07-13-2009
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#1
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immune from paybans
Join Date: Oct 2005
Location: West Des Moines
Drives: poorly
Posts: 4,358
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Cyclic thumping sound from rear wheel
This is on my girlfriend's 2001 Escort zx2, when going around right corners somewhat fast the rear end seems to have this clunk/thump sound which sounds to be directly related to how fast the wheels are spinning. Not on left corners though, so I'm thinking it's the rear driver's side wheel area since that would be the outer wheel getting more force on a right turn. It doesn't make any sounds under slow turns, but gets louder the harder you turn.
Any ideas what it could be? It's got 95k miles on it, all original parts.
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07-13-2009
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#2
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Smells like cat poop
Join Date: Feb 2007
Location: maple grove
Drives: an evo's fat korean cousin
Posts: 2,549
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Re: Cyclic thumping sound from rear wheel
I'm not familiar with these cars, but... have you checked the rear sway bar links/bushings? Maybe the shift of weight when turning it causing it to make that noise. Or could it be a wheel bearing - if I'm understanding you right, it will clunk over and over with the speed of the tire.
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07-13-2009
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#3
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Shit Rocket Pilot
Join Date: Oct 2003
Location: Shoreview, MN
Drives: 2003 Evolution VIII
Posts: 7,752
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Re: Cyclic thumping sound from rear wheel
Rhythmic sound related to speed and turning = wheel bearing
__________________
"If everything seems under control, you're just not going fast enough." -Mario Andretti
03 Mitsubishi Lancer Evolution VIII
Quote:
Originally Posted by Tachyon
Every minute you spend in your Evo, not in boost, is a minute of your life you'll never get back.
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07-13-2009
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#4
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Re: Cyclic thumping sound from rear wheel
A wheel bearing would cause a whine typically, not a thump. I would say if the car have ball joints in the rear, it could be that.
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07-13-2009
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#5
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Shit Rocket Pilot
Join Date: Oct 2003
Location: Shoreview, MN
Drives: 2003 Evolution VIII
Posts: 7,752
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Re: Cyclic thumping sound from rear wheel
Quote:
Originally Posted by A//// Guy
A wheel bearing would cause a whine typically, not a thump. I would say if the car have ball joints in the rear, it could be that.
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Having the sound increase and decrease based on turning would have nothing to do with ball joints, specifically if it's also related to speed.
__________________
"If everything seems under control, you're just not going fast enough." -Mario Andretti
03 Mitsubishi Lancer Evolution VIII
Quote:
Originally Posted by Tachyon
Every minute you spend in your Evo, not in boost, is a minute of your life you'll never get back.
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07-13-2009
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#6
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Re: Cyclic thumping sound from rear wheel
Sure it would, the tighter you turn the clunkier it could get.
It does sound like it could be a wheel bearing though the more that I think about it.
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07-13-2009
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#7
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immune from paybans
Join Date: Oct 2005
Location: West Des Moines
Drives: poorly
Posts: 4,358
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Re: Cyclic thumping sound from rear wheel
I'll do some more spirited turning today at different speeds to verify, but I'm pretty sure the frequency is speed dependent. Loudness is force dependent.
I was thinking wheel bearing at first, but was hoping for another possibility.
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07-14-2009
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#8
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Join Date: Oct 2005
Location: The land of the next-gen HMMWV
Drives: A BMW
Posts: 1,875
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Re: Cyclic thumping sound from rear wheel
I'm voting wheel bearing. Ball joints and sway bar links/etc don't typically have a cyclic thump that relates to wheel speed.
__________________
Style's automotive engineer
Sponsored by DB Performance (dbptuning.com)
A dsm, a bimmer, a DORGE CUMMINZ, and a non running DSM race car... for now.
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07-14-2009
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#9
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Join Date: Apr 2007
Location: Hollywood, Florida
Drives: 97 GSX
Posts: 222
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Re: Cyclic thumping sound from rear wheel
loose lug nut...maybe
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07-14-2009
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#10
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Crash Course Racing
Join Date: Oct 2003
Location: Skid Row
Drives: in circles
Posts: 2,623
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Re: Cyclic thumping sound from rear wheel
Check your lugnuts (ask Halon about that one )
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07-14-2009
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#11
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Join Date: Nov 2005
Location: Cottage Grove
Drives: Silver '02 IS300, Blue '06 Suzuki SV1000
Posts: 5,293
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Re: Cyclic thumping sound from rear wheel
I would say to check lug nut tightness, and if that doesn't fix it, it's most likely a wheel bearing.
__________________
'02 Lexus IS300
'06 Suzuki SV1000: Back on the road and ripping hard as ever!
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07-17-2009
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#12
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immune from paybans
Join Date: Oct 2005
Location: West Des Moines
Drives: poorly
Posts: 4,358
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Re: Cyclic thumping sound from rear wheel
Well I don't think I'll ever know for sure what it was. Emily took the car in for an oil change because I didn't have time before we left today, and they rotated the tires. They also said she needed new outer tie rod ends (I could shake the wheel back and forth a lot, it was bad), so we got some at oreilly's for 1/3 the goodyear cost and had that done too. Well now the problem seems to be gone, so who knows.
I know there was a vibration issue in the front end which I thought was a tire out of balance, but it was probably just the wheels shaking because of the bad tie rod ends.
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