Do you have the automatic height control system on your land cruiser or standard suspension?
Is this all the time or only certain speed ranges?
I am not certain what you refered to as the automatic height control system
Yes it drives rough at all times.
Do you have a button that allows you to change ride height?
There is no button or switch I can identify that allows you to change ride height
Ok, I believe you have standard suspension here then.
How many miles are on the truck now?
Have you noticed any abnormal tire wear?
Does the truck seem to pull at all?
Does the truck get unstable when going over bumps?
Can you elaborate on the riding rough issue so that I can better visualize exactly what you are experiencing?
130000 km recorded on the odometer.
No abormal tire wear but because of this problem I change tires twice, just to see if it was cause by the tires.
Does not pull to either side
Certainly unstable going over bumps
Driving on the high way not too bad, driving on normal paved road with bumps the vehicle keeps shaking all over. The dashboard, the brake pedal just about anything.
I can understand that.
Ok if the vibration was still present when in neutral then this eliminates a few things here.
The items remaining here that need to be checked are as follows:
1- brakes! If the rotors are badlky warped or binding it can cause vibrations at all speeds, check all pads/calipers carefully.
2- Driveshafts. You need to put the truck in the air and carefully check the universal joints for any binding or freeplay, I have also seen cases where the rear driveshaft being over greased or under greased will cause the vibrations
3- Suspension.....I feel you are dealing with a suspension issue here, the fact that the truck gies nuts over dips indicates a suspension issue. I would carefully check the sway bars/bushings.connecting rods. I have seen the sway bar brackets come loose from the frame on the front of these before causing this. I will not be online much today for Easter but I can upload any images or diagrams you may need on this.
ASE Certified Technician
ASE Certified, 10+ years experience, Lexus and Toyota Certified
I will have my mechanic check on these areas later this week and see how thing turns out.
Thanks.