Gear oil, transfer case oil intervals?

Brand new 2023 Tacoma sr5 v6 4x4. Did my break in oil change at 1k miles with amsoil signature series, but wondering at what interval mileage are you guys replacing your diff oil, transfer case and trans fluid? Just curious for future reference. Plan on having this Tacoma for very long time. Thank you

 

Think the manual says 30k miles. Make sure to have the replacement crush washers on hand. Some don't replace them but they're cheap and you're already underneath so you might as well put on new ones.

When you do change it TAKE THE FILL OFF BEFORE THE DRAIN! If you take off the drain and the fill won't come off you're gonna have a bad time!

Super simple change. Fill it till it comes out then torque the plugs to spec

 

Thanks dude!

 

Adding to what @Squirt pointed out......

If it's a easy driven highway princess, the owners manual is fine to follow.

If you work it off road regularly, tow or hoon on road, cutting the intervals in half is reasonable.

If you beat it like a rented mule off road, fording streams, towing heavy, the switch to a synthetic product and still having the intervals in half is a nice treat for the truck.

Side bar. All modern lubricant's are very good. Far, far superior to lubricants of just a couple decades ago. There's no reason to spend extra $ on boutique lubricants. Just use the correct weight and GL rating and all will be well.

 

what I do is get a cheaper truck then I buy cheap fluids and change them

the most often probably 30k

depends if there’s suspicion or not
Like hard use, water crossings, etc

doesn’t hurt to do.

 

I personally would change the case and diffs out at 10 000 miles to get the break in oil out and put in an exotic high performance synthetic and forget about it for 100 000 miles. If you are driving through water often just get the cheap diff oil and change it out every 10 000. Just my opinion.

 

gear companies share publicly charts on gear oil diff break in procedure.

 

Thanks fellas

 

15 K is a good time frame . The gear oil in the diffs will be dark and pretty dirty. I’m at 30 k on second round , I did amsoil severe gear both times . Much cleaner this time . Transfer case I did on this round ,and I used the Toyota transfer case oil. It want very dirty at all. Everything is fresh now, and honestly very quiet . I have grease fittings on the front shaft that I keep greased

 

Why Toyota oil in the transfer case and not amsoil?

 

As a general rule, OEM is always the correct fluid for your vehicle. Toyota designs, tests, builds, and certifies the truck to work with their recommended fluids. No reason to go otherwise. I know for a fact that I'm not smarter than a bunch of Japanese engineers, so I do what they specify.

Also, Amsoil is an MLM like Herbalife, Doterra, Tupperware, Amway, etc.

 

While you drive a Toyota lol

And in 1972 we were strong allies with Japan. I'm not quite sure what you're getting at?

API is an interest group. It's like me saying my tap water is the first household tap water officially recognized by the American Water Institute of kairo. Special interest groups are just lobbying, money, and politics. There's no officially mandated standards for any manufacturer set by the API (to the best of my knowledge). They're big enough that a lot of companies adopt their standards, but they're by no means a regulatory agency.

 

Joined 7 years, almost to the day, and the first message is promoting Amsoil lol

 

This thread has potential. Happy Friday!

 

In terms of when to change the fluids, I refer to this. Good diagram that is easy to follow.
https://www.tacomaworld.com/threads/3rd-gen-maintenance-maps-get-300k-miles.789809/

 

Because the transfer case has brass in it and the Toyota gear oil is specifically for that so the brass does not corrode over time . The only other brand you could or should use for the transfer case is Ravenol
The oil in the front and rear diff is standard stuff . I just like amsoil gear oil . I ran it in my frontier for 255 k miles and it is good stuff .

 

It looks like Toyota only sells gear oil and transfer case oil in quart cans. Not a very user friendly can to pour the oil into the transfer case or diffs.

 

OEM fluids come in OEM packaging. It's generally assumed that you'll own the $1.25 funnel when you're doing maintenance.

 

A hand held pump would work better for that

 

Correct it not very user friendly unfortunately. I have a manual pump and just poured it into a plastic oil bottle ( clean of course ) and then pumped it in. And for what it’s worth I’m not promoting Amsoil . Mobil and plenty of other companies make gear oil . I just like using synthetic in the front and rear diff .