Warmer operating temperature: Tied in with spin losses, the 6R140 cooling system has been optimized to allow for the proper amount of cooling when towing heavy loads in high ambient temperatures, while running at an overall higher stabilized temperature. This higher stabilized temperature lowers the viscosity and helps the fluid flow more easily, which reduces parasitic losses and saves fuel. The fluid also warms up faster because it does not flow to the cooling circuit until properly warmed up. Faster warm-up also reduces overall parasitic losses.
– Customer fuel economy benefit: Fewer parasitic losses due to reduced fluid viscosity translates to less internal drag on the system and increases fuel economy.