<p>The article is devoted to the synthesis of a number of trithiocarbonate esters obtained from sodium trithiocarbonates and organohalogen compounds, followed by a study of their functional properties with the aim of developing transmission oils based on them. The composition and structure of the synthesized compounds were confirmed through elemental analysis, physicochemical properties, and NMR spectroscopy. The functional properties studied included extreme pressure, anti-wear, antioxidant, and anticorrosive properties, which are among the key requirements for transmission oils. Samples were prepared using MS-20 aviation oil, which can also be used to make transmission oils. To determine the effect of sulfur content on the extreme pressure and anti-wear properties of the compounds, several xanthic acid esters were also tested for comparison. Studies of the functional properties of the compounds revealed that bis(butoxycarbonylmethyl)trithiocarbonate was the most suitable, both in terms of compound synthesis and the results obtained for tribological, antioxidant and anticorrosive properties. A prototype transmission oil was produced using this compound, the characteristics of which are presented in this paper in comparison with those of the commercial TAD-17I transmission oil. Unlike existing work in this area, a transmission oil based on trithiocarbonate ester was developed.</p>