Gonna be working on a '09 Highlander with 138k miles. Have all Toyota service records but can find nothing regarding ATF change. Wipers, tires, carbon cleaning (?), batteries, tires, brakes, etc all done at Toyota dealership. Owner's manual says to change at 60K only if you tow with it. I call it BS but it hasn't been part of my family.
I am gonna change the ATF and use Toyota WS. Thankfully, this car has a AT dipstick! How would you proceed to get new fluid in the transmission?
There are several options.
1. Can go and do a partial drain and fill 3 times and get about a 90% (5 out of 9.5 each drain and fill) new ATF level
2. Can remove "all" old ATF going through the cooler line process. I will not do a flush.
Also, gonna replace the Toyota ATF filter at some point. Would you replace it now in the beginning or run the new fluid for a while and then drop the pan and replace the filter? My thought process is the "new" fluid may do some cleaning and therefore it being best to leave the old filter in to catch this potential initial flood of gunk and debris.
In summary, which method would you change the fluid "knowing" it hasn't been changed in 138k and when would you change the filter?
I am gonna change the ATF and use Toyota WS. Thankfully, this car has a AT dipstick! How would you proceed to get new fluid in the transmission?
There are several options.
1. Can go and do a partial drain and fill 3 times and get about a 90% (5 out of 9.5 each drain and fill) new ATF level
2. Can remove "all" old ATF going through the cooler line process. I will not do a flush.
Also, gonna replace the Toyota ATF filter at some point. Would you replace it now in the beginning or run the new fluid for a while and then drop the pan and replace the filter? My thought process is the "new" fluid may do some cleaning and therefore it being best to leave the old filter in to catch this potential initial flood of gunk and debris.
In summary, which method would you change the fluid "knowing" it hasn't been changed in 138k and when would you change the filter?