CV boots.

Thanks for the tip
I do have a small slit-oil leak on the crease in the boot of inner left hand drive shaft

Is that a telltale sign of a joint gone

Cheers devo

[devo]

Sounds like rear prop shaft and/or bearing to me. Easy to check and would be my first port of call before looking at something more exotic.

could you explain how to check the rear shaft and bearing pls other than check for play by hand
Is there another check I can make

Cheers Devo

[PerthDisco]

Thanks for the tip
I do have a small slit-oil leak on the crease in the boot of inner left hand drive shaft

Is that a telltale sign of a joint gone

Cheers devo

If a CV boot splits it will rotationally expel all its grease which will be very obvious.

Agree start with wheels first