Tundra now uses ATF in transfer case

[meep]

And, what I assume to be vacuum hubs. I actually don't know off the top of my head, but I do know that the CV joints don't spin when not engaged.

In the fords, they exercise daily because vacuum pulls to disengage. They let go and engage while the vehicle is off (or such as when your 10r80 just croaked mid-shift and dropped to neutral and you cut power to kill and restart the ignition while still rolling, which is how i discovered this). That’s nice to know that if the line is ruptured, they default to locked. Idk about the tundra.

 

[ctechbob]

In the fords, they exercise daily because vacuum pulls to disengage. They let go and engage while the vehicle is off (or such as when your 10r80 just croaked mid-shift and dropped to neutral and you cut power to kill and restart the ignition while still rolling, which is how i discovered this). That’s nice to know that if the line is ruptured, they default to locked. Idk about the tundra.

I wonder though. I need to take a good look under my hood. I actually don't know if there is a vacuum system in the Powerboost come to think of it. I haven't given much thought to it, but I'll bet that the brakes are electrically modulated, which would mean no vacuum there, leaving the hubs as the only thing that would need it.

 

[Snagglefoot]

GM has used ATF in their tranfer cases for 40+years with success. The new Tundra must have a pump that supplies oil rather than slinging it around.

Yes, 30000 would be fine I am sure.....it is done all the time again, by GM owners, where the older drivetrains commonly held 250k without issue. Recently I stopped using Maxlife ATF and switched to Mobil Multi Vehicle which meets the WS spec. Is viscosity is 6.4 rather than Maxlifes 5.9.......does it matter, my LX570 transmission seems to have liked the increase in viscosity, or so it feels.

Why not just ask it?

 

[nthach]

Is it still a BorgWarner t-case? That’s what I’ve seen on a friend’s 2017 and 2018. Toyota does make their own - either JTEKT or Aisin, and those called for GL-4 75W oil.

 

[nascarnation]

A t-case looks a lot like an automatic transmission - gears, shafts, bearings, clutch plates (sometimes).
They typically don't have hypoid gears that require an ep lube.
So that's why atf works well there.

 

[panthermike]

I'm aware of the issues with this engine. I'm at 5000+ miles now. I did a change at 1000 and 5000. I'll do every 5000 now...thanks.

They're a bit overblown, as are most things on the internet. I believe the failure rate is reported as quite low. Still, Toyota should and I hope have, addressed this.

 

[D60]

I think the last GM gear oil unit was the 205, 40+ years ago. But my LX570=gear oil, weird.

I recently read on one of the GM forums that late model 205s were spec'd with ATF. The comment went on to say that anecdotally those run on ATF didn't last as long -- not surprisingly, but it's important to note that of course the old cast iron NPs were way different in design than later alloy t-cases.

For the OP, he may lack a bit of perspective. As mentioned, Ford, GM and Jeep have been running ATF in their cases since ~1980 (1980 was literally the first year of NP208 for Ford, which was an alloy case with a chain, making for a dramatic departure from all-gear-driven NP205 and NP203 -- the latter having a cumbersome differential bolted on like an afterthought to allow for true AWD)

 

[burbguy82]

I recently read on one of the GM forums that late model 205s were spec'd with ATF. The comment went on to say that anecdotally those run on ATF didn't last as long -- not surprisingly, but it's important to note that of course the old cast iron NPs were way different in design than later alloy t-cases.

For the OP, he may lack a bit of perspective. As mentioned, Ford, GM and Jeep have been running ATF in their cases since ~1980 (1980 was literally the first year of NP208 for Ford, which was an alloy case with a chain, making for a dramatic departure from all-gear-driven NP205 and NP203 -- the latter having a cumbersome differential bolted on like an afterthought to allow for true AWD)

My 1986 K30 has the NP208, and uses ATF

 

[D60]

So yeah, I did a further deep dive and apparently GM really did spec ATF in the later NP205, particularly the synchro'd versions that came in auto hub trucks -- and apparently auto hubs (puke!) were an option even in K30s, albeit rare.

If anyone cares, you can just search the webs de inter.

Again, as for the topic: if an all-gear dinosaur like an NP205 can survive on ATF, any t-case can. I actually like everything about the NP205 except the dismal low range reduction