Should i change transmission oil?

[The Limo 2]

Under normal service, Toyota USA says to check your transmission fluid at 100,000 miles and then every 50,000 miles after that and not to change it unless there is something wrong with the fluid. They treat it as a lifetime fluid.
As you can see in my post #3 above this is different than Toyota Canada.
Roy

[lenzomaru]

Originally Posted by The Limo 2

Under normal service, Toyota USA says to check your transmission fluid at 100,000 miles and then every 50,000 miles after that and not to change it unless there is something wrong with the fluid. They treat it as a lifetime fluid.
As you can see in my post #3 above this is different than Toyota Canada.
Roy

My manual says that as well..check at 100,000 and inspect every 50,000..but how will you know something is wrong with it?