Changing transmission fluid

toyota
rav4

#1

Is it useless to change the transmission fluid without cleaning out the torque converter first or at the same time?

Thanks!


#2

No, its not useless.

BC.


#3

If you are changing the fluid on a regular basis like every 25 - 35,000 miles, You are doing your transmission good. Not changing it at all is bad. Changing the rest of the fluid is good, but generally not needed.


#4

If the transmission fluid is changed on a regular basis then dropping the pan, changing the filter and adding the proper amount of fluid is all that’s needed. The interval should be specified in your mom’s owners manual.


#5

Whatever it says in the owners manual it is probably clearly screwy and you should ignore it. Have a local transmission shop drop the pan & change the filter every 3yr/30K miles. If this car has gone a really long time without a fluid change then have the pan dropped, filter changed, and then have a full fluid exchange done. Then just pick up the 30K miles filter change intervals.


#6

Thanks!