Troubleshooting grinding/humming noise from front drivers side suspension
#1
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Troubleshooting grinding/humming noise from front drivers side suspension
Good day to all. I'm a new member to this forum. I have a 2008 LS460 with 140,000 miles on it. I have recently experienced a grinding/humming sound coming from the front left drivers side. The sound gets louder as speed increases. It picks up at about 40 mph. I tested the car around curves to see if the weight distribution would change the sound and it stayed the same mostly. my first thought was it could be the wheel bearing going out so I had my mechanic take a look at it and it indeed was going out. He also discovered my upper and lower control arm bushings were shot. I had him replace the wheel bearing first to see if that would make the noise go away and it didn't. The very next week I had the upper and lower control arms replaced(4 total) including the ball joint that is pressed in the steering knuckle since I needed them anyway and hope it would make it go away but it didn't either. I got an alignment, tires balanced and put a new set of michelins on the front. I'm lost at the point to figuring out what it could be because it's incedibly annoying to drive it. If anybody has had a similar or the same problem or has something to say please feel free to comment. I would very much so appreciate it.
#2
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Have you checked the brakes?
#4
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Thanks guys for the responses! I actually had a pair of ceramic pads put on there as well recently. I haven't put new rotors on there yet though. So the only parts I haven't replaced yet are rotors, caliper and the outer tie rod end and the sway bar bushing and link since that is really all is left that I haven't replaced yet. Can rotors make noise even when you don't apply the brakes? In other words it can cause vibration even while coasting?
#5
Pole Position
Thanks guys for the responses! I actually had a pair of ceramic pads put on there as well recently. I haven't put new rotors on there yet though. So the only parts I haven't replaced yet are rotors, caliper and the outer tie rod end and the sway bar bushing and link since that is really all is left that I haven't replaced yet. Can rotors make noise even when you don't apply the brakes? In other words it can cause vibration even while coasting?
Amd sometimes the the rotors can contact the backing plates and make a scraping noise. Where you just had your brakes done I think I'd certainly consider giving them a good look over, some times aftermarket pads don't fit right and can cause a lot of noise problems.
#6
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Thanks a bunch Doublebase. The car does brake on its own at lower speeds between 20-45 mph mostly. I'm assuming that has been the brake assist feature. I'm not entirely sure. The rotor itself looks really rusty and seems like it's been on the car for a long time but I usually change pads and rotors at the same time. I definitely will look over the car and see what's going on when I get the rotors replaced. I told my buddy about it and he gave me a new pair of Raybesto rotors to help me out. I will post the results after I get the rotors installed.
#7
Good day to all. I'm a new member to this forum. I have a 2008 LS460 with 140,000 miles on it. I have recently experienced a grinding/humming sound coming from the front left drivers side. The sound gets louder as speed increases. It picks up at about 40 mph. I tested the car around curves to see if the weight distribution would change the sound and it stayed the same mostly. my first thought was it could be the wheel bearing going out so I had my mechanic take a look at it and it indeed was going out. He also discovered my upper and lower control arm bushings were shot. I had him replace the wheel bearing first to see if that would make the noise go away and it didn't. The very next week I had the upper and lower control arms replaced(4 total) including the ball joint that is pressed in the steering knuckle since I needed them anyway and hope it would make it go away but it didn't either. I got an alignment, tires balanced and put a new set of michelins on the front. I'm lost at the point to figuring out what it could be because it's incedibly annoying to drive it. If anybody has had a similar or the same problem or has something to say please feel free to comment. I would very much so appreciate it.
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#8
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#9
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I had the rotors installed and it seems to have gotten rid of some of the noise but the noise is still there. My mechanic concluded that the wheel bearing is defective and the culprit. It sounds very disappointing considering I just installed a new one almost a month ago but I will have to replace it.
#11
Pole Position
I had the rotors installed and it seems to have gotten rid of some of the noise but the noise is still there. My mechanic concluded that the wheel bearing is defective and the culprit. It sounds very disappointing considering I just installed a new one almost a month ago but I will have to replace it.
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diamente (07-02-18)
#12
Driver School Candidate
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I had a similar situation occur when using an aftermarket wheel bearing...the thing only lasted 7,000 miles before it became loose. I ended up getting my money back and bought a Koyo, which supposedly is an OE bearing. I paid $225 for the wheel bearing, which is 1/3 of what I'd pay for a Lexus wheel bearing....25k miles later and it's doing great.
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