I have a 2006 Lexus GS300 and I have transmission problems I had shift solenoid c and b codes I ordered the whole set for my transmission changed all shift solenoids drove the vehicle to test on the way back transmission shuttered and now in park vehicle wants to go forward in neutral I have Drive In Reverse I have nothing as if it's in limp mode still have Drive normally but gets up and gets up to speed but I don't have reverse please help would I have to reset the TCM please let me know

 

It sounds like the Range Sensor/Neutral Safety Switch is not properly indexed. I would look up the procedure for that on this transmission and index it.

This is a sensor on the outside of the trans, surrounding the shift selector, that tells the PCM what gear you have selected. You do not need to open the transmission to adjust/index it.