1985-1991 Eagle Vista AWD Steering Rack: Noises, Leaks, and Avoiding the FWD Mix-up

Critical Compatibility Warning: AWD Models Only

Symptoms of a Failing Steering Rack

A worn or failing steering rack will provide several sensory clues. Because this is a hydraulic system, symptoms often involve both noises and changes in steering feel, frequently accompanied by fluid leaks.

Noises While Steering

• Clunking or Knocking: A distinct clunk or knock when you turn the steering wheel, especially when changing direction or going over bumps, often points to worn internal gears or loose mounting bushings in the rack.
• Grinding: A grinding noise during turns usually indicates metal-on-metal contact inside the rack, often due to a severe lack of lubrication caused by a fluid leak.
• Whining or Squealing: A whining or squealing sound that gets louder when you turn the wheel is a classic sign of a power steering issue. This is often caused by a low fluid level, which makes the power steering pump work harder, or air getting into the system through a leak.

Changes in Steering Feel

• Stiff or Heavy Steering: If turning the wheel suddenly requires significantly more effort, it indicates a loss of power assist. This can be caused by low fluid pressure from a leak or an internal failure within the rack's valving.
• Loose Steering or "Play": A feeling of looseness or a "dead zone" in the steering wheel, where you can turn it slightly without the wheels responding, points to worn internal components like the rack and pinion gears. This forces you to make constant small corrections to keep the car straight.
• Steering Wheel Doesn't Return to Center: After a turn, the steering wheel should naturally start to return to the straight-ahead position. If it sticks in the turned position or you have to manually turn it back, the rack could be binding internally.
• Vibrations: A vibration or shudder felt in the steering wheel, especially during turns, can be caused by worn rack components or bushings allowing for unwanted movement.

Visual Signs

• Power Steering Fluid Leaks: Reddish-brown or dark brown fluid puddles under the front of your car are a clear sign of a leak. The most common failure point is the seals at either end of the rack. You can check for this by pulling back the rubber bellows (boots) on the inner tie rods; if they are filled with fluid, the internal seals have failed.

Diagnosing the Problem

Before condemning the rack, perform a few simple checks.

1. Check the Power Steering Fluid: With the engine off and cool, locate the power steering fluid reservoir. Check the fluid level on the dipstick. If it's low, you have a leak somewhere in the system. Note the fluid's condition. New fluid is typically reddish; dark, brown, or foamy fluid indicates it's old, contaminated, or has air in it from a leak. Metal particles in the fluid are a sign of severe internal wear in the pump or rack.
2. The "Dry Park" Test: Have a helper turn the steering wheel from lock to lock while the car is parked. Listen carefully for any of the clunking, grinding, or popping noises described above. Place your hand on the steering rack itself (be careful of moving parts if the engine is on) to feel for vibrations that correspond with the noises.
3. Check for Play: Safely raise the front of the vehicle so the wheels are off the ground. Grab a wheel at the 3 and 9 o'clock positions and try to shake it side-to-side. If you feel looseness or hear a clunk, watch the inner tie rod where it connects to the steering rack. If the tie rod moves without the rack itself moving, the inner tie rod is worn. If the whole assembly has play, the rack's internal gears or mounting bushings are likely worn.

Buying a Used 1985-1991 Eagle Vista Steering Rack

Since new OEM parts are no longer manufactured, a quality used or remanufactured rack is your best option. A used OEM rack is often preferable to a cheap new aftermarket part due to better materials and guaranteed fitment.

• Verify the Part Number: The most important step is to confirm the part is stamped with OEM number MB553571. This ensures it is the correct part for your AWD Vista.
• Inspect the Boots: Check the rubber accordion boots on both ends of the rack. They should be free of rips, tears, or cracks. Damaged boots allow dirt and water to enter and destroy the inner seals and tie rods.
• Check the Input Shaft: Inspect the splines on the input shaft where the steering column connects. They should be clean and sharp, not twisted or stripped.
• Look for Damage: Inspect the rack housing for any cracks, heavy corrosion, or signs of impact. Check that the fluid ports are clean and the threads are not damaged.
• Mileage Consideration: While there's no specific failure mileage, steering racks in cars used heavily for city driving may wear out sooner due to more frequent turning. A part from a lower-mileage vehicle is generally a better bet, but a visual inspection is more important.

Cost of Replacement

Replacing a steering rack is a labor-intensive job. The front subframe may need to be lowered for access. After replacement, a professional four-wheel alignment is mandatory.

Related Parts to Consider Replacing

When replacing the steering rack, it's wise to replace other related wear items at the same time to save on future labor costs.

• Outer Tie Rod Ends: The steering rack includes the inner tie rods, but you should almost always replace the outer tie rod ends at the same time.
• Power Steering Hoses: The high-pressure and return hoses can become brittle and leak with age. Replacing them with the rack is good preventative maintenance.
• Rack Mounting Bushings: These rubber bushings isolate the rack from the subframe. If they are worn, they can cause clunking noises and vague steering feel.
• Power Steering Fluid: The entire system should be flushed with fresh, compatible power steering fluid.

Known Issues, Recalls, and Service Bulletins

No specific recalls or Technical Service Bulletins (TSBs) for the steering rack on the 1985-1991 Eagle Vista AWD or its direct Mitsubishi counterparts were found during extensive research. Problems with this part are typically due to age-related wear and tear on seals and mechanical components.

Frequently Asked Questions (FAQ)