LC 200 Vibration at 120Kph and above

[tabrez]

Hi,
I recently purchased a LC 200 4.0 V6 petrol, with around 195k Kms driven on it.
I have this continuous type of vibration which i feel on high speeds (above 120Kph) and some sort of bounciness starting from 80Kph.
I am trying to get rid of this vibration but havent been successful.
Below is the list of things changed:
1. Rear Shocks both (one of them had leakage)
2. Front Shocks both (both were good, but still changed it)
3. Front drive shaft
4. Rear drive shaft
5. 4 new tyres
6. All belts, tensioner, damper
7. Engine mounts and gear mounts
(All things changed with new and genuine parts, not OEM)

Even after changing all these things, with genuine ones, the vibration still hasnt gone. The floorboard, seats, armrest vibrate at high speeds, vibration kicks in at 120kph and above.

i even noticed that if i accelerate it to 160kph and leave the gas pedal, the whole car vibrates while decelerating.

when i lifted on the jack, and held the tyres for any play, none i could find.

Now even after changing pretty much everything, the vibration still hasnt gone which is making me confused, i have done everything right but still no success.

any help will be appreciated.

 

[tabrez]

In continuation to the above, my previous rims were bent, i changed it (all 4), still vibration hasnt gone.

Mine is a 2012 model, land cruiser j200 with 4.0L V6 (the newer 1GR-FE)

I checked the front axles, Left side was tight with no movement, right side had very minor play (which my mechanic said its normal). None of the axle boots were leaking grease.

The front tie rod ends have been greased and tighten again.

None of my front lower arm or upper arm make any squeaking noise or worn out.

i am out of options what to look for

 

[08URJ200]

What about alignment? Based on the bent rims...

 

[linuxgod]

If you rotate the tires front-to-rear does the vibration stay the same or move?

Does the vibration change at all based on engine load or gear? Does it change if you go into Neutral on the highway?

 

[tabrez]

What about alignment? Based on the bent rims...

I had got the alignment done after changing the rims, still the vibration dint go above 120+ kph

 

[tabrez]

If you rotate the tires front-to-rear does the vibration stay the same or move?

Does the vibration change at all based on engine load or gear? Does it change if you go into Neutral on the highway?

Rotating the tyres did not make any difference, i had tried with the old tyres. and new tyres are just a week old so....

the vibration actually starts very little from 80Kph but is prominent once i cross 120+ kph, not as per the engine load or gear.

I did try putting the gear into neutral once i reached high speed, the vibration subsided but was still present. over the weekend i tried my SUV again, i crossed 140 kph till 160kph, the vibration were A LOT!! while driving and when i changed into neutral, the vibration dint go.

Vibration i am getting is at the floor, seats, body, armrest etc, the steering does not shake

 

[linuxgod]

I would double check the U-joints to make sure there's no play and make sure the driveshaft is correctly aligned. There's info in the FSM but the 2-piece driveshaft does have a particular rotation position or you will get vibration. Vibrations originating in the rear tend to vibrate your butt, while those coming from the front end tend to shake the steering more.

 

[Sandroad]

I wonder if the bent rims are important clue. Hitting things hard enough to bend more than one rim could lead to damaged wheel bearings? Rear or front wheel bearings could be suspect in this scenario, but rear might be more likely since the vibration is not in the steering wheel. I would figure out a way to check the rear wheel bearings next.