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Manual transmission clunking when shifting

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Old Jun 24, 2015 | 10:52 AM
  #1  
LocalIS300's Avatar
LocalIS300
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Default Manual transmission clunking when shifting

I have a 2003 IS300 55k miles, manual transmission clunks when upshifting from 1-to-2 and 2-to-3. I have searched the forums and read a lot of other threads that mention the clunking noise as being "normal." I was hoping to have this issue discussed here. For those of you who claim it is normal, are you saying it
  1. with authority from a dealership or lexus representative?
  2. because you are an employed automechanic (not DIY)?
  3. because you have it, too?

The first two would be comforting, the last is not.
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Old Jun 24, 2015 | 11:42 AM
  #2  
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There is more activity with the 1st gen IS on my.is. Someone on there can answer your question
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Old Jun 24, 2015 | 02:55 PM
  #3  
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mine does this and I'm 100% sure I need new diff bushings. hopefully that will fix it, but i'm not too concerned.

the whole car also has started to shudder hard while drifting, not sure if related.
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Old Jun 28, 2015 | 03:11 PM
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Thanks guys. I took the car into a mechanic and he said the sound was too subtle to worry about it. I don't think it's subtle but I guess I haven't driven many Lexus cars.
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Old Jul 2, 2015 | 11:47 AM
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Depending on my speed and how I am on the clutch, I have a kind of dull thud coming from the rear. Car was meticulously maintained. Not sure if it's normal. Car is silent other than that.
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Old Jul 8, 2015 | 06:56 PM
  #6  
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I have changed the transmission fluid and the rear differential fluid, no improvement.
I have noticed that if I shift very slowly from 2->3, there is no clunking noise. I don't think I'm that hard on this car...my other car is a Honda Fit and it performs beautifully.
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