Listening noises from your car frequently is never reassuring, so hearing noises on your Lexus GX suspensions when you pass a speed bump can be stressing. This warning sign may be a sign of a small problem as well as a warning of a much larger repair to come. In any case, it is necessary to check the source and take the necessary actions to solve the problem, it is with this aim in mind that we wanted to write this document to help you see more clearly. We will first see the possible reasons for a crack when the speed bump passes, then, what can be the cause of a squeaking noise when a speed bump is being passed and finally what to do if you have another noise when a speed bump is passed.
Suspension cracking noise Lexus GX
Check Lexus GX suspension
If you notice a suspension noise when you pass a speed bump on your Lexus GX, and it is characterized by a “clack” or cracking, it is highly possible that your suspension block is the origin of it. In fact, it may be the suspension cups, which, when they are out of date, have the rubber (silentblock) that acts as a buffer and shock absorber for the upper part of the suspension that no longer fulfils its role during small bumps that compress the suspensions. To check if this is the problem that concerns you, take a dented road and pay attention to the noise coming from your front axle as you pass over holes. If it is indeed the cups, think of swapping them as soon as possible or you may damage other parts and have to make more important repairs.
Check the cardan shaft
If you are here because you have researched for “Lexus GX suspension noise” and the suspension is not the cause of your problem, it may be that the cardan shaft is responsible. In fact, when the cardan bellows get out of date and the dirt/dust amasses inside them their working is degraded and it is possible to experience a noise when they are in torsion. To check this, you can try both types of torsion, first vertical with suspension compressions on the speed bump passages, and horizontal when you are going to turn at low speed. If it cracks in these two cases you should consider replacing it or them. If you have the feeling that this noise is more like a a loud noise on Lexus GX, don’t hesitate to read this content.
Check steering hinges/stabilizer bar
Finally, when you experience a suspension noise when your Lexus GX passes over a speed bumps, it is imaginable that the hinges or the stabilizer bar are responsible. Just like the gimbals, the steering part is mobilized when you modify direction. If this is the situation, the components that may have been affected by regular wear and tear or impacts (e. g. sidewalks). The steering hinges, the stabilizer bar hinges. can be the origins of your noises, to check it, place it under the car and apply twists on each of its elements to check that there is no special play on one of them, they are supposed to resist you quite strongly over their entire travel. Please remember to take your vehicle to your mechanic or change them if they are involved.
squeaky noise speed bump Lexus GX
Check the stabilizer bar
If, alternatively, you have a noise that is more like a squeak when you pass a speed bump with your Lexus GX, it is possible that it is the stabilizer bar itself that is involved. In fact, abnormal/pronounced wear of the latter can cause uncommon friction which can create this squeaking noise. Keep in mind to check by going under your car the condition of the paint on your bar which will show if there is friction. Second possible explanation, it may be your stabilizer bar silentblocks that are dried out and cause noise, in which case disassemble them from the cradle and grease them, this should eliminate the problem.
Check engine silentblocks
Finally, last point that we can check together, it is the engine silentblocks, actually, these silentblocks work as pads/shock absorbers between the engine and the cradle of the car, a noticable fatigue of these will make a subsidence and therefore a space between the engine and the silentblocks, it may appear that a squeaking noise occurs when you pass a speed bumps or any holes with your Lexus GX. To swap them go to your mechanic.
Other speed bump noise Lexus GX
If, even though all its assumptions, you still can’t locate the source of the noise your Lexus GX makes when you pass a speed bump, we suggest you to refer to this content on a loud noise on Lexus GX or to visit your mechanic in order to carry an in-depth check on your Lexus GX and identify this problem.
