Rear and front differential fluid change

I have 2018 Tundra and right now I have around 17,000 miles on it. I have never done rear and front differential fluid change. I am researching online and checking owners manual but I am still not sure when I need to do it. It’s saying it depends on your driving conditions like if you go for off roading or tow heavy stuff. I am not doing any of that. Can anyone let me know if anyone know when you should do it?

 

2017 CM - mines at 60K and i wasnt planning on it for a little while longer

 

So changed it first time at 60k?

 

30k is what's recommended by Toyota I think, at least that's what my mechanics said given normal driving conditions.

 

No , still havent done it. I suppose I should though...

 

That’s what I am thinking too in owners manual they just mention to check it at 15k 20k 25k service

 

You should definitely lol it must be your atleast second service around this mileage lol

 

Changed the rear diff fluid on my 2016 4Runner tonight with 30,000 miles and the magnetic drain plug had metal shavings packed onto the magnet, there was no more real estate. Because of this I am going to change the rear diff fluid on my 2019 Tundra at 10,000 miles the first time and then every 30,000 miles after this.

 

I do my diffs every 25-30k on my 09. That’s every 3-4 years for me. I am nearing 90k with no factory fluids still in the truck except coolant. I do them all early and at staggered intervals to get more life out of everything and so I’m not due for one big expensive service at 100k. Will probably do coolant end of this year. Then just oil changes for a couple years until I get around to plugs. May go to 50k on most things now that the break in oil is out of everything.

 

Planning to do diffs/transfer case at 30, but probably run 50k intervals after the initial change since I'll use a better quality fluid

 

I bought my tundra at 220k miles and did the rear diff and transfer case. I tried to do the front diff but could not get my hex head to lock into place and did not want to strip the fill bolt.