Flush the coolant on the 2002 tundra

Draining Procedure

1. Park the vehicle on a level surface.
2. Remove the surge tank cap.
3. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
4. Remove the air deflector. Refer to Front Air Deflector Replacement in Body Front End.
5. Place a drain pan under the lower radiator hose connection at the bottom of the radiator.
6. Using J 38185 slide the hose clamp back on the hose.
7. Slowly remove the lower radiator hose and drain the coolant into the drain pan.
8. Inspect the engine coolant for the following conditions:

?€¢
Discolored appearance -- follow the flush procedure. Refer to Flushing .

?€¢
Normal in appearance -- follow the filling procedure.

Four wheel drive actuator may me at fault, try park the truck on a slick surface like wet grass, set it in neutral and activate 4hi and 4lo back to 2wd a few times, if doesn't help try tapping on motor actuator located on transfer case while someone activates selector, park surface must be as level as possible, a good tip is to activate your four wheel drive once every few months to avoid it freezing up.If nothing helps then it needs to be diagnos by a tech. good luck

PROCEDURE TO FLUSH

• Park the Toyota Tundra on a level surface and set the parking brake. Then, with the engine off, touch the radiator to gauge its temperature. If the radiator is still warm, allow it to cool off before you start next step.
• Twist the radiator cap one full turn, pause for a few seconds and then fully remove the cap. You want to pause to relieve any internal pressure inside the radiator. Opening a pressurized or hot radiator can cause it to spew hot coolant and burn anyone it comes into contact with.
• Position a bucket or tray with a two-gallon capacity underneath the radiator, below the drain plug. To access the drain plug, you may have to remove the plastic engine undercover, which should be on the driver's side of the Toyota Tundra's radiator. Use a socket wrench to open the plug.
• Open the drain plug and allow the existing coolant to drain completely into the bucket. Once complete, pour the old coolant into a sealable container for proper disposal.
• Put the drain bucket back under the radiator and close the drain plug. Then, fill the radiator with distilled water. Next, open the drain plug to let the water flow into the bucket. Replicate this procedure until the water runs debris free out the radiator.
• Replace the radiator drain plug and pour fresh coolant into the radiator until it's within an inch of overflowing. With the Toyota Tundra, you need to use the same coolant that came with the truck. Most likely, it is Toyota Long Life red coolant, but consult the owner's manual to be sure.
• Start the engine of the Tundra and turn the heating fan to high. Allow it to run until the cooling fan turns on two separate times.
• Switch the Toyato Tundra off and check the coolant level. If it is lower than before, add more coolant. If not, put the radiator cap back on and close the hood.

1. TIPS

• You will need 2 gallons of coolant for the four-valve Toyota Tundra and 3 gallons of coolant for the six-valve model.
• Using tap water from a hose is an alternative to flushing with distilled water, but tap water can leave sediments behind that can damage your coolant system

WARNING

• Because coolant is extremely toxic to people and pets, it's imperative that you dispose of the old coolant properly.

The clutch lock up converter is locked,there is a solenoid that may be bad,or you need a new converter.torque converter.