michaelmetcalf Posted June 17, 2009 Share Posted June 17, 2009 Hi - I know there is a big thread on the transmission hesitation but I haven't quite seen this as a symptom. I just bought this car with 58k miles and it does not appear to have any of the ECU updates/fixes. MY issue is this: When I am braking to come to a stop, and if the stop is not really slow, I feel a really harsh and delayed downshift at around 20 mph or lower. Very noticable. I don't feel this if i am coming to a slower stop, probably because the car is already in a lower gear. Have any of you had this problem? For those that did, would the TSB ECU updates help with this? Thank you. Quote Link to comment Share on other sites More sharing options...
George_Jetson Posted June 18, 2009 Share Posted June 18, 2009 The flash appears to mainly deal with up shifts. I am not sure if it would affect the downshifts, but are you sure that the car has been flashed? look under the hood for a sticker, it will indicate if it indeed has been flashed. I have attached a copy of both of the two possible ecm flashes. Quote Link to comment Share on other sites More sharing options...
michaelmetcalf Posted June 18, 2009 Author Share Posted June 18, 2009 The flash appears to mainly deal with up shifts. I am not sure if it would affect the downshifts, but are you sure that the car has been flashed? look under the hood for a sticker, it will indicate if it indeed has been flashed. I have attached a copy of both of the two possible ecm flashes. Hi - thanks for responding. It has not been flashed as there is no sticker, so I am optimistic that it will help. My only hesitation is if the RPM on the first couple gears will seem strange, but I would think Lexus wouldn't have released this if it wasn't a reasonable fix. Any input would be great. Thanks Quote Link to comment Share on other sites More sharing options...
George_Jetson Posted June 18, 2009 Share Posted June 18, 2009 Things change with a little wear and mileage. At first I was sceptical, but when I worked at chrysler. I had a diesel ram, with auto tranny come in. With over 30k miles, the complaint was hunting with the lockup clutch. There was a TSB to flash the pcm, so I flashed it. Problem solved. If I had not done it myself, I would not have believed it. So, Keep a open mind, it may help. Quote Link to comment Share on other sites More sharing options...
SW03ES Posted June 18, 2009 Share Posted June 18, 2009 Mine has never done anything like that. The transmission in general is a little clunky at times, but nothing like the issue you're describing. Mine has been reflashed twice, go ahead and have it reflashed and see if it helps but I doubt thats the issue... Quote Link to comment Share on other sites More sharing options...
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