I called 2 Lexus dealers about 2001 Lexus RX300 AT AWD. One told me that Transfer Case uses Type T-IV transmission fluid. One told me that Transfer Case uses GL-5 gear oil.

I called 3 Toyota dealers about 2001 Toyota Highlander AT AWD. Two of them told me that Transfer Case uses GL-5 gear oil. One of them told me that Transfer Case uses Type T-IV fluid.

I took my 2001 RX300 AT AWD to a Toyota dealer (which told me that Transfer Case should use GL-5 gear oil). When I picked up my vehicle, the service slip states

"Drained and filled both front and rear diff. fluids. 4 pints.
Transaxle and trans. has the same fluid"

Then I was charged 4 unit of gear oil, $1.50 each unit.
(If I am not wrong, 1 quart = 2 pints)

Note: My 2001 Lexus RX300 Owner's Manuals says that both Transfer Case and Differential use 1 quart of GL-5 gear oil.

I am so confused.