Vehicle transmissions have intricate moving parts that need proper lubrication at all times. Transmission fluid, like Dexron Type II and Type III, exists to keep the transmission in good working order.
Transmission fluids are designed to withstand heat and friction over a long period of time. Dexron Type II and Type III are both transmission fluids for an automatic assembly, originally designed for General Motors vehicles.
Dexron Type II improved upon the original formula, with more control over its thickness as well as more additives to control oxidation. Before Dexron Type III was developed, type IIE was formed for electronic transmissions. Subsequently, Dexron III was introduced as a replacement for Type IIE. Corrosion and oxidation inhibitors were formulated and combined to make an improved Dexron III, specifically made for electronic transmissions.
Though transmission fluid does not need to be changed nearly as often as engine oil, it is important to check the color and consistency between servicing cycles, or about once a month, to verify that the transmission is being properly lubricated. This will help prevent major breakdowns.
