How frequently does the automatic transmission fluid need to be changed?

[sansag13]

Originally Posted by CTScott

The AT cooling hoses are the two small (~1/2" in diameter) hoses that both go into the bottom of the radiator (as opposed to the pair of 2 1/2" or so diameter ones for the coolant.

You can loosen the pipe clamps that connect the rubber hoses to the metal pipes and simply drain both sides. No suction is required, and you definitely should not run the transmission to pump it out.

Hi Scott,

I have got 7 quarts of ATF WS from toyota this weekend. However when I went below the car to open the ATF plug, I could not figure out which kind of tool I should use to open it. Looks like it requires big hex key (bigger than 5/14"). I tried to look for that kind of hex key in local wall mart and home depot but couldn't find one. I would appreciate if you let me know which kind of hex key you used and from where can i get it.