PRIMARY POWERTRAIN CONTINUED
Oil Cooler (Powertrain)
The powertrain oil cooler (Figure 5, Item 1) is mounted vertically on the right side of the engine and is a water to oil
type cooler. The oil cooler uses the coolant from the engine cooling system to cool the oil.
The engine coolant enters the oil cooler at the inlet (Figure 5, Item 3) of the oil cooler and flows through the tubes
in the cooler. The coolant then flows out of the oil cooler through the outlet passage (Figure 5, Item 2) of the oil
cooler where it is cooled by the engine cooling system.
High temperature powertrain oil enters the cooler from the torque converter outlet relief valve. This oil enters the oil
cooler at inlet (Figure 5, Item 4) at the bottom of the oil cooler and flows along the tubes in the oil cooler. The
powertrain oil exits through the outlet passage (Figure 5, Item 5) at the top of the oil cooler and has a cooler
temperature. The cooled oil then flows to the lubrication distribution manifold, which divides the flow between the
transmission and brakes for lubrication and cooling.
Figure 5. Powertrain Oil Cooler.