1978 Suskia Sammuria Transfer Case Gear Lube Weight 0 Members and ane Guest are viewing this topic. Gear oil for Trans,transfer example and differentials. Wednesday, January 11, 2006, x:00 PM Thinking about using Lucas 75/90 synthetic and run into if information technology reduces the gear racket. Think it will work or am I wasting money? Re: Gear oil for Trans,transfer case and differentials. Reply #1 – W