1998 GS400 Squeaks Braking Over Bumps
#1
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Hey so I've been having these subtle squeaks and chirps when I brake over small bumps the last few months coming from the front suspension that I can't really pick up on video, I've replaced my lower ball joints and outer tie rods and checked nearly every suspension component for torn boots/bushings and play with a pry bar, I believe the previous owner also put poly bushings on the "front suspension rear chassis link" the big arm that is behind the front wheels (not sure what it's really called lol). Before I replaced my lower ball joints I was also having a creak while stopping and vibration at highway speeds but that has gone away since replacing them. Does anyone know what it could be? I was thinking about replacing my upper control arms and sway bar bushings next, but for all I know it could be a problem with the calipers/pads too. Any help would be greatly appreciated!
Last edited by Mehllow; 03-12-24 at 12:23 PM.
#2
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Check the front sway bar links and bushings that hold the sway bar to the frame. Also check if the bushings in the Front Upper Control Arm are poly, or OEM black rubber. Clean and lube all poly bushings with poly bushing lube.
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Mehllow (03-18-24)
#4
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Hey, ive had the same problem. In addition to squeaking/creaking, I also had clunking whenever the suspension needed to go to work (deviations in the road / speed bumps).
Changing the ball joints might’ve fixed just the clunking, but I can’t remember.
But all of the sounds definitely went away after I changed the ball joints, front sway bar bushings, and the caster arm (arm behind the tie rod that you weren’t sure of).
Edit: I second CurlyG’s mention of poly bushings. Make sure you use lots of the lube they come with. Be very generous. Some cold mornings, you may hear squeaking from them because they’re really hard and tight around the sway bar. Still better than rubber though!
Changing the ball joints might’ve fixed just the clunking, but I can’t remember.
But all of the sounds definitely went away after I changed the ball joints, front sway bar bushings, and the caster arm (arm behind the tie rod that you weren’t sure of).
Edit: I second CurlyG’s mention of poly bushings. Make sure you use lots of the lube they come with. Be very generous. Some cold mornings, you may hear squeaking from them because they’re really hard and tight around the sway bar. Still better than rubber though!
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