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Senior Member
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Join Date: Jan 2017
Location: san diego
Posts: 3,193
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Senior Member
Join Date: Jan 2017
Location: san diego
Posts: 3,193
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Here is my knowledge and description of weird noises that I have been able to accumulate over the years of constantly abusing, breaking, and upgrading the 4runner:
I get alot of creaks and moans from my suspension due to upgraded poly bushings.. Its very subtle. I only hear this when I'm driving slowly over speed bumps. This never goes away, but it comes and goes. When it does, I spray lube everything thats rubber or poly. You don't feel it, you only hear it. This is normal.
I got a big thump on speed bumps and dips due to a blown shock. Not subtle. You will feel it and hear it. You gotta check around the shocks for oil or oil leak. Not normal.
If u get a thump that you can feel during braking or accelerating.. your suspension bushings are worn, and it could be any number of them. If you go offroading, these get worn out quick. Not normal, you should get it checked out.
I get popping sounds when I do full steering locks due to uniballed upper and lower control arms. Not subtle. It's a loud "POP". You also get whistling if your uniballs need lubing. a light clunk if they are toast (clunk not thump) Spray lube them as much as you can, but it never goes away. This is normal.
I got a LOOOOUD RATTLING sound, when I had a loose bolt on one of the skidplates. Use a rubber mallet with one hand, and lightly feeling the skid plate with the other hand and bang away. You will either hear or feel the vibrations... I also get rattling due to rocks finding their way between the skid plate and whatever its trying to protect. It gets louder and louder the faster you go or the bigger the bumps are. Slower you go, less you hear it. Not normal. Better fix this, because if its a loose bolt, it will egg out the bolt hole on your skid plate over time and then fall out.
If you go offroading...noises are part of the game, because everything will rattle loose. Spindle bolts, lower link bolts, skidplate bolts, compressor mount bolts....Anything not suspension related or engine related, gets locktite or double nutted. Suspension related components and skidplates just have to get checked periodically for loose bolts and nuts.
Best advice is to either get use to doing a post trip inspection yourself or find a good offroad shop and pay them to do it.
If the noises are not offroad related, please ignore my ignorance...lol.
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2016 trail 4runner, twin locked on 34's.
Can read more of my build here (2 parts):
https://www.lasfit.com/blogs/news/ho...ad-build-part1
Last edited by mrblah; 09-21-2021 at 10:29 PM.
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