For some reason it seems that transmission service has become almost a thing of the past. Not that it should have, Mechanics make lost of money every year replacing transmissions that only failed because they were not serviced or serviced too late.
I suspect one of the primary problems is the old story. Most drivers wait until the transmission shows problems before they change the fluid. By then it is too late, but rather than blaming themselves for waiting too long, they blame the transmission.
Most drivers would find that their transmission will last a lot longer than they suspect IF they would change the fluid every 30 or 40,000 miles.
Yet time and time again, drivers hear about the transmission that failed right after the fluid was changed they don't get the fluid changed. Later when they start noticing the smell or function of the transmission, then they finally get it changed, only to have it fail shortly after so the same story is passed down again and again.
The owners who changed their fluid are not leaving messages here because they don't have a problem.