Replaced my ATF

[markitect]

Last weekend I replaced the Automatic Transmission Fluid in my 2009 Yaris. I know it is supposed to last the life of my car, but I replaced it at 64k miles, and I'm glad I did.

Symptoms:

1. When sitting in drive, with break pressed in traffic, the car would shake and make a pattering noise(switching to neutral stopped the shake).
2. Occasional long shift into 4th gear.
3. Fluid dropped from stick onto paper towel looked smokey(did not smell bad).

Cause:

Probably something to do with HPDEs and Autocross(constant redlining

Parts:

1. 8qt of Toyota WS ATF
2. Wix filter/gasket kit.

Tools:

1. 10mm allen wrench
2. ATF fluid funnel
3. Oil change pan, with a LARGE opening.
4. metric socket(forget the size, maybe 10mm)

Procedure

1. Run through all the gears while stationary a few times
2. Drive the Crap out of it for 10 min, inluding flooring it on the highway to get to speed, and randomly hitting the gas until it downshifts at speed.(Obey the speed limit)
3. Run through the gears while stationary again
4. Find the Drain Plug, it's 10mm allen plug on the driver's side near the wheel
5. Line up the pan
6. Open the drain, and expect HOT fluid all over your hand/wrench.
7. Let it Drain for 10min
8. Tighten the plug back down
9. Add about 2.3 qt of fluid, and check the level adding more as needed.
10. Repeat Steps 1-9(now you've used 4.6 qt of fluid)
11. Repeat Steps 1-6
12. Let it sit for 30min to cool off while dripping
13. Put the drain plug back in and tighten it up, and remove your drain pan.
14. Put some newspaper down under the pan
15. Use a socket to remove all the bolts around the pan(you will need to flex the plastic undertray a bit.
16. The pan will come off, move it to more newspaper(yes you can see wires and gizmos inside your transmission)
17. Now remove 3 bolts from the filter, and discard it.
18. Put the o-ring on the new filter and install it, with the 3 bolts(the transmission will probably still be dripping)
19. Clean the Pan, including the 2 magnets with paper towel.
20. Reinstall the pan with the new gasket supplied, you might want to use some adhesive to temporarily hold the gasket on.
21. Don't over tighten the pan bolts.
22. Wipe everything down so you can watch for leaks
23. Add 3 Qt of ATF Fluid(You've now used up 7.6 Qts, and have some to spare to top off).
24. Check the level and add more until it is full(I waited for the car to cool off overnight and used the cool markings on the dip stick)
25. Make sure no fluid had leaked out.

Results:
No more shaking, and it shifts like a dream