I'm honestly unsure which tcase I have, let me do some more research, this is a random diagram I pulled from the internet

 

Random diagram?? Maybe. But the images of the bottom of your truck seem to indicate the same.

Find out what you've really got here:: Toyota parts catalog (epc-data.com)

 

Appreciate the info, here is the correct diagram. How can you tell whether or not its gear or chain?

https://toyota.epc-data.com/hilux/ln.../chassis/3609/

 

Here is an associated parts description for your truck type:: Chain drive, it is::Transfer gear for Toyota Hilux LN130G - Auto parts (epc-data.com)

 

Appreciate the info, I've only learned mechanics on my vehicle, and have not yet delved into the transfercase.

These seals seem out of stock on the normal part websites i use, so ill get a quote from my local dealer but im expecting it to be $50 per seal. Ill replace them and report back. Thanks for the help.