I noticed when I accelerate with light pressure on the gas, when the car is shifting from 2 to 3, it slips, and kicks, giving you the feeling that someone rear ended you..Anyone else have a problem like this? Lexus says they found no problems..
Ed

 

If you have a friend with a GS or your Lexus dealer have another pre-owned GS that is the same model/year as yours, then you can probably compare your GS with another.

 

Do you have genuine T-4 atf in your tranny and it is still RED, if not I'd flush it out..........Also ask the tech to erase all memory in your vehicle( ****ing points etc..) so your car can relearn your driving habits.....and take it easy the first few miles.......drive like an old lady.....

 

I have an '02 GS 300. I've also experienced this same problem of the car slipping and then kicking when going from 2 to3. It's an intermitten thing that happens from time to time although it hasn't happened in a while. I took it to back to the dealer shortly after I got the car and they said the same thing that they couldn't find anything wrong. Since my car is a lease and I won't have to worry about the tranny after the warranty is up, it's not worth my time to keep bringing it back until they find the problem.

 

from my experience its the tranny fluid. my mother took my car to a friends shop and they changed the tranny oil it ran fine for about 1k miles then i notice the same exact thing. the kicking hard between switching gears i than flushed my tranny and used lexus factory tranny fluid ran smooth from there on.