If you have a automatic transmission you need never change it as it is factory sealed for life. One less job to do. Peter
When its old
You should not have to unless you have a leak
100,000Km
You should change your automatic transmission fluid in Toyota gearbox at least after every 30,000 miles.
Transmission fluid (Civic CVT manual every 50,000mls,Transmission fluid (A/T or ?/T) auto every 30,000mls
Unless you have a LEAK you shouldn't have to add automatic transmission fluid on a regular basis
How often should the transmission be drained on a 2005 kia sendoa lx?
Recommended at every 25,000 miles
60.000
Usually you should change your transmission fluid after 60,000 miles, but to be safe you should check it after 30,000 miles and if it looks like it is low I would add some fluid.
If it is an automatic transmission every 30 thousand miles.
You should change your transmission fluid between 125000 km to 150000 km with the filter for an automatic . and the same for a standard without the filter . because there is no filter required for a standard transmission .