At the side of the transmission on AWD.
Either the sensor is bad or the shift motor in/on the transfer case is not working for some reason (failed, blown fuse. etc.)
how do you check the oil for the front transfer case on a 1990 Toyota four runner
Yes.
Damaged gears in the transfer case.
NO way. Not even close.
Autotrader.com and edmunds.com are two good websites to start off at. Input the type of car you are wanting to compare (in this case a Toyota Rav4) and the information is accesible right away.
You may need to check your transfer case
Yes, 90 weight oil is recommended.
you have to remove the transmission, the driveline (S) depending if its a 4x4, if so u have to remove the transfer case. the transmission and transfer case should be the last step. your clutch sits right behind your tranny.
the fill plug is on the back of the case a bit more than half way up and left of the center line
Yes - just put the transfer case in neutral.
Only that motor will fit unless you change out the transmission & transfer case. They are different on 4 cyl & 6 cyl