2005 Lexus ES 330 2005 ES330 doesn't shift smoothly

  • 2005 LEXUS ES 330
  • 6 CYL
  • FWD
  • 56,000 MILES

I have taken my car to the Lexus dealer and an independent mechanic both of whom say there is nothing wrong with my car. No codes are in the memory and nothing found on diagnostic scan. And of course it never acted up when we had folks look at it. It shifts very roughly between 25-35 MPH and sometimes on takeoff it does the same thing. Also seems to be more frequent the longer it's driven. I'm not sure if it's a tranny thing or a fuel line/accelerator thing. The Lexus dealer said there's an electronic sensor instead of a timing belt mechanism that tells the car when to shift and that it will eventually "learn" my driving habits. It's been a year and has acted exactly the same the entire time. If the electronic piece is removed would that "reset" it and stop the rough shifting?

I really hope you can help.

Many thanks,

Karen Bickers - Lousiville, KY
Wednesday, August 11th, 2010 AT 5:14 PM

1 Reply

  • 75,992 POSTS
Hi kbickers, Welcome to 2carpros and TY for the donation

Have these sensors checked and tested the coolant, throttle and vehicle speed sensors-these sensors input signals to the computer is to how to command and control the upshifts/downshifts/lock-up/overdrive that the computer uses to monitor throttle and governor pressures, similar to Toyota's If it continues you have an internal problem with the transmission could be a shifting solenoid/s sticking or a valve body problem or you have the transmission pressure tested to find out more
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Thursday, August 12th, 2010 AT 3:31 AM

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