Durango 4WD V8-5.9L VIN Z (1998)
Transmission Cooler: Description and Operation
Oil Flow To Cooler - Top View (typical)
GENERAL INFORMATION
The automatic transmission oil is cooled when it passes through a cooler in radiator outlet tank. This cooler is only to be serviced by radiator
replacement.
CAUTION: 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.
Transmission Oil Auxiliary Cooler - Typical
AUXILIARY OIL-TO-AIR COOLER
Oil-to-air (auxiliary) transmission coolers are mounted ahead of radiator. They operate in conjunction with main cooler located in radiator side tank.
The transmission oil is routed through main cooler in radiator side tank first. It is then routed through auxiliary cooler before returning to transmission.
