I would like to change my transaxle and transfer case lubricants this weekend and I would like to know what the difference between GL4 (Transmission) and GL5 (Transfer) is....I have bought Mobil 1 synthetic gear oil...this says it is a multigrade 75-90w and it exeeds GL5 specifications.....I want to know if this would be sufficient for the lubricant in the transaxle as the manual calls for GL4 75-90w oil...does anyone know the answer?
Thanks in advance

 

I used it in both.

 

I also used Mobile 1 75-90w GL5 fluid in my transaxle. I've got about 600 miles on the transaxle fluid change and things seem fine.

 

Thanks for the help