Transmission & Drivetrain for Jaguar S-Type "adjusting band brakes" Questions

why did my automatic transmission stop shifting? my automatic transmission stop shifting when i put it in drive. This is a vague questions without stating the year/make/model. There are several things

how are you fellow Jaguar enthuseist, I have an issue with my transmision in my 1995 Jaguar xj vanden plas when driving it is shifting hard especially when braking(when trans is down shifting) it shif