I have a 2016 Ram 1500 EcoDiesel. With the 3.92 limited slip rear end. It's time for its first differential oil change. The rear is 75/140 and the front is 75/90. Trying to figure out if I should go with redline as I have in the past with other vehicles. Or try motul. Haven't been able to find much info on the motul gear oils, but both are available locally and are close to the same price. Does anyone have any experience with the motul oils?