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Thud, bump when changing gear at low RPM

Tiny
AMPIKO
  • MEMBER
  • 2003 TOYOTA CELICA
  • 1.8L
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 130,000 MILES
Experience a sever bump, thud sound when car goes into the second gear at low rpm. Sound and thud is less noticeable if I accelerate harder.

Also at times, when I turn slowly at low rpm I feel front tires shudder/vibrate like jackhammer for two to four seconds.

Thank you.
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Sunday, January 7th, 2018 AT 9:24 AM

3 Replies

Tiny
KHLOW2008
  • MECHANIC
  • 41,815 POSTS
Hi AMPIKO,

There seems to be excessive play with the drive train connections. Check the axle shafts and engine mounts condition.
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Monday, January 8th, 2018 AT 1:39 AM
Tiny
AMPIKO
  • MEMBER
  • 2 POSTS
Thanks. I will take my car to the shop.

I also read that out-of-balance tires maybe the cause of periodic shudder/hop/vertical vibration lasting three to five seconds at specific speed, triggered by matching resonance frequency. The rear brake pads were changed last week and maybe the alignment/balancing was not done correctly?
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Monday, January 8th, 2018 AT 8:11 AM
Tiny
KHLOW2008
  • MECHANIC
  • 41,815 POSTS
Yes, tires not correctly balanced would cause shaking of the steering wheels but they would only occur at speeds of at least 80 kph or more and would be rather consistent.
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Wednesday, January 10th, 2018 AT 7:00 AM

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