Steering Gear Replacement Guide for the 1973-1981 Buick Century
Address steering wander and leaks by choosing the right replacement steering gear for your classic Century.
- The most common failure symptom is excessive steering wheel play or 'wander'.
- Remanufactured brands like Cardone are affordable but can have inconsistent quality; high-performance brands like Flaming River offer a significant upgrade.
- A pitman arm puller is an essential tool for DIY replacement.
- Always flush the old power steering fluid and bleed the system of air after installing a new gear to prevent damage and noise.
Is Your Buick Century's Steering Feeling Vague?
The Saginaw-style steering gear in the 1973-1981 Buick Century is a robust unit, but after 40+ years of service, wear and tear is inevitable. The most common complaint is excessive "play" or looseness in the steering. You might find yourself constantly making small corrections to the steering wheel just to keep the car driving in a straight line. This is often due to worn internal gears and bearings inside the box.
Signs It's Time for a New Steering Gear
Look out for these common symptoms of a failing steering gear. It's important to distinguish these from issues with other components like the power steering pump, which typically causes whining noises.
- Excessive Steering Play: This is the number one sign. If you can move the steering wheel more than a couple of inches back and forth before the wheels start to turn, the gear is likely worn.
- Fluid Leaks: Puddles of reddish or brown power steering fluid under the front of the car, specifically dripping from where the steering shaft enters or the pitman arm exits the gearbox, point to failing seals.
- Binding or Stiff Spots: If the steering feels tight in some spots and loose in others as you turn the wheel, the internal gears may be damaged or binding.
- Popping or Clunking Noises: Unusual noises that occur specifically when you turn the wheel can indicate broken gear teeth or worn bearings inside the box.
Pro Tip: Check Other Parts First
Before blaming the steering gear, have a helper rock the steering wheel back and forth while you watch the steering components. Check for play in the rag joint (the coupler on the steering shaft), tie rod ends, and idler arm. Sometimes looseness originates in these other wear items.
Choosing the Right Aftermarket Steering Gear
For a vehicle of this age, new original GM parts are no longer available. Your choices are remanufactured units or new aftermarket performance units.
Brand Tiers for Your Century
- Standard Remanufactured (BBB Industries, Cardone): These are the most common and affordable options. Brands like Cardone and BBB Industries take original steering gears, rebuild them with new seals, and test them. However, quality can be inconsistent; some units work perfectly for years, while others may have issues with play or leaks soon after installation. These are a good budget choice, but be aware of the potential for variability.
- New Aftermarket (PWR): Brands like PWR offer new steering gears that are not rebuilt from old cores. This can sometimes provide more consistent quality than a remanufactured part. They often fall in a mid-range price point.
- High-Performance New (Flaming River): For owners looking for an upgrade, Flaming River offers brand-new steering gears, often with quicker steering ratios (fewer turns lock-to-lock). This provides a more modern, responsive steering feel. They are the most expensive option but are known for high quality and performance in the classic car community.
Estimated Replacement Costs
The cost to replace your steering gear will depend on the part you choose and local labor rates. The job is moderately difficult and can be done by a skilled DIYer with the right tools, including a pitman arm puller.
| Item | Estimated Cost |
|---|---|
| New Aftermarket Steering Gear | $184.10 - $829.18 |
| Shop Labor | $250 - $450 |
| Total Estimated Cost | $434.10 - $1279.18 |
Note: Many remanufactured steering gears require a "core charge." This is a deposit you pay and get back when you return your old, rebuildable steering gear.
Frequently Asked Questions
Do I need a special tool to replace the steering gear?
Yes, the most important special tool is a pitman arm puller. The pitman arm is pressed onto the steering gear's output shaft and is very difficult to remove without this tool. Attempting to remove it with a hammer can damage other components.
Should I get a standard or quick-ratio steering gear?
This depends on your preference. A standard ratio box will feel like the original factory steering. A quick-ratio box, like those often sold by Flaming River, will make the steering feel more responsive and require less turning of the steering wheel to make the car change direction. It's a popular upgrade for a better driving experience.
Why is my new steering gear making noise?
If you hear a whining noise after installation, it is almost always caused by air trapped in the power steering system. You must bleed the system by turning the steering wheel from lock to lock several times with the engine running, while keeping the fluid reservoir topped off.
Were there any recalls for the 1973-1981 Century steering gear?
No. Searches of the National Highway Traffic Safety Administration (NHTSA) database show no open recalls or widespread technical service bulletins (TSBs) for the steering gear on this specific vehicle. This is normal for a car of this vintage.
Technical Specifications
This vehicle uses a Saginaw-style recirculating ball steering gear. Key variations include standard vs. quick ratio and the specific spline count on the input shaft, which must match your vehicle's steering coupler (rag joint).
We Have This Part in Stock
The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.