Ok, then go ahead and use it. I've used a lot of Redline products, as I can get it for nearly free, and they are generally very good lubricants.
FWIW, I've used Mobil 1 75w90 GL-5, Redline 75w90 GL-5, Redline MT90 GL-4, and a couple other synthetic gear oils in my 4Runner's VF2A transfer case. They all did a fine job, and over 19 years after I bought the 4Runner new off the lot, it still runs like new.