Never heard of the gear oil before. Triax Synergy Gear Max 75W90 GL-5 Limited Slip Ultra Long Drain.... They have it on Amazon for $39.56 with free shipping with Amazon Prime member. Was wondering what the feedback from BITOG members is on this Gear Oil. IF your feed back is positive -- gonna pull the trigger on it for 2 gallon jugs for the new to me Tundra just purchased in signature.