Dodge Durango

 Service Manual

Cooling System » Description and operation
Automatic transmission oil coolers

DESCRIPTION

CAUTION: On in-radiator type oil coolers, if transmission oil cooler is leaking, engine coolant may enter cooler, or transmission oil may enter engine cooling system. Both engine cooling system and transmission oil circuit should be drained, flushed, and inspected.

There are two types of transmission oil coolers used. One type of cooler is the in-radiator type or oil to coolant type. This type oil cooler is not serviceable.

The second type used is a remote type auxiliary oil cooler or oil to air cooler. The oil to air type cooler is located in front of the radiator, and is serviceable.

Fig. 11 Oil Flow to Cooler-Top View (Typical)

1 - TRANSMISSION OIL COOLER

2 - AUTOMATIC TRANSMISSION

3 - RETURN LINE

4 - PRESSURE LINE

Fig. 12 Auxiliary Transmission Oil Cooler-Typical

1 - RADIATOR

2 - A/C CONDENSER (IF EQUIPPED)

3 - TRANSMISSION AUXILIARY OIL COOLER

Cooling system

Coolant reserve/overflow system

Thermostat-5.2L/5.9L engines

Thermostat-4.7L engine

Radiator pressure cap

Radiator

Water pump

Water pump bypass-4.7L

Water pump bypass hose-5.2L/5.9L engines

Automatic transmission oil coolers

Automatic belt tensioner

Block heater

Hose clamps

Viscous fan drive