1qaz

I have been reading up on Error Code p0763 and understand that that is a solenoid #3 problem. The post I read referenced a 98 GS300. I have a 98 GS400 and have a few questions: Was more than one transmission available with my model? If so, where do I look to find out which transmission I have. Lastly, do you have to drop the pan to replace to replace the solenoid #3? Thank you, to everyone