C 2500 Suburban 2WD V8-454 7.4L VIN J SFI (1998)
oil cooler feed line at the radiator and restart the engine.
Depending on the flow rate, do the following inspections:
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Insufficient Feed Flow-Inspect the transmission for the cause.
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Sufficient Feed Flow-Inspect the oil cooler pipes and the fittings for restrictions or leaks. Repeat the oil cooler flushing procedure. Repeat the
check of fluid flow out of the return line. If the flow is still restricted, replace the transmission oil cooler. Refer to Oil Cooler Line
Replacement
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Remove the discharge hose.
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Reconnect the cooler return pipe to the transmission.
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Refill the unit to the proper fluid level. Refer to Transmission Fluid Checking Procedure.
TOOL CLEANING PROCEDURE
1. Clean the tool with every third use.
2. Disconnect the water supply hose from the tool.
3. Bleed air pressure from the can, remove the fill cap, return any unused solution to the container and rinse the can out with water. Do not store the
tool with the solution in the tank.
4. Remove the screen from the plumbing and wash it with water.
5. Use the cleaning pin in order to remove any material in the solution orifice. The orifice is located in the plumbing below the screen.
6. Reconnect the plumbing and fill the can half with water. Secure the fill cap and pressurize the can to 550 - 700 kPa (80 - 100 psi).
7. Aim the tool into the 18.92 L (5 gallon) pail or floor drain and depress the trigger. Allow the water from the can to flow through the solution
orifice for 30 seconds in order to ensure proper cleaning.
8. Bleed air pressure from can, remove the fill cap, and empty the can.
9. Reconnect the fill cap to the flushing tool.
