Cherokee 4WD L6-4.0L VIN S (1998)
Transmission Cooler: Description and Operation
WATER-TO-OIL COOLER
All models equipped with an automatic transmission are equipped with a transmission oil cooler mounted internally within the radiator tank. This
internal cooler is supplied as standard equipment on all models equipped with an automatic transmission.
Transmission oil is cooled when it passes through this separate cooler. In case of a leak in the internal radiator mounted transmission oil cooler, engine
coolant may become mixed with transmission fluid or transmission fluid may enter engine cooling system. Both cooling system and transmission
should be drained and inspected if the internal radiator mounted transmission cooler is leaking.
AIR-TO-OIL COOLER
An auxiliary air-to-oil transmission oil cooler is available with most engine packages.
The auxiliary air-to-oil transmission oil cooler is located in front of the radiator or A/C condenser (if equipped) and behind the grill. It is mounted to
the front frame crossmember.
The auxiliary oil coolers on all models operate in conjunction with the internal radiator mounted main oil cooler. The transmission oil is routed
through the main cooler first, then the auxiliary cooler, before returning to the transmission.
