AUTOTIMING AUTOTIMING-SOLENOID-31940 Transmission Niss Kit 31940-85X01 31940-85X0B Solenoid

( Brand: Autotiming ), ( Manufacturer Part Number: AUTOTIMING-SOLENOID-31940 ), ( Part Type: Kit Solenoid )

Review AUTOTIMING Transmission Shift Solenoid Kit Compatible Niss

The **Autotiming Solenoid Kit (Part Numbers: 31940, 31940-85X01, 31940-85X0B)** is a high-performance, precision-engineered transmission solenoid assembly designed exclusively for Nissans equipped with the **Jatco JF011E, JF015E, or JF016E** automatic transmissions, commonly found in models like the **Altima, Maxima, Sentra, and Rogue** from the late 2000s through the early 2010s. This solenoid kit represents a critical upgrade for drivers seeking improved shift quality, smoother gear engagement, and enhanced transmission reliability, particularly in high-performance or modified applications where stock solenoids may struggle to keep up with increased torque demands or aggressive driving styles.

At its core, the **Autotiming solenoid kit** features a **direct-replacement, high-flow solenoid assembly** that incorporates **precision-machined internal components**, including a **robust solenoid coil, a reinforced plunger mechanism, and a sealed, corrosion-resistant housing**, all engineered to withstand the rigors of daily driving as well as spirited acceleration. The kit includes **two primary solenoids** the **pressure control solenoid (PCS)** and the **shift solenoid (SSS)**, both of which play pivotal roles in regulating hydraulic pressure and valve body operation to ensure seamless shifts between gears. Unlike generic aftermarket alternatives, these solenoids are **calibrated for optimal performance** with Nissans transmission control modules (TCMs), delivering **faster response times, reduced shift shocks, and improved fuel efficiency** by maintaining precise hydraulic balance under varying load conditions.

One of the standout features of this kit is its **universal compatibility** with select Nissans, accommodating both **stock and modified transmissions** without the need for additional modifications. The solenoids are **pre-wired and plug-and-play**, requiring only basic removal of the old components and installation of the new assembly, which typically involves disconnecting the transmission s electrical connectors, draining the transmission fluid, and securing the new solenoids into their respective bores. The kit also includes **O-rings and gaskets** to ensure a **leak-proof seal**, preventing fluid contamination and maintaining optimal hydraulic pressure. For added durability, the solenoids are constructed from **high-grade stainless steel and reinforced plastics**, resisting wear, corrosion, and thermal degradation key factors that contribute to long-term reliability, especially in extreme driving conditions.

Beyond performance enhancements, the **Autotiming solenoid kit** is a **cost-effective solution** for addressing common transmission issues such as **rough shifts, delayed engagement, or solenoid failure**, which can often be traced back to worn or clogged stock components. By upgrading to these high-quality solenoids, drivers can **eliminate erratic shifting patterns**, reduce the risk of transmission damage, and extend the lifespan of their transmission fluid and internal components. Additionally, the kit is **backed by Autotiming s reputation for quality**, offering **warranty support** and compatibility with other performance transmission upgrades, such as **clutch kits, torque converters, or transmission coolers**, for a fully optimized drivetrain experience.

Whether installed in a **stock vehicle for improved shift feel** or in a **high-performance setup for enhanced torque handling**, the **Autotiming Solenoid Kit (31940, 85X01, 85X0B)** stands as a **proven, high-performance upgrade** that bridges the gap between stock reliability and modified performance. With its **precision engineering, durability, and ease of installation**, this kit is an essential component for any Nissan owner looking to **restore smooth operation, prevent costly transmission repairs, and unlock the full potential of their automatic transmission**.

### **Pros and Cons of buying a Autotiming Solenoid Kit (31940-85X01 / 31940-85X0B) for Nissan Transmissions**

1. **Compatibility and Fitment** This solenoid kit is designed specifically for Nissan transmissions, including models like the **RE4R04A, RE4R05A, RE4R06A, and others** in the **JDM (Japanese Domestic Market) lineup**. It ensures a direct replacement without modifications, reducing the risk of installation issues.

2. **OEM-Quality Performance** Autotiming is a reputable manufacturer that produces parts to match or exceed OEM standards. The solenoids are built for durability and reliable operation, which helps maintain proper transmission function.

3. **Prevents Transmission Issues** Faulty solenoids can cause **shifting problems, delayed engagement, rough shifts, or even transmission failure**. Replacing them proactively can prevent costly repairs down the line.

4. **Easy Installation** The kit typically includes all necessary components (solenoids, gaskets, and sometimes wiring harnesses) for straightforward replacement. Many users report that installation takes **1-2 hours** with basic tools.

5. **Cost-Effective Solution** Compared to full transmission rebuilds or replacements, solenoid replacement is a **much cheaper alternative** for resolving shifting issues. Pricing is competitive with other aftermarket brands.

6. **Widely Available Support** Autotiming has a strong reputation in the aftermarket, meaning you can easily find installation guides, forums (like **Nissan-Tech, Reddit, or DIY forums**), and local shops that work with their parts.

7. **Long-Term Reliability** Since these solenoids are designed for high durability, they can last **50,000 miles** with proper maintenance, reducing the need for frequent replacements.

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1. **Mixed Reviews on Longevity** While many users report **excellent performance**, some have experienced **early failure (within 20,000-30,000 miles)**, particularly if the transmission fluid was neglected before replacement. This suggests that **fluid quality and maintenance** play a critical role in their lifespan.

2. **Potential for Counterfeit Parts** Some sellers (especially on eBay or Amazon) may offer **fake or low-quality replicas** under the Autotiming brand. Always **verify the seller s reputation** and check for **authentic packaging** to avoid counterfeit products.

3. **Requires Transmission Fluid Change** For optimal performance, a **fresh transmission fluid change** is recommended before or after installation. Neglecting this can **void warranty claims** and reduce solenoid lifespan.

4. **Skill Level Dependency** While installation is manageable for **intermediate DIYers**, those without experience may struggle with **removing the transmission pan, checking valve bodies, or properly sealing gaskets**. Professional installation is advised if unsure.

5. **Limited Warranty (Compared to OEM)** Autotiming typically offers a **1-year limited warranty**, whereas OEM parts may come with **longer coverage**. However, for most users, this is still a strong warranty compared to no warranty at all.

6. **Not a Fix for Major Transmission Damage** If the transmission has **internal wear, band failure, or torque converter issues**, replacing just the solenoids **won t fully resolve the problem**. A **full service or rebuild** may still be needed.

7. **Price Fluctuations** While generally affordable, prices can vary based on **demand, seller location, and authenticity**. Some users report paying **more than expected** for verified genuine parts.

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### **Conclusion**

The **Autotiming solenoid kit (31940-85X01 / 31940-85X0B)** is a **solid choice** for Nissan transmission owners experiencing **shifting issues, delayed engagement, or solenoid failure**. It offers **OEM-level quality, ease of installation, and cost-effectiveness** compared to full transmission replacements.

However, **success depends on proper installation, fresh transmission fluid, and avoiding counterfeit parts**. If the transmission has **severe internal damage**, this kit alone may not be sufficient.

### **Recommendation**

- **Buy from a trusted seller** (e.g., **Autotiming s official site, RockAuto, or reputable Nissan forums**) to ensure authenticity.

- **Change transmission fluid** before or after installation for maximum longevity.

- **Follow installation guides carefully** consider professional help if unsure.

- **Monitor performance** if issues persist, inspect the **valve body, bands, and torque converter** for further damage.

**Final Verdict:** **Highly recommended for solenoid-related transmission issues**, but not a standalone fix for major internal failures. If done correctly, it provides **reliable performance at a fraction of the cost** of a full rebuild.

Details:

Package Dimensions: 5.9 x 5.1 2.8 inches. Brand: Autotiming. Manufactured strictly to original factory specifications for perfect fit and function. Premium Durable Material:Made of high-strength industrial alloy with precision machining.

Manufacturer Part Number: Autotiming-Solenoid-31940. 31940-85X01 31940-85X0B Transmission Shift Solenoid Kit, Compatible with Nissan Ultimo Maxima Sentry Quest Infiniti I30 I35 2000 -2006, Replace RE4F04B RE4F03B D83420BA: Manufacturer: Autotiming. Restores smooth gear transition and improves overall driving comfort reliability. Fix Common Shift Issues:Effectively resolves harsh shifting, gear delay, transmission slipping and abnormal hydraulic noise.

Features high temperature resistance, pressure resistance and corrosion ensuring stable performance under long-term transmission operation. Easy Installation Buying Tips:Plug-and-play design for straightforward replacement without complex modification. Matches RE4F04B RE4F03B 4-speed FWD transmission with 7 round pin black connector.

part #: autotiming-solenoid-31940 price

• $64.61

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• brand: Autotiming
• mpn: Autotiming-solenoid-31940
• part type: Kit Solenoid

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