Valvoline 75W-140 SynPower Full Synthetic Gear Oil - 1qt (Case of 12) (VV982-12PK) Contains additives to assist in protecting gear teeth Maintains excellent low temperature fluid protection down to -50F (-46C) Provides outstanding thermal stability for cleanliness and longer service life Contains special additives to reduce chattering in limited-slip differentials Recommended for (conventional and limited slip) manual transmissions where an API GL-5 or MT-1 fluid is specified