Gear oil MOTUL or AMSOIL

I was trying to choose between redline and Amsoil redline had an exact match for my 2015 OEM weight. Amsoil ships from near me in Wichita Kansas so I chose Amsoil the severe gear 75W 90 and did the differential and transfer case. No issues so far

i love my amsoil 80w90(though i am NOT an amsoil fan boy), been great for 4 years, cross country,bleow freezing(and run hard for hours in it) and in tropical climate and flogged. in a BT car at that

Why I am writing a review about this gear oil, because since I owned this car shifting into second gear on cold morning has been a little bit hard. And last week when I went to my mechanic for an oil change as usual he used full synt Motul oil 5w40 and he suggest me to use motylgear 75w90 gear oil. REVIEW... Before: when it's below 10C outside or on the morning for the first 5 or 10 minutes it's hard to shift in second gear. Most of the time I try to rev match or shift in third skipping second gear. Even after 10 minutes sometime I get a nice grind in second gear. Now: Yesterday it was about 2C in the morning and the improvement is about 60% better and only after 2 minutes it was shifting like butter. Everything seems to be a lot more smoother and safer. I don't feel like I am going to break something when I shift in second gear, to be honest I am very surprised and happy.