NISSAN 31020ZL40C Automatic Transmission Cylinder 400-51042

( Manufacturer Part Number: 31020ZL40C ), ( Model: FRONTIER ), ( Part Type: Transmission Cylinder ), ( Conditions Options: 4.0 ), ( Genuine Oem: Yes ), ( Ipn: 400-51042 ), ( Manufacturer Warranty: 90 Day )

Review NISSAN Automatic Transmission Cylinder Cab fits FRONTIER KING 2WD 2009

The **Nissan 31020-ZL40C Automatic Transmission Cylinder (King Pin) for 2WD 2009 Frontier** is a precision-engineered component designed to deliver seamless and reliable performance in the transmission system of your Nissan Frontier. This high-quality, direct-fit replacement is meticulously crafted to match the exact specifications of the original equipment manufacturer (OEM), ensuring compatibility with the 2009 model year and 2WD configuration. The transmission cylinder, often referred to as the "king pin," plays a critical role in the hydraulic operation of the automatic transmission, facilitating smooth gear shifts and maintaining optimal fluid pressure throughout the drivetrain. Constructed from durable, heat-resistant materials, this cylinder is engineered to withstand the demands of daily driving, including stop-and-go traffic, towing, and off-road adventures, where consistent hydraulic performance is essential. Its robust design minimizes the risk of leaks, ensuring that transmission fluid remains contained within the system, thereby protecting internal components from contamination and premature wear. Whether you're upgrading an existing transmission or replacing a worn-out part, this cylinder offers a dependable solution that enhances the longevity and efficiency of your Frontier s automatic transmission. With a focus on durability and performance, this component is an excellent choice for those seeking a reliable, long-lasting fix for transmission-related issues.

**Pros and Cons of Buying a 2009 Nissan Frontier 3.1L V6 (31020ZL40C) with Automatic Transmission and King 2WD**

### **Pros**

1. **Reliability and Durability** The 3.1L V6 engine in the 2009 Frontier is known for being robust and capable of handling heavy loads, making it a solid choice for work trucks and towing. Many owners report few major issues if maintained properly.

2. **Strong Towing and Hauling Capacity** With a towing rating of up to **6,500 lbs** (when properly equipped) and a payload capacity of around **1,600 1,800 lbs**, this truck is well-suited for construction, farming, or heavy-duty tasks.

3. **King 2WD Package** The King 2WD trim includes features like a **heavy-duty suspension, skid plates, and reinforced frame**, which improve off-road capability and longevity compared to base models.

4. **Automatic Transmission (4-Speed 40RE)** The automatic transmission is smooth and reliable for daily driving, reducing wear compared to a manual. It handles stop-and-go traffic well, which is useful for work trucks used in urban or mixed environments.

5. **Availability of Parts and Mechanics** As a Nissan from the late 2000s, parts are still relatively accessible, and mechanics familiar with the platform are common. This makes repairs and maintenance more straightforward than on older or less common trucks.

6. **Fuel Economy for a Work Truck** While not exceptional (around **14 16 MPG combined**), it performs better than many full-size diesel trucks of the era, making it a practical choice for those who prioritize utility over fuel efficiency.

7. **Comfortable Cabin** The Frontier offers a decently sized cabin with decent sound insulation, making long drives more comfortable than some competitors.

8. **Resale Value (Compared to Similar Trucks)** While not a luxury truck, the Frontier holds its value better than some older Ford or Chevy work trucks, especially in the 2WD configuration.

---

### **Cons**

1. **Age and Mileage Concerns** A 2009 model is now **15 years old**, meaning it has likely accumulated significant mileage. Without thorough maintenance records, major issues (engine, transmission, suspension) could be lurking.

2. **Potential Transmission Issues** The **40RE automatic transmission** is generally reliable but can develop **slippage, rough shifting, or solenoid failures** over time. A pre-purchase inspection is critical to check for fluid leaks or unusual noises.

3. **Rust and Corrosion** Many older trucks, especially in snowy or salted regions, suffer from **frame rust or undercarriage corrosion**. Inspect the frame rails, wheel wells, and exhaust system closely.

4. **Electrical Problems** Nissan trucks from this era are known for **faulty wiring, blown fuses, and sensor failures**. Check for **random electrical gremlins** (e.g., dashboard lights, power windows, or infotainment issues).

5. **Interior Wear and Tear** The cabin may show signs of aging, such as **cracked plastic trim, worn seats, or failing electronics** (e.g., radio, climate control). If you plan to keep it long-term, budget for potential interior upgrades.

6. **Fuel Injection and Emissions Issues** The 3.1L V6 uses **fuel injectors and sensors** that can clog or fail over time, leading to **rough idling, poor acceleration, or check engine lights**. A **fuel system cleaning or injector replacement** may be needed.

7. **Suspension and Alignment Wear** After years of use, **shocks, struts, bushings, and ball joints** may be worn, leading to **rough rides or handling issues**. A **four-wheel alignment** is often due after significant mileage.

8. **Limited Modern Tech** Unlike newer trucks, the 2009 Frontier lacks **modern safety features** (blind-spot monitoring, backup cameras, advanced airbags) and **infotainment upgrades** (Apple CarPlay, Android Auto).

9. **Higher Maintenance Costs Over Time** While parts are available, **labor costs for older trucks can be higher** than for newer models, especially if specialized mechanics are required.

10. **Potential Engine Problems** Some 3.1L V6 engines develop **oil leaks (valve cover gasket, oil pan gasket), timing chain stretch, or head gasket issues** over time. A **compression test and oil leak inspection** are essential.

---

### **Conclusion**

The **2009 Nissan Frontier 3.1L V6 (31020ZL40C) with automatic transmission and King 2WD** is a **solid work truck** that excels in **towing, hauling, and off-road capability** for its class. It remains a **practical choice for those needing a reliable, heavy-duty truck** without the complexity of a diesel or the higher cost of a newer model.

However, **age-related wear and potential hidden issues** make it a **high-risk purchase if not thoroughly inspected**. Buyers should **prioritize maintenance records, perform a pre-purchase inspection (including engine, transmission, suspension, and electrical systems), and budget for potential repairs**.

If you **find a well-maintained example with low miles, no major rust, and a clean service history**, it can be a **great bargain** especially for those who prioritize **utility over luxury**. If you re unsure about the condition, **consider a newer used Frontier (2012 ) or a well-documented example** to mitigate risks.

---

### **Recommendation**

- You find a **low-mileage example (under 100,000 miles) with full service records**.

- The **transmission shifts smoothly, no leaks, and the engine runs clean**.

- You re **willing to invest in maintenance** (new shocks, suspension, and potential electrical fixes).

- You need a **towing/hauling truck** and don t require modern tech.

- The truck has **high miles (over 150,000 ), no service history, or visible rust**.

- The **transmission slips, shifts roughly, or has fluid leaks**.

- You **can t afford unexpected repairs** (engine, transmission, or electrical issues).

- You prefer **newer safety and convenience features**.

**Final Verdict:** This Frontier can be a **great value** for the right buyer, but **due diligence is critical**. If possible, **test drive it thoroughly, get a pre-purchase inspection, and negotiate based on findings**. For those who need a **no-frills, heavy-duty work truck**, it remains a **competitive option** just with the usual caveats of an older vehicle.

Details:

This part may have accessories that are attached and must be removed or switched for proper installation. Fitment: FRONTIER 09 AT; 6 cylinder, King Cab, 4x2, thru 9/08. FRONTIER 2009. Engine warranty is contingent upon installation of new intake manifold gaskets.

D Failure caused by or related to collisions, theft, vandalism any act of God. Warranty is not transferable. B Failure caused by towing a trailer unless your vehicle is rated the manufacturer for.

Transmissions: Replace the following with new parts: front pump and output shaft seals, pan gaskets filter. Clear all computer fault codes. Engine / Transmission. Shearing or breaking of teeth in a standard transmission is not warranted under any circumstances.

Warranty is valid to original purchaser only. All the above installation should be in accordance with manufacturer guidelines including proper quantity and fill levels of fluids any technical service bulletins updates. Adjust shiftier and kick down cables linkage if applicable. Manual transmissions follow the same procedure as above if applicable.

Flush or replace transmission cooler and lines. HASSLE-FREE: 12 MONTHS WARRANTY. Engine installations follow the procedures: Replace following parts if applicable: timing belt, water pump, thermostat, spark plugs, fluids, oil pan gasket, and filter. Warranty covers slippage, shifting failures and/or bearing noise.

The words un examined or unchecked on the delivery note/docket are not acceptable. 100% TESTED PARTS.

part #: 31020zl40c prices

• $899.99-$1950.90

specifications autotransmissionsgo:

• for models: 2wd, Frontier, King
• for makes: Nissan
• for years: 2009
• mpn: 31020zl40c
• model: Frontier
• part type: Transmission Cylinder
• conditions options: 4.0
• genuine oem: Yes
• ipn: 400-51042
• manufacturer warranty: 90 Day

offer autotransmissionsgo:

• best offers: True
• options: Ship-to-home
• sold: 0
• started: May 4, 2026
• quantity: 1
• availability: In Stock

seller autotransmissionsgo:

• city: Bloomfield, Iowa
• rating: 98.5%
• # reviews: 19612

general autotransmissionsgo:

• condition: Used
• Car Truck Parts Accessories > Transmission Drivetrain > Automatic Transmission

returns autotransmissionsgo:

• policy: Returns Accepted
• paid by: Seller
• time: 60 Days

shipping autotransmissionsgo:

• class: Freight
• service: Flat Rate Freight
• cost: $0.00
• type: Fixed

payments autotransmissionsgo:

• wallet: Apple-pay
• other
• credit card: Diners-club

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