RAM 3500 Truck 4WD L6-5.9L DSL Turbo VIN 6 (1998)
Transmission Cooler: Service and Repair
Water to Oil Cooler
REMOVAL
CAUTION: If a leak should occur in the water-to-oil cooler mounted to the side of the engine block, engine coolant may become mixed with
transmission fluid. Transmission fluid may also enter engine cooling system. Both cooling system and transmission should be drained and
inspected in case of oil cooler leakage.
1. Disconnect both battery negative cables.
2. Remove air cleaner assembly and air cleaner intake hoses.
3. Drain cooling system. Refer to Draining Cooling System.
4. Disconnect coolant lines from cooler.
5. Disconnect transmission oil lines from cooler. Plug cooler lines to prevent oil leakage.
Transmission Water-To-Oil Cooler-Diesel
6. Remove oil cooler mounting straps.
7. Lift oil cooler off of mounting bracket.
8. If replacing cooler, make sure to transfer converter drain back valve to new cooler.
INSTALLATION
1. Position oil cooler on bracket.
2. Install mounting straps.
3. Connect transmission oil lines to cooler.
4. Connect coolant hoses to cooler.
5. Connect battery negative cables.
6. Fill cooling system. Refer to Refilling Cooling System.
7. Check transmission oil level and fill as necessary.
8. Install air cleaner assembly and air cleaner intake hoses.