TUDETIC - HD 80W90 1L transmission oil kit (3x). At Tudetic we offer you this HD 80W90 1L transmission oil kit at the best possible price. It is composed of 3 units of lubricating oil for mechanical transmissions, synchronized or non-synchronized gearboxes, differentials and transmission boxes. Recommended for noisy and/or stressed gearboxes that require compliance with API GL-4/GL-5 and MIL-L-2105D standards.