2006-2014 Charger, 300, Challenger & Magnum Steering Rack: Leaks, Noises, and the Hidden EHPS Pump

Symptoms of a Failing Steering Rack

A problem with the steering rack can manifest in several ways, from strange noises to a change in steering feel. Ignoring these signs can be dangerous, as a complete failure could lead to a loss of steering control.

Noises and Sounds

• Whining or Squealing: A high-pitched whining or squealing sound, especially when turning the wheel at low speeds, often points to low power steering fluid. This can be caused by a leak in the rack or its connecting hoses.
• Grinding: A grinding noise when turning suggests metal-on-metal contact inside the rack, likely due to a lack of lubrication from a severe fluid leak. This indicates significant internal wear.
• Clunking or Knocking: A clunking sound, particularly when turning or going over bumps, can mean the rack is loose or the internal gears are worn. This can also be caused by worn inner tie rods, which are part of the rack assembly.

Steering Feel and Behavior

• Stiff or Heavy Steering: If turning the wheel suddenly requires much more effort, especially at low speeds, the power assist may be failing. This is often due to low fluid pressure from a leak or a failing pump.
• Loose or Sloppy Steering: A feeling of excessive play or a "dead spot" in the steering wheel means the connection between the steering wheel and the wheels is no longer tight. This can be caused by worn internal components in the rack.
• Vehicle Wandering: If you constantly have to make small corrections to keep the car driving straight on a level road, the steering rack may be worn and unable to hold its position.
• Uneven Steering Assist: The steering may feel easy to turn in one direction but difficult in the other, which can be a sign of a problem with the internal valves of the steering rack.

Visual Signs and Fluid Check

One of the most definitive signs of a steering rack problem is a fluid leak. Power steering fluid is typically red or reddish-brown. If you see this type of fluid dripping from the front-center of your car, it's likely a leak from the rack or power steering hoses. You should also check the fluid reservoir.

A burnt smell from the fluid indicates it is overheating, which can damage the pump and the rack. Dark or black fluid with metal particles suggests severe internal wear, and the entire system may be contaminated.

Key Vehicle Differences: 2006-2010 vs. 2011-2014

A major change occurred in the power steering system for the 2011 model year on the Dodge Charger and Chrysler 300, which also applies to the Challenger. Understanding this difference is critical for diagnosis and service.

2006-2010 Dodge Charger, Chrysler 300 & Dodge Magnum; 2008-2010 Dodge Challenger

• System Type: Standard belt-driven hydraulic power steering.
• Reservoir Location: Easily accessible in the engine bay, typically on the driver's side.
• Fluid Type: Mopar Power Steering Fluid +4 or ATF+4 Automatic Transmission Fluid.

2011-2014 Dodge Charger, Chrysler 300 & Dodge Challenger

• System Type: Electro-Hydraulic Power Steering (EHPS). This system uses an electric motor to run the hydraulic pump.
• Reservoir Location: The pump and reservoir are a single unit hidden in the front passenger-side wheel well. Access requires jacking up the vehicle, removing the front passenger wheel, and pulling back the fender liner.
• Fluid Type: Requires a specific fluid meeting Mopar MS-11655 specification. Using the wrong fluid, like ATF+4, can damage the EHPS pump.

Buying a Used Steering Gear Poppet Rack

A used OEM steering rack can be a cost-effective and reliable alternative to expensive new parts or sometimes inconsistent remanufactured units. However, careful inspection is key.

• Inspect for Leaks: Check the entire rack body for any signs of fluid residue, especially around the input shaft seal and where the inner tie rods exit the housing.
• Check the Bellows Boots: The rubber boots on each end of the rack must be intact. Torn or cracked boots allow dirt and water to enter, which will quickly destroy the inner seals and tie rods.
• Examine the Tie Rods: The rack assembly includes the inner tie rods. While holding the rack steady, try to move the inner tie rods up and down. There should be no excessive play or clunking.
• Check Mounting Points: Ensure the mounting points and brackets are not cracked, bent, or damaged.
• Mileage Considerations: While these racks can last over 100,000 miles, failures are not uncommon between 60,000 and 90,000 miles. A lower-mileage part is always preferable. Ask the seller for the mileage of the donor vehicle if possible.
• Why Used OEM? A genuine used Mopar rack was built to the original factory specifications for materials and tolerances. This often results in better longevity and a more precise steering feel compared to some aftermarket parts, which may use lower-quality seals or bearings.

Cost Breakdown for Replacement

The cost to replace a steering rack can vary significantly based on the parts chosen and local labor rates. An alignment is always required after replacement, adding to the total cost.

Replacement Overview & Special Procedures

Replacing the steering rack is an advanced DIY job that requires proper tools and safety precautions. If you are not comfortable with the procedure, it is best left to a professional mechanic.

1. Lift and Secure: Safely lift the front of the vehicle and support it with jack stands. Remove the front wheels.
2. Access the Rack: For 2011+ models, you may need to remove the fender liner to access the EHPS pump and lines.
3. Disconnect Tie Rods: Loosen the jam nuts and disconnect the outer tie rod ends from the steering knuckles. A sharp blow with a hammer on the side of the knuckle or a tie rod separator tool is usually required.
4. Disconnect Lines: Using a flare nut wrench to avoid stripping the fittings, disconnect the high-pressure and return lines from the rack. Have a drain pan ready to catch the fluid.
5. Disconnect Steering Shaft: Remove the pinch bolt connecting the intermediate steering shaft to the input shaft of the rack.
6. Unbolt the Rack: Remove the main mounting bolts that secure the steering rack to the vehicle's subframe.
7. Install New Rack: Maneuver the new rack into place and follow the steps in reverse. It is critical to get a professional wheel alignment immediately after installation to ensure proper handling and prevent rapid tire wear.

Torque Specs

Finding verified torque specifications without access to a factory service manual is difficult. Generic advice suggests using a standard torque value for the fastener size. However, due to the critical safety nature of steering components, it is strongly recommended to consult a vehicle-specific repair manual for the exact torque specs for the rack mounting bolts and tie rod end nuts.

Frequently Asked Questions (FAQ)