transmission issue..I think
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Driver School Candidate
Joined: Mar 2003
Posts: 28
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From: Georgia
transmission issue..I think
Does anyone experience a jerk when downshifting btw 3rd and 2nd at around 20mph? I also get a jerk when coming to a slow stop in automatic, that jerk happens at around 5-10 mph. Are these normal or should I have the trans. checked? 
Lexus Champion
Joined: Feb 2001
Posts: 2,851
Likes: 4
From: Arkansas
Don't know about the 400 with E-shift, but I gate shift my 430 frequently and, in my experience, the 3-2 downshift isn't all that smooth and I also get a bump when, in auto, the tranny drops to first gear (in some circumstances). Since the Lexus tranny doesn't match revs when downshifting, this is normal behavior (compare downshifting a manual trans and dropping clutch without matching revs).
Fluid changed every 10k miles. Complete change, not just a drip and fill. All mounts new. Nothing bad. Just a bit harsher than other shifts. The lower gears have made the change a bit more pronounced which would make sense. at least on my end.
Thread Starter
Driver School Candidate
Joined: Mar 2003
Posts: 28
Likes: 0
From: Georgia
My fluids have been changed on a regular basis much like Pearlpower described, but I still have this same problem I plan to have some service done this week, and i'll be sure to ask them about this issue, along with the sunroof making noise problem I'm having 
. Thank for the insite all. 
I plan to have some service done this week, and i'll be sure to ask them about this issue, along with the sunroof making noise problem I'm having . Thank for the insite all.
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Lead Lap
Joined: Mar 2001
Posts: 442
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From: RI
I also get the jerk but only when e-shifting down from 3 to 2, and only at low speeds under engine braking as you mentioned. Sometimes I'm even lucky enough to get a sunroof crackle to go with it. I just dismiss it as a characteristic of the trans/programming.
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tjschnei
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Jun 5, 2007 06:56 AM