Ok everyone, getting ready to change the transfer case fluid in my 17 4Runner and im sure you have all heard that toyota specs the LF 75w which 99% of all dealers carry and is like $90 per bottle. There are a few recommendations of people using Ravenol 75w or a lot of guys using 75w90 synth gear oil. My only concern was using a gl5 in the transfer case and by what i know gl5 is not yellow metal safe. So i was talking to my BG rep who gave me a few qts of BG Syncroshift II which is a fully synthetic GL4 75w80. i was just curious to know if anyone else has ever used this fluid with good results as i wanted to get some opinions.