GM 5678504 Nos Steering Gear Shaft Worm Ball Nut 20-1-68 67-69 64-67

( Brand: Gm ), ( Manufacturer Part Number: 5678504 ), ( Type: Steering Shaft Assembly ), ( Ipn: 20 1 68 ), ( Oe/oem Part Number: Chevrolet Sport Coupe Convertible Hardtop Lemans Tempest, 1964 1965 1966 1967 1968 Ram Air F85 Cutlass 442 Delta 88 ), ( Universal Fitment: No ), ( Vintage Part: Yes ), ( Country Of Origin: United States )

Review GM Nos Chevy 67-69 Pontiac 64-67 Steering Gear Shaft Worm Ball Nut Read fits CAMARO GTO

The **GM 5678504 NOS (New Old Stock) Steering Gear Shaft Worm and Ball Nut Assembly** is a meticulously preserved, high-performance component designed exclusively for classic American muscle cars, including the legendary **1967-1969 Chevrolet Camaro** and the iconic **1964-1967 Pontiac GTO**. This rare, factory-direct part is a critical element of the vehicle s power steering system, ensuring smooth, responsive, and precise handling essential for both the raw aggression of a high-revving V8 and the refined maneuverability of a well-tuned muscle machine. Crafted from durable, heat-treated steel, the **worm and ball nut assembly** features a precision-ground helical worm gear that meshes seamlessly with the steering rack, converting rotational force from the steering wheel into linear motion with minimal play or wear. The **ball nut mechanism**, a hallmark of GM s engineering in this era, utilizes recirculating ball bearings to reduce friction and extend the lifespan of the component, making it a reliable choice for both street and track applications. This NOS part is a direct replacement for the original equipment found in these legendary models, ensuring an exact fit without the need for modification, while also maintaining the authentic character of the vehicle s original build. Whether restoring a showroom-fresh GTO or reviving a Camaro with a fresh paint job and modern upgrades, this steering gear shaft assembly delivers the quiet confidence of knowing that every turn of the wheel is met with the same effortless precision as the day it left the factory. Its inclusion in a restoration project not only preserves the mechanical integrity of the steering system but also enhances the overall driving experience, allowing enthusiasts to relive the unmatched handling dynamics that made these cars legends in their prime.

### **Pros and Cons of Buying a GM 5678504 NOS Steering Gear Shaft (Worm & Ball Nut) for 1967-69 Camaro and 1964-67 GTO**

1. **Original Equipment Quality (OEM)** This part is factory-new-old-stock (NOS), meaning it was never installed and retains its original condition. GM s early steering gear assemblies were robustly built, often lasting decades with proper maintenance.

2. **Direct Fitment** The **5678504** is a known correct part number for the **1967-69 Camaro** and **1964-67 GTO**, ensuring compatibility without modification. It includes the **worm and ball nut assembly**, which is critical for smooth, precise steering.

3. **Reliability** Early GM steering gears were designed for durability. Many still function perfectly in original cars today, especially if the rest of the steering system (rack, linkages, etc.) is in good condition.

4. **Aesthetic & Historical Value** For classic car enthusiasts, NOS parts preserve the original look and feel of the vehicle. Restoring with original components is often preferred for authenticity.

5. **Potential Long-Term Savings** If the rest of the steering system is intact, this part may last the life of the car, avoiding future replacements. Many modern aftermarket alternatives may wear out faster or require frequent adjustments.

6. **Ease of Installation** Since it s a direct replacement, installation is straightforward if the mounting points and linkages are undamaged. No major modifications to the car s steering column or linkages are typically needed.

7. **Compatibility with Aftermarket Upgrades** While this is an OEM part, it can still work with aftermarket steering columns (like Mopar or aftermarket Chevy columns) if the mounting holes align properly.

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1. **Age-Related Wear** Even though it s NOS, the part may show signs of **dryness or rust** if stored improperly for decades. The worm gear could be stiff, requiring lubrication or cleaning before installation.

2. **Potential for Hidden Damage** Without a thorough inspection, internal components (like the ball nut bearings or worm gear teeth) could be worn or corroded. Some NOS parts develop internal issues over time due to lack of use.

3. **Limited Availability & Pricing** NOS parts for classic cars are becoming increasingly rare and expensive. This specific part may command a high price, especially if sourced from a reputable seller.

4. **No Modern Improvements** Unlike some aftermarket alternatives, this part lacks modern enhancements such as **self-adjusting mechanisms, improved lubrication, or reinforced materials**, which could extend its lifespan further.

5. **Installation Challenges** If the car s steering column or linkages have been modified (e.g., for a different steering ratio or aftermarket column), fitment may not be perfect, requiring adjustments.

6. **Risk of Counterfeit NOS Parts** The NOS market has seen an increase in **reconditioned or fake NOS parts** sold as genuine. Buyers must verify the part s authenticity through **serial numbers, provenance, or inspection by a trusted mechanic**.

7. **Maintenance Requirements** Even a NOS part will need **regular lubrication** (every few years) to prevent stiffness. Neglecting this can lead to premature failure.

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### **Conclusion & Recommendation**

#### **Who Should Buy This Part?**

- **Restorers & Purists** If you re restoring a **1964-67 GTO or 1967-69 Camaro** to factory condition and prioritize authenticity, this NOS part is an excellent choice.

- **Enthusiasts with Original Steering Systems** If the rest of your steering system (rack, linkages, column) is intact and you want a **direct, no-compromise replacement**, this is ideal.

- **Those Willing to Inspect & Maintain** Since age-related issues are possible, you must **test the part for smooth operation** before installation and **plan for periodic lubrication**.

#### **Who Should Consider Alternatives?**

- **Budget-Conscious Buyers** If cost is a major concern, **aftermarket worm & ball nut kits** (from brands like **Steering Systems, Inc. or ECS**) may be more affordable while still providing reliable performance.

- **Cars with Modified Steering** If your car has an aftermarket steering column or linkages, a **custom-fit or universal worm gear** might be necessary.

- **Those Seeking Long-Term Guarantees** Some aftermarket parts come with **warranties or better wear resistance**, which may outweigh the nostalgia factor.

You re restoring a classic car and want **original components**.

You re confident in **inspecting the part** for wear before installation.

You re willing to **maintain it properly** (lubrication, occasional checks).

The price is reasonable compared to aftermarket alternatives.

You suspect the part may be **dry, rusted, or counterfeit**.

Your car has **significant steering modifications** that could complicate fitment.

You re on a tight budget and can find a **reputable aftermarket equivalent** at a lower cost.

- **Buy from a trusted seller** (eBay, specialty classic car parts dealers, or auctions with inspection options).

- **Test the part before installation** Spin the worm gear by hand to check for smoothness; listen for unusual noises.

- **Lubricate immediately** upon installation with **high-quality steering gear grease** (e.g., **Mobilgrease 1 or Lucas Steering Gear Grease**).

- **Consider a backup plan** Keep an aftermarket worm gear on hand in case issues arise.

For most **serious restorers**, the **5678504 NOS worm & ball nut is a worthwhile investment** if sourced correctly. For others, a **high-quality aftermarket replacement** may offer better value without sacrificing performance.

Details:

New old stock GM# 5678504 Saginaw steering shaft gear with worm ball nut that was still sealed before these photos and is about as nice it could be. Chevrolet: 1967 Camaro Sport Coupe - 1968-69 w/spl stag 302 excl p/s. Pontiac: 1964-67 All A SS 20 to 1 ratio. Most of those guys do not even own their parts, they are relying on the parts being shipped from some third party IF have them and you know condition until it arrives at your door.

Exceptionally rare to find in any condition and here is one that not all pitted or rusted. We find in several GM parts books. Getting to be a very hard find part NOS. Oldsmobile: 1964-68 Police MS, HD MS is manual steering 20 to 1 ratio.

part #: 5678504 prices

• $99.99-$159.95

specifications pitmanidlear:

• for models: Gto, Camaro
• for makes: Chevy, Pontiac
• brand: Gm
• mpn: 5678504
• type: Steering Shaft Assembly
• ipn: 20 1 68
• oe/oem part number: Chevrolet Sport Coupe Convertible Hardtop Lemans Tempest, 1964 1965 1966 1967 1968 Ram Air F85 Cutlass 442 Delta 88
• universal fitment: No
• vintage part: Yes
• country of origin: United States

general pitmanidlear:

• condition: Used
• Car Truck Parts Accessories > Steering Suspension > Pitman Idler Arms

payments pitmanidlear:

• credit card: Diners-club
• other
• wallet: Paypal

offer pitmanidlear:

• quantity: 1
• options: Ship-to-home
• started: February 23, 2026
• availability: In Stock
• sold: 0

seller pitmanidlear:

• city: Adel, Georgia
• # reviews: 4142
• rating: 100.0%

returns pitmanidlear:

• policy: No Returns

shipping pitmanidlear:

• cost: $15.00
• service: Economy
• transit: 4-9 Days
• type: Fixed
• class: Economy

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