OK, pull out your pencils- it’s math time. The average transmission should be flushed every 30,000 miles. (check your owner’s manual for your particular vehicle) (If you cannot find your manual many are online).
Let’s say that your car lasts to 120,000 miles. If you have maintained your vehicle you should have performed four transmission flushes at a cost of approximately $260 each for a total of $1,040. Still with me? The total cost of a new transmission is at least $2,900 installed. Now take the difference between the cost of your maintenance and the cost of buying a new transmission and you get $1,860.