Hi guys please help me to understand the reason of this situation. I have GS450H 2008 70000km.
This happen only at warmed engine.

For example: When i get stop a car in D mode at red traffic lights (for example), after 2-3 sec after stop (in D mode) i feel light kick from bottom of car. It never happens when i`m going at electric engine. It never happens in another modes (R, N, P)

I tested also to apply hand brake immediately after stop, and do not feel the KICK.

What it can be? (thank you and sorry for my english)

 

mine does that sometimes too.
When the engine turns off at the lights, it pops a little.
I think my exhaust is wearing out somewhere but i havent taken it anywhere to have a look yet.
Lexus said the exhaust is perfect unless it shows an error, i dont believe them.
I have 200,000 kms i think my cat or mufflers are leaking or just worn a little.

If you leave it in Sport gear, the engine stays runnign at the lights.
Im guessing it doesnt do it then?

 

I think my issues are like yours. I have just replaced the trans and still the same.
I'm probably thinking about replacing the ecu, but not sure.
This thing happens only when I'm cruising and applying the brakes coming to a stop.
But, when I gas it from a stop and going about 30-40 or so. I applied the brakes kinda hard coming to a stop and it does not happen. Also when I'm going about 50 and I gas it, the trans does not kick down to a lower gear to accelerate. Not really sure whether it's ecu related or rear diff or drive shaft.
This fxcken shxT is a mystery!

 

check your rear calipers, i had 2 rears seized so it would never actually clamp on the rotors at full stop, when the motor disengaged id feel "a kick" when the energy monitor showed the electric motor turned off.

replaced both rear calipers and when i come to a stop it doesnt budge when the motor turns off.