I have been reading and hearing about transmission rebuilding or replacement. Today a person was asking if they should sell their car or keep repairing it (it had a transmission problem). Notice that most of the times that I hear about transmission rebuilding or replacement was from someone in USA and mechanics asking 2k-3k $.
Nevertheless, one of the answers said that a transmission should be able to handle 30k miles (~50k km) with no problems.
Thus my question would be if this is a normal thing to change atleast once the transmission of a car. Does it make a difference if the car is manual or automatic?
My parents's cars are manual and have not even once changed transmission for more than 180k km or even 300k km.