2018 CM 4wd Trans fluid change?

At what mileage are you guys flushing and changing the trans fluid?
Thank you

 

Drain and fill every 30k. Don't bother with a flush

 

X2

 

I did a flush because I bought mine at 100k miles and wasn't sure when/if the previous owner ever did drain-and-fills. I will be doing drain-and-fills from now on, though.

 

60K

 

What fluid is everyone using?

 

Toyota ATF WS

 

Whatever has the most signatures on the bottle.

 

I bought my '18 at 23k miles last November. I'm just about to hit 35k miles on it.
I'll probably start looking into doing a drain n fill on my transmission soon. Gotta start collecting the items needed.

What does the "flush" consist of vs. drain n fill?

 

Flush would remove all or nearly all of the fluid and involve a machine that you won't have in your garage.

Simply drain the pan, and refill what comes out, or there's a common practice of adding about an extra half quart over what drained out and then doing a fluid level check procedure outlined in this video:

https://youtu.be/NUAuGmDGntY?si=MNxm2Fp9O2jQtgeQ

I'd suggest just sticking with the drain and fill method and doing so approximately every 30k miles or so

 

What ever WS compatible synthetic is on sale.

 

30k miles and WS ATF - either Toyota or Aisin, but mostly Toyota WS straight from the dealership. At 212k miles, it's still holding up great with lots of towing and hauling. I did an ATF oil analysis with Blackstone Labs last year and they suggested I move up to about 24k mile intervals, with an extra changes with every engine oil change over the next year. As noted, I do a lot of towing and hauling so I have no qualms with the recommendation for additional drain and fills at this mileage.

 

The only signature I look for on everything from oil to ketchup.