IS 250 jerks into 1st when coming to a stop while in drive. When I put the car in neutral to stop it does not. Got the B solenoid replaced, there are no metal shavings in the transmission (which is 1 1/2 years old), the ECU unit has the latest upgrades. I bought a used ECU and it would not start, then I sent the ECU to get repaired and it did not fix the hard downshift. Car runs fine otherwise. At a loss. ANY SUGGESTIONS please.