According to\many websites you should change it every 30,000 miles. But if you have Dexron III ATF which is supposed to be good for 100,000 miles. You can also change it if you just want to.
Every 50,000 miles.
Ford recommends changing your transmission fluid every 30,000 miles
What type of trans oil does and how many lts
100K miles transmission oil flush & change.
I change my engine oil and filter every 3K, transmission fluid and filter every 35K and rotate the tires every third oil change (9K).
How do you change ML55 transmission oil?
EVERY 30000 MILES
Some require no maintenance at all. I would recommend changing it when the clutch is replaced.
The transmission oil is the engine oil it also has a liquid clutch (same oil). If you have a drive shaft you should change it's oil as well but with gear oil. hope this helps
You should change your oil every 3,000 miles. If you drive your car rough, then you should change it more often.
The average motorist should change the oil every 3000 miles. Oil should be changed more often if driven in dusty condition.
Change the oil filter every time you change the oil.