Question about service work

Okay, I have a 2 part question for you guys:

1 - Do I do the oil change on the diffs and transfer case? I have a 2014 with about 36,000k and I tow a 4000lb travel trailer approx. 2k miles a year. Don't do any offroading.

2 - If I should do ^^^, then do I do it myself or allow dealer to do it at $359 (front & rear diff and transfer case)?

Thanks.

 

I believe the service interval is every 30k miles. That is what I change my Differential and transfer case fluids at.

I would do it myself. I did it myself for around $100 and 4 hours of my time.

Here is a DIY I wrote up for the Transfer case and Front differential:

https://www.tundras.com/threads/diy-front-differential-and-transfer-case-fluid-change.10743/

 

Do it yourself. It is easy. I would not bother with transfer case. I did Tacoma at 50 and fluid looked new. Always did diffs at 30. When I did them at 90 the fluid looked much cleaner than the first 2 changes.

 

If you have a place to do the work, do it yourself. Not too hard. A little time, some hand tools and a $5 pump.