LocalIS300

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.

IS3_FTW

iTrader: (3)

There is more activity with the 1st gen IS on my.is. Someone on there can answer your question

Scratchy

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.

LocalIS300

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.

Timn8or

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.

LocalIS300

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.