04 is300 auto trans shifting problem
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Driver School Candidate
Joined: Feb 2012
Posts: 5
Likes: 0
From: FL
04 is300 auto trans shifting problem
Hey guys this is the problem that I'm having now; my car was parked for 3 days, and the only thing that I did was install a new XS3400 battery & the right wheel bearing. When I took it for a drive, I noticed it wasn't shifting correctly. (shifts too soon) 1st to 2nd is about 5 mph or less than 2000 rpm. When I put the car on e-shift the lowest that I can go is to 3rd gear. If I do it manually and put the car on L it seems that is shifting from 1st to 2nd but when I go into 3rd it doesn't anything. The transmission was done about a month ago by Swift Racing Technology, never had a problem with it until now. I took it to a local transmission performing shop and they said that all the gears are there and they're shifting but there is something that is making the transmission shift too soon. The only solution that they gave me was to take it to the Lexus dealer and have them re-flash my ECU, because I might have touched a cable when I put the new battery in. If any of you know or might have experienced something like this, please give a suggestion on what it can be or what can be done to fix this....Thank you
Driver School Candidate
Joined: Mar 2012
Posts: 13
Likes: 0
From: Arizona
I had this problem with my old Infiniti qx4 when I switched out my stock battery and replaced it with a kinetik 2400 I some how messed up the ecu to where I need to by a new because it was unflashable if that makes sense. I hope that's not the case for you because that damn thing cost me 1200 bucks to replace
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