Just picked up an iX. Haven't had time to find a manual that covers the iX (Bentley doesn't) and was looking for advice on WHICH Redline synthetic fluids to use for the 2 Differentials (front and rear use the same type of fluid or different?), as well as for the manual transmission fluid. I've used D4-ATF for the manual fluid before in my other car, but was wondering if this would work in the iX tranny. Any suggestions would be appreciated. Thanks!