Oil levels

Hi to everyone,I have a 2012 Toyota Tacoma 4x4 5 spd auto trans,4.0 engine.I want to check both differentials and transfer case to see how much oil it may need.When you take the fill plug out how do you know if you need to add any fluid or not.My owners manual does not say how to check,but it does say how much it holds. Thanks to all that help me.

 

afaik

take fill plug out stick finger in
oil should be right up to bottom of fill plug

if it is warm it may even dribble out a bit

 

This. Should be just about ready to come out the fill plug hole or dribbling out a little.