Power steering problems are common on ageing VN, VP, VR, and VS Commodores. While Holden’s rack-and-pinion steering system is generally reliable, decades of use, worn seals, deteriorated hoses, and high mileage can eventually lead to leaks, noise, heavy steering, and poor steering feel.

A properly functioning power steering system makes these Commodores comfortable and easy to drive, but when faults develop they can quickly affect vehicle safety, handling, and driver confidence.

How the Power Steering System Works

The VN–VS Commodore uses a hydraulic power steering system.

Main Components

• Power steering pump
• Steering rack
• High-pressure hoses
• Return hoses
• Power steering fluid reservoir
• Drive belt

The system uses hydraulic pressure to reduce steering effort.

Why Power Steering Problems Occur

Most issues are age-related.

Common Causes

• Worn seals
• Fluid leaks
• Pump wear
• Hose deterioration
• Contaminated fluid
• High mileage

Many original steering components are now over 30 years old.

Common Power Steering Symptoms

Before identifying specific faults, it’s useful to recognise the warning signs.

Common Symptoms

• Heavy steering
• Steering noise
• Fluid leaks
• Steering vibration
• Groaning noises
• Uneven steering assistance
• Fluid loss

These symptoms often indicate developing problems.

1. Power Steering Fluid Leaks

The most common Commodore steering issue.

Symptoms

• Fluid on driveway
• Low fluid level
• Whining pump
• Heavy steering

Common Leak Locations

• Steering rack seals
• Pressure hose fittings
• Return hose connections
• Pump shaft seal

Leaks should be repaired promptly.

2. Steering Rack Seal Failure

One of the most common high-kilometre faults.

Symptoms

• Fluid leaking from rack ends
• Wet steering rack boots
• Gradual fluid loss

Causes

• Seal wear
• Age-related deterioration
• Internal rack wear

Many original racks eventually require rebuilding.

3. Power Steering Pump Wear

The pump is responsible for generating hydraulic pressure.

Symptoms

• Whining noise
• Heavy steering
• Reduced steering assistance

Causes

• Bearing wear
• Internal pump wear
• Fluid contamination

Pump noise often worsens during parking manoeuvres.

4. Whining Steering Pump

A common owner complaint.

Symptoms

• High-pitched whining noise
• Noise increases with steering input

Causes

• Low fluid level
• Air in system
• Pump wear

Always check fluid level first.

5. Heavy Steering

One of the most noticeable faults.

Symptoms

• Increased steering effort
• Difficult parking
• Reduced steering assistance

Causes

• Pump failure
• Fluid leaks
• Steering rack problems
• Drive belt issues

Heavy steering should never be ignored.

6. Air in the Steering System

Air contamination affects hydraulic performance.

Symptoms

• Foamy fluid
• Steering noise
• Jerky steering operation

Causes

• Low fluid level
• Leaking hoses
• Improper bleeding

7. Power Steering Hose Failure

The hoses experience constant pressure and heat.

Symptoms

• Fluid leaks
• Steering noise
• Reduced assistance

Common Failures

• Cracked rubber hoses
• Loose fittings
• Pressure hose deterioration

Older hoses often become brittle.

8. Drive Belt Problems

The steering pump relies on the accessory belt.

Symptoms

• Heavy steering
• Belt squeal
• Reduced pump performance

Causes

• Loose belt
• Worn belt
• Incorrect tension

A slipping belt can mimic pump failure.

9. Steering Rack Wear

Internal rack wear develops over time.

Symptoms

• Loose steering
• Fluid leaks
• Steering play

Causes

• High mileage
• Seal wear
• Internal component wear

Rebuilt racks are commonly available.

10. Steering Shudder

Some Commodores develop steering vibration.

Symptoms

• Steering wheel vibration
• Shudder while turning

Causes

• Air in fluid
• Pump wear
• Tyre issues
• Suspension problems

Proper diagnosis is essential.

11. Contaminated Power Steering Fluid

Old fluid contributes to many steering issues.

Symptoms

• Dark fluid colour
• Noise
• Reduced steering performance

Causes

• Lack of maintenance
• Internal component wear

Fresh fluid often improves operation.

12. Steering Column Coupling Wear

Not strictly part of the hydraulic system but often mistaken for steering rack faults.

Symptoms

• Steering play
• Clunking
• Loose steering feel

Causes

• Age
• Component wear

Common Fluid Leak Locations

Steering Rack Boots

Often indicate internal rack seal failure.

Pump Shaft Seal

Can leak onto surrounding components.

Pressure Hose Connections

Common leak point on older vehicles.

Reservoir Connections

Hose deterioration can cause seepage.

How to Diagnose Power Steering Problems

Step 1: Check Fluid Level

Low fluid causes numerous issues.

Step 2: Inspect Fluid Condition

Healthy fluid should be:

• Clean
• Free of contamination
• Correct colour

Step 3: Inspect for Leaks

Check:

• Steering rack
• Hoses
• Pump
• Reservoir

Step 4: Listen for Noise

Pump noise often identifies developing failures.

Step 5: Check Belt Condition

Inspect for:

• Cracks
• Glazing
• Incorrect tension

Steering Rack Rebuild vs Replacement

A common decision for owners.

Rebuild Benefits

• Retains original housing
• Cost-effective

Replacement Benefits

• Faster installation
• Often includes warranty

Both options can be effective.

Best Power Steering Maintenance

Replace Fluid Periodically

Many systems still contain decades-old fluid.

Repair Leaks Early

Prevents pump damage.

Maintain Correct Fluid Level

Low fluid quickly damages pumps.

Inspect Hoses Regularly

Replace ageing hoses before failure occurs.

Best Upgrades for VN–VS Steering Systems

Heavy-Duty Steering Rack

Provides improved durability.

Braided Pressure Hoses

More resistant to ageing and heat.

New Pump and Rack Package

Ideal during major restorations.

Warning Signs of Imminent Failure

• Constant whining
• Rapid fluid loss
• Extremely heavy steering
• Steering shudder
• Foamy fluid

Prompt repairs can prevent more expensive damage.

Common Misdiagnoses

Pump Noise

May actually be caused by low fluid.

Steering Shudder

Can originate from suspension issues.

Heavy Steering

May result from a slipping drive belt rather than a failed pump.

Always diagnose carefully before replacing parts.

Power steering problems are extremely common on VN, VP, VR, and VS Commodores due to age and high mileage. Fluid leaks, steering rack seal failure, pump wear, hose deterioration, and contaminated fluid account for the majority of faults encountered today.

Fortunately, most issues provide clear warning signs before complete failure occurs. Regular fluid inspections, leak repairs, and preventative maintenance can dramatically extend the life of the steering system.

Whether you’re restoring a classic Commodore or maintaining a daily driver, keeping the power steering system in good condition will improve safety, comfort, and overall driving enjoyment.

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