Thanks @GTSSportCoupe
Flush procedure will be much appreciated.
Ended up adding another 1.3L of ATF today after a 45 min drive and engine running to get it to the "hot" reading.
My "cold" reading in the morning is just below the "hot" mark, were prior to filling it up today, my "hot" reading...
I have a question regarding the method used for checking the transmission oil level in a LJ78.
Is this done with the engine hot and running or engine off and hot?
Keen to get your thoughts on this as I am getting inconsistent readings after I swapped the transfer case.