Dodge RAM TRUCK 1500 1995 Service Manual page 320

7 - 50 AUTOMATIC TRANSMISSION OIL COOLERS
B R
A U T O M A T I C
T R A N S M I S S I O N OIL COOLERS
INDE1
page
Automatic Transmission Oil Coolers—Diesel
Engine 52
page
Automatic Transmission Oil Coolers—Except Diesel
Engines 50
AUTOMATIC TRANSMISSION OIL COOLERS-
EXCEPT DIESEL ENGINES
WATER-TO-OIL
COOLER
All gas powered models equipped with an auto­
matic transmission are equipped with a transmission
oil cooler mounted internally within the radiator side
tank. This internal cooler is supplied as standard
equipment on all gas powered models equipped with
an automatic transmission.
The internal radiator oil cooler is not used with
the diesel engine.
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 cool­
ant 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.
Also refer to the section on Transmission Air-to-Oil
Coolers. This heavy duty air-to-oil cooler is an option
on most engine packages. It is supplied as standard
equipment on both the 8.0L V-10 and 5.9L diesel en­
gines.
REPLACING WATER-TO-OIL COOLER i l RAiiATOR SIDE
TA1I
The internal transmission oil cooler located within
the radiator is not serviceable. If it requires service,
the radiator must be replaced.
Once the repaired or replacement radiator has
been installed, fill the cooling system and inspect for
leaks. Refer to the Refilling Cooling System and Test­
ing Cooling System For Leaks sections in this group.
If the transmission operates properly after repairing
the leak, drain the transmission and remove the
transmission oil pan. Inspect for sludge and/or rust.
Inspect for a dirty or plugged inlet filter. If none of
these conditions are found, the transmission and
torque convertor may not require reconditioning. Re­
fer to Group 21 for automatic transmission servicing.
AIR-TO-OIL COOLER
5
0
2/5.9L V-8 Gas Powered Engines: An optional
air-to-oil transmission oil cooler is available with
most engine packages. On the 5.2/5.9L V-8 engines,
this' optional cooler is located between the radiator
and air conditioning condenser (Fig. 1).
8.0L V-10 Engine: The air-to-oil cooler is located
in front of and to the left side of the radiator (Fig. 2).
This secondary cooler is supplied as standard equip­
ment on models equipped with the 8.0L V-10 engine
and an automatic transmission.
UPPER RADIATOR
SUPPORT BRACKET
BOLT
RADIATOR
SUPPORT
BRACKET
TRANS. OIL
COOLER
UPPER
MOUNTING
BOLTS (2)
TRANSMISSION
OIL
COOLER
LOWER RADIATOR
SUPPORT BRACKET
BOLTS (2)
TRANS. OIL
COOLER
LOWER
MOUNTING
BOLT J9407-40
1 Air-To-Oil Cooler—3.91 V-6 or 5.2/5.9L V-8
Engines
The oil coolers on all gas powered engines operate
in conjunction with the internal radiator mounted
main oil cooler. The transmission oil is routed
through the main cooler first, then the optional
cooler, before returning to the transmission.
RE10¥AL—AIR-TO-OIL COOLER—3JL/I.2L/5JL ENGINES
If a leak should occur in the internal radiator
mounted transmission air-to-oil cooler (gas engines
only), engine coolant may become mixed with trans­
mission fluid. Transmission fluid may also enter en­
gine cooling system. Both cooling system and
transmission should be drained and inspected in case
of oil cooler leakage.
(1) Disconnect negative battery cable at battery.