Did you ever have transmission failure because you never changed the ATF? mileage?

[LC neophyte]

Yes 300k.

They look new because I care for them. They’re coated annually with fluid/woolwax. I am original owner on all of them.

AK doesnt use salt, uses no ethanol in gasoline and has no income or state sales tax.

BTW, with no ethanol, do you notice a difference in fuel economy?

 

[04UZJ100]

BTW, with no ethanol, do you notice a difference in fuel economy?

Yes. 10%. Definitely noticeable. Stupid government and their idiotic policies.

 

[Artie]

Preach.

 

[1989toy4wd]

At 78K, did you connect to a fluid exchange machine to fully change? What did the fluid look like? Just curious, because you tow frequently. Also, did you do a new fliter?

No I did the 3qt at a time cooler line method. It was kinda dark but not bad. I bought the truck at 72k and don’t know how it was driven before!

 

[linuxgod]

I know lots of folks see dark fluid and think it's old and worn, but if it's never been changed I'm not entirely sure that's true. I know at least in the case of gears they have a phosphorous coating which will come off during the break-in period which makes the fluid turn dark. That doesn't harm the fluid, but after a few hundred miles it will make the fluid a darker color. I don't know if transmissions are the same but I would not be surprised if the gears are also coated.

 

[rlynch356]

this got me curious ... Toyota calls for ATF Replacement in some cases @ 60k and there after every 60k from what I can find. Heavy Vehicle loading would encompass a lot of the trucks here.
I did mine just as part of what I consider prudent maintenance on the truck.. I also do the diffs and transfer case every 50k. The diffs I'll probably switch over to yearly since I am nearing 100k miles.

 

[linuxgod]

this got me curious ... Toyota calls for ATF Replacement in some cases @ 60k and there after every 60k from what I can find. Heavy Vehicle loading would encompass a lot of the trucks here.
I did mine just as part of what I consider prudent maintenance on the truck.. I also do the diffs and transfer case every 50k. The diffs I'll probably switch over to yearly since I am nearing 100k miles.

View attachment 3039670

Correct. Replacement in that case though means draining and re-filling the pan, which is about 1/4 the total fluid

 

[rlynch356]

It was for 10 Liters, so a full flush from the looks of it. They did say they use an extractor on it.
I thought it was quite reasonable considering the PITA it is to DIY.

 

[linuxgod]

That's similar to what my local dealer charges for the same service. They marked 12 quarts on my invoice, but similar service to replace the fluid using "the machine".