Power Steering Fluid Flush

Complete power steering fluid flush for 2008 Dodge Viper 8.4L V10, including evacuation of old fluid and refilling with fresh Mopar ATF+4.

Warnings

Tools required

Parts

• Power steering fluid × 1 — Mopar ATF+4

Fluids

• power_steering — 1.5 qt

Preparation

1. Park vehicle on level surface and apply parking brake.
2. Place wheel chocks behind rear wheels.
3. Allow engine to cool completely if recently driven.
4. Open hood and locate power steering fluid reservoir on passenger side of engine bay.
5. Clean area around reservoir cap to prevent contamination.

Procedure

1. 1

   Remove old fluid from reservoir
   Remove the power steering reservoir cap. Use a turkey baster or fluid transfer pump to extract as much old fluid as possible from the reservoir. Transfer old fluid to drain pan. Continue until reservoir is as empty as possible without accessing lower lines.
2. 2

   Raise front of vehicle
   Raise the front of the vehicle using a jack and support securely on jack stands. This provides clearance to turn the steering wheel lock-to-lock and access to verify for leaks afterward. Ensure vehicle is stable before proceeding.
3. 3

   Locate low pressure return line
   Identify the power steering return line (low pressure hose) that connects to the reservoir. This is typically the lower hose connection on the reservoir. Place drain pan directly beneath this connection point.
4. 4

   Disconnect return line
   Loosen the hose clamp securing the return line to the reservoir using pliers or a screwdriver. Carefully pull the return hose off the reservoir nipple. Allow old fluid to drain from both the hose and reservoir into the drain pan. If using optional vinyl tubing, attach it to the return hose end and route into drain pan to contain fluid during flushing.
5. 5

   Fill reservoir with fresh fluid
   Using a funnel, fill the power steering reservoir with fresh Mopar ATF+4 fluid (verify correct fluid spec against Viper service documentation) to the FULL COLD mark. Ensure you have 2-3 quarts available for a complete flush. Keep a bottle of fluid nearby as you will need to continuously refill during the flushing process.
6. 6

   Cycle steering to purge system
   Without starting the engine, turn the steering wheel slowly from full lock left to full lock right and back. This cycles fluid through the system and pushes old fluid out the disconnected return line. Watch the fluid draining into the pan - initially it will be dark/contaminated. Continue turning the wheel lock-to-lock while repeatedly refilling the reservoir with fresh fluid. Do not let the reservoir run empty as this introduces air into the system.
7. 7

   Continue flushing until fluid runs clean
   Keep cycling the steering wheel and refilling the reservoir until the fluid draining from the return line runs clean and matches the color of fresh ATF+4 (bright red). This typically requires 2 to 3 quarts of fresh fluid to completely flush the system, since dirty fluid must be fully displaced. Verify the exact power steering system capacity against Dodge Viper service documentation before purchasing fluid.
8. 8

   Reconnect return line
   Once fluid runs clean, reconnect the return hose to the reservoir nipple while holding the reservoir topped off with fluid. Secure the hose with the clamp, ensuring it is tight and properly positioned to prevent leaks.
9. 9

   Fill to proper level and bleed air
   Fill the reservoir to the FULL COLD mark. Start the engine and let it idle. Turn the steering wheel slowly from lock to lock 3-4 times to bleed any remaining air from the system. The fluid level will drop as air is purged - add fluid as needed to maintain proper level. Check for any leaks around the reservoir and return line connection.
10. 10

    Final level check and test
    With engine running and at operating temperature, turn the steering wheel through full travel several times. Shut off engine and check final fluid level - it should be between FULL COLD and FULL HOT marks. Add fluid if necessary. Inspect all connections for leaks. Lower vehicle from jack stands.

Reassembly

1. Ensure return line hose clamp is properly tightened and positioned.
2. Verify power steering reservoir cap is securely installed.
3. Wipe up any spilled fluid from engine bay and undercarriage.
4. Lower vehicle and remove jack stands and wheel chocks.

Verification

• Check power steering fluid level with engine cold - should be at FULL COLD mark.
• Start engine and verify no leaks from reservoir or return line connection.
• Turn steering wheel lock to lock - operation should be smooth with no whining or groaning noises indicating air in system.
• Fluid in reservoir should be bright red (fresh ATF+4 color) with no foaming or bubbles.
• Test drive vehicle and verify power steering assist functions normally with no unusual noises.

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