ATF flush: step-by-step

[robert213]

This procedure works great. I only needed 10 quarts of Valvoline Dexron III to complete the task. No need to disconnect any hoses. I drained, refilled, and ran thru gears only 3 times.

Reminder... Make sure jack stands raise front wheels at least 2 inches off of ground. Apply brakes between shifts between reverse, drive, and park.

I purchased impact 6-point 24mm socket at NAPA. I already have a 4 inch extension. Don't forget to purchase new aluminum crush washer for drain plug. You cannot use crush washer for oil plug. The crush washer for auto trans plug is much thicker.

https://www.matthewsvolvosite.com/tips.php#transflush2

ATF flush: step-by-step
cn

1. RE: "ATF is not a service item", the owner manual says "no need to flush the ATF" for normal service, but considering that it is a very expensive item to repair and with my modified technique it is very easy to flush (easier than doing engine oil change).

2. Here is my technique-modified from Haynes. No need to remove the battery and battery tray and no need to disconnect the hose from the cooler. Get a box wrench 24-mm (Sears). The drain plug for the ATF is on the Right side of the Transmission casing. Drain ATF, you should get approx. 3.5 liters out the first time. This is the amount you need to put back during the final top-up.

However, for the each flush cycle: a. Reinstall the drain plug finger-tight b. Add just 2 liters of ATF c. Start the engine (don't drive as the drain plug is not tightened), shift through all gears with at least 5 seconds in each gear. d. Drain the ATF

Repeat the above steps until the ATF is clear, it usually takes 3-4 cycles or approx. 8 liters of ATf to be wasted. At the final topup, add approx. 3 liters, run the engine and check the ATF (using standard procedure as in the onwer manual as to how to check the ATF level). In my experience during the final run I added 3.5 liters. This way you only need one case of 12 liters of ATF. I think this is good preventive maintenance.

[MadeInJapan]

I agree...good preventative maitenance and best for those who are in "doubt" about the full flush method due to fear or high miles. I think this is the best least intrusive way of flushing the tranny! Nice write-up Robert!