I have seen many posts about ATF fluid changes but am failing to find what I am looking for. I picked up Mobil 1 75W90 for the differentials but could not find the 75W90 GL-4 oil for the transfer case. One of the knowledgeable employees at Kragen said the Mobil 1 75W90 GL-5 stuff I picked up for the differentials is the same stuff I use for the transfer case. Now, I am no expert and do not claim to be, however, I assumed he was wrong. I am having an impossible time finding the 75W90 GL-4 oil needed and want to have it by Friday so it’s changed before goneMOAB. Does anyone have any suggestions or answers to what they used or what they know works? Please?

Thanks!