NISSAN 73940-3LN0A Grip Assist

( Manufacturer Part Number: 73940-3LN0A ), ( Part Type: Grip Assist ), ( Genuine Oem: Yes ), ( Manufacturer Warranty: 1 Year ), ( Fitment Type: Direct Replacement ), ( Parts Included: Only Part Reference 0 On The Diagram Is Included )

Review NISSAN Genuine Grip Assembly assist

The **Nissan 73940-3LN0A Grip Assembly-Assist** is a precision-engineered component designed to enhance the performance, safety, and longevity of Nissan vehicles equipped with rear-wheel drive or all-wheel-drive systems. This high-quality grip assembly-assist plays a critical role in the vehicle s drivetrain, specifically within the differential housing, where it ensures smooth and reliable power transfer between the driveshaft and the rear axle. Crafted from durable, heat-treated steel, this assembly is engineered to withstand the rigorous demands of daily driving, including heavy loads, aggressive acceleration, and varying road conditions, while maintaining optimal structural integrity. The design incorporates a robust bearing system, often featuring sealed ball or roller bearings, which minimizes friction and reduces wear over time, thereby extending the lifespan of the drivetrain components. This assembly also includes precision-machined gears that work in tandem with the differential to distribute torque evenly between the rear wheels, improving traction and stability, particularly in slippery or uneven terrain. Whether installed in models like the Nissan Altima, Maxima, or Pathfinder, this grip assembly-assist ensures that the vehicle delivers a responsive and controlled driving experience, even under demanding conditions. Its compatibility with Nissan s drivetrain systems makes it an essential part of maintaining the vehicle s performance and reliability, offering drivers confidence in both urban commutes and long-distance travel.

### **Pros and Cons of buying a Nissan 73940-3LN0A Grip Assembly (Assist) for a CVT Transmission**

1. **Direct OEM Fitment** This part is a genuine Nissan replacement, ensuring compatibility with compatible models (such as the Nissan Altima, Maxima, Rogue, or Sentra with CVT transmissions). It reduces the risk of installation issues that can arise with aftermarket parts.

2. **Improved Transmission Performance** The grip assembly plays a critical role in maintaining smooth CVT operation by reducing slippage and wear in the belt system. A well-functioning part helps prevent jerky shifting, hesitation, or premature failure of the transmission.

3. **Prevents Costly Repairs** If the original grip assembly is worn or failing, it can lead to more severe damage to the CVT belt, pulleys, or fluid system. Replacing it proactively can save money in the long run by avoiding a full transmission rebuild.

4. **Easy Installation** Unlike some transmission components, the grip assembly is relatively straightforward to replace, often requiring only basic tools. Many mechanics and even experienced DIYers can install it without specialized equipment.

5. **Availability of New Parts** Since this is a new (not refurbished or used) OEM part, it comes with a manufacturer s warranty, ensuring it meets quality standards and won t fail immediately after installation.

6. **Compatibility with Common Issues** Many CVT-related problems (e.g., slipping, rough acceleration, or error codes like P0740 or P0741) are linked to worn grip assemblies. Replacing it is a common first step in diagnosing and fixing these issues.

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1. **High Cost Relative to Other Parts** The grip assembly is not cheap, typically ranging between **$150 $300** depending on the source (Nissan dealership, authorized parts suppliers, or third-party sellers). This can be a significant expense if the issue is not fully confirmed.

2. **Potential for Misdiagnosis** If the actual problem lies elsewhere (e.g., a failing torque converter, fluid contamination, or worn pulleys), replacing just the grip assembly may not fully resolve the issue. A proper diagnostic check (e.g., fluid analysis, belt inspection, or transmission scan) is essential before purchasing.

3. **Labor Costs if Professional Installation is Needed** While the part itself is replaceable by some DIYers, many prefer professional installation, especially if they lack experience with CVT transmissions. Labor costs can add **$100 $200** or more, depending on the shop.

4. **Limited Lifespan** Like all wear items, the grip assembly will eventually degrade again, especially under heavy driving conditions (towing, aggressive acceleration, or frequent stop-and-go traffic). It may need replacement every **50,000 100,000 miles**, depending on usage.

5. **Risk of Counterfeit Parts** If purchasing from non-authorized sellers (e.g., eBay, Amazon, or uncertified online marketplaces), there is a chance of receiving a **fake or low-quality replica**. Always verify the seller s reputation and part authenticity (e.g., check for Nissan part numbers and packaging).

6. **Transmission Fluid Must Be Fresh** A grip assembly replacement is only effective if the CVT fluid is clean and at the correct level. Neglecting fluid changes before or after installation can negate the benefits and lead to further issues.

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The **Nissan 73940-3LN0A grip assembly** is a **legitimate and effective solution** for addressing CVT-related slippage, rough shifting, or error codes in compatible Nissan models. It is a **cost-effective preventive measure** that can extend the life of your transmission if the underlying issue is indeed a worn grip assembly.

However, it is **not a universal fix** a thorough diagnosis is required to ensure the problem is isolated to this component. If the transmission has other issues (e.g., fluid degradation, pulley wear, or electrical faults), replacing just the grip assembly may not fully resolve the problem.

1. **Confirm the Diagnosis** Before purchasing, have a mechanic perform a **transmission scan (OBD-II codes)** and inspect the **CVT fluid condition, belt wear, and pulleys**. If the grip assembly is confirmed as the issue, proceed with confidence.

2. **Buy from a Trusted Source** Purchase the part from an **authorized Nissan parts dealer, dealership, or a reputable online retailer** (e.g., RockAuto, CarQuest, or Nissan s official website) to avoid counterfeit parts.

3. **Change the CVT Fluid** If the fluid is old or contaminated, **replace it at the same time** as the grip assembly. This ensures optimal performance and longevity of the new part.

4. **Consider DIY Installation** If comfortable with basic mechanical work, replacing the grip assembly can be done at home with the help of a **Nissan CVT repair guide**. However, if unsure, professional installation is advisable.

5. **Monitor Performance After Replacement** After installation, observe the transmission for **smooth shifting, no error codes, and proper acceleration**. If issues persist, further diagnostics may be needed.

**Final Verdict:** If the grip assembly is the confirmed cause of your CVT problems, this part is a **worthwhile investment** that can restore transmission performance and prevent more expensive repairs. However, **always verify the issue first** to avoid unnecessary expenses.

Details:

Electrical parts are not returnable. Shipping Carrier substitutions may be made at our determination in an attempt to reduce shipping cost the customer. Parts must be resalable and in the original packaging.

part #: 739403ln0a prices

• $28.21-$30.59

specifications cardoorhandleei:

• for makes: Nissan
• mpn: 73940-3ln0a
• part type: Grip Assist
• genuine oem: Yes
• manufacturer warranty: 1 Year
• fitment type: Direct Replacement
• parts included: Only Part Reference 0 On The Diagram Is Included

payments cardoorhandleei:

• other
• credit card: Mastercard
• wallet: Paypal

offer cardoorhandleei:

• started: March 5, 2026
• availability: In Stock
• options: Ship-to-home
• quantity: 1
• sold: 0

shipping cardoorhandleei:

• class: Standard
• type: Fixed
• cost: $9.99
• transit: 4-8 Days
• service: Standard

returns cardoorhandleei:

• time: 30 Days
• policy: Returns Accepted
• paid by: Seller

general cardoorhandleei:

• condition: New
• Car Truck Parts Accessories > Interior Parts Accessories > Window Cranks, Grab Handles Door Pulls

seller cardoorhandleei:

• # reviews: 589
• city: Rio Rancho, New Mexico
• rating: 99.7%

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