DTE 26 & MG 600 XP both have EP/anti wear additives. However, it is not too often you see a gearbox in the industry that has a AGMA of 2 (68 Vg), must be a very light load application. Unsure if you are switching fluids in the gearbox from Syn to MO or not. If so adequate purge is required and be attentive of seal leakage.