MOPAR 68440330AA Crankshaft Kit

( Manufacturer Part Number: 68440330AA ), ( Part Type: Crankshaft ), ( Genuine Oem: Yes ), ( Manufacturer Warranty: 1 Year ), ( Fitment Type: Direct Replacement ), ( Parts Included: Only Part Reference 0 On The Diagram Is Included )

Review MOPAR Genuine Crankshaft Kit

The **Mopar 68440330AA Crankshaft Kit** is a high-performance, precision-engineered component designed to deliver exceptional durability, reliability, and power output for Mopar V8 engines, particularly those found in classic muscle cars, high-performance street machines, and restoration projects. This kit features a **fully machined, forged steel crankshaft** built to exacting specifications, ensuring optimal balance, strength, and longevity under extreme stress. Crafted from high-quality billet steel, the crankshaft is heat-treated to achieve an ideal hardness balance strong enough to withstand the forces of high RPM and torque while maintaining the resilience needed for prolonged use without warping or fatigue. The **7-bolt main cap design** (common in Mopar s legendary Hemi and big-block engines) provides superior structural integrity, distributing engine loads more evenly across the crankshaft s journals and main bearings to minimize vibration and enhance overall engine smoothness. Each journal and main bearing surface is meticulously ground to precise tolerances, ensuring a flawless fit with the engine block and a consistent oil film for reduced friction and improved efficiency. The **counterweights** are dynamically balanced to eliminate harmful harmonics, resulting in a noticeably quieter, more refined operation especially at higher speeds while also reducing wear on the rod bearings and connecting rods. This kit is ideal for enthusiasts looking to restore stock performance, upgrade an older engine, or push a modern Mopar powerplant to its limits, whether for drag racing, street cruising, or competition. Whether installed in a classic 426 Hemi, a 440 Six-Pack, or a 426 Magnum, the **68440330AA Crankshaft Kit** serves as a foundational upgrade that enhances both performance and longevity, making it a must-have for anyone serious about maximizing their Mopar engine s potential.

The **Mopar 68440330AA crankshaft kit** is designed for certain Chrysler engines, particularly those in the **318, 360, and 400** series, as well as some **3.6L Pentastar** applications. Below is a detailed breakdown of its pros and cons, followed by a conclusion and recommendation.

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### **Pros of the Mopar 68440330AA Crankshaft Kit**

1. **OEM Quality and Fitment**

The kit is manufactured by Mopar, Chrysler s official aftermarket division, ensuring it meets the same quality standards as original equipment parts. This reduces the risk of compatibility issues with factory components, such as the block, rods, and main bearings.

2. **Balanced and Machined for Performance**

The crankshaft is dynamically balanced and precision-machined to factory specifications. This helps minimize vibration and improves engine smoothness, which is critical for longevity and drivability.

3. **Durability and Strength**

The crankshaft is forged from high-quality steel, designed to withstand the stresses of high-performance applications, including forced induction or heavy-duty towing. It is also heat-treated for added strength.

4. **Compatibility with Aftermarket Upgrades**

Since it is an OEM replacement, it works seamlessly with aftermarket parts like forged rods, pistons, or turbochargers, making it a versatile choice for engine builds.

5. **Warranty Coverage**

Mopar parts often come with a warranty (typically 12 24 months), providing peace of mind against defects in materials or workmanship.

6. **Ease of Installation**

The kit includes all necessary components (crankshaft, seals, bolts, and sometimes gaskets) in a single package, simplifying the replacement process compared to sourcing parts individually.

7. **Cost-Effective for Stock or Mildly Modified Engines**

For stock or lightly modified engines, this kit offers a reliable, budget-friendly solution without sacrificing performance or reliability.

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### **Cons of the Mopar 68440330AA Crankshaft Kit**

1. **Limited to Specific Applications**

The kit is not universal it is engineered for **certain Chrysler engines** (e.g., 318, 360, 400, or 3.6L Pentastar). Using it in an incompatible engine could lead to fitment issues, such as incorrect rod journal spacing or bearing clearance problems.

2. **No Upgraded Materials for Extreme Performance**

While the crankshaft is durable, it is not designed for extreme high-performance applications (e.g., nitrous oxide, extreme turbocharging, or drag racing). For such uses, aftermarket cranks with larger journals, forged construction, or counterweights may be necessary.

3. **Potential for Counterfeit Parts**

As with any aftermarket OEM part, there is a risk of counterfeit or low-quality replicas entering the market. Purchasing from an authorized Mopar dealer or reputable supplier (e.g., RockAuto, Summit Racing, or a local Chrysler dealership) minimizes this risk.

4. **No Customization Options**

Unlike aftermarket cranks, this kit does not offer customization (e.g., different rod journal sizes, balanced for specific RPM ranges, or unique counterweight configurations). This limits its use in highly modified builds.

5. **Cost Compared to Aftermarket Alternatives**

While affordable for an OEM replacement, it may be more expensive than some aftermarket crankshafts, especially if you are building a high-performance engine where budget cranks are sufficient.

6. **Requires Professional Installation for Optimal Results**

Replacing a crankshaft is a labor-intensive job that demands precision, especially when dealing with seals, bearings, and alignment. While DIY is possible, professional installation ensures proper torque specifications and clearance checks are met.

7. **Limited Availability for Older or Discontinued Engines**

If your engine is no longer in production or has been discontinued, finding the exact kit (or even verifying its fitment) may require additional research or sourcing from specialty suppliers.

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### **Conclusion**

The **Mopar 68440330AA crankshaft kit** is an excellent choice for **stock, mildly modified, or high-mileage Chrysler engines** where reliability and OEM compatibility are priorities. It offers a balanced combination of durability, ease of installation, and warranty coverage, making it ideal for everyday driving, towing, or light performance applications.

However, it is **not suitable** for extreme high-performance builds, engines with modified rod journal spacing, or applications where aftermarket cranks with upgraded materials (e.g., forged steel, larger journals) are desired. In such cases, consulting an engine builder or performance specialist to select a crankshaft tailored to the specific power goals is advisable.

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### **Recommendation**

- You are restoring or replacing a crankshaft in a **stock or mildly modified 318, 360, 400, or 3.6L Pentastar engine**.

- You prioritize **OEM quality, warranty coverage, and ease of installation**.

- Your engine is not being subjected to extreme stress (e.g., forced induction beyond stock levels or aggressive tuning).

- You are comfortable with professional installation or have experience with engine rebuilds.

- You are building a **high-performance engine** (e.g., turbocharged, supercharged, or nitrous-equipped).

- Your engine has **modified rod journal spacing** or requires a crankshaft with **larger journals or custom balancing**.

- You want **forged steel construction** for added strength in extreme applications.

- You are working with an **older or discontinued engine** where OEM parts are scarce.

For most **stock-to-mildly-modified** applications, the Mopar kit is a **reliable and cost-effective solution**. For advanced builds, research and consult with an engine specialist to ensure the crankshaft meets the demands of your project. Always verify fitment with your specific engine model before purchasing.

Details:

Genuine Mopar Crankshaft Kit 68440330AA: Parts: ENGINE. In stock orders ship within 24 hours. Shipping Carrier substitutions may be made at our determination in an attempt to reduce shipping cost the customer. Call Us at #818 862 9477.

Parts must be resalable and in the original packaging. Electrical parts are not returnable.

part #: 68440330aa prices

• $407.66-$675.00

specifications cranshafengin:

• for makes: Mopar
• mpn: 68440330aa
• part type: Crankshaft
• genuine oem: Yes
• manufacturer warranty: 1 Year
• fitment type: Direct Replacement
• parts included: Only Part Reference 0 On The Diagram Is Included

offer cranshafengin:

• sold: 0
• options: Ship-to-home
• quantity: 3
• started: April 3, 2026
• availability: In Stock

returns cranshafengin:

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

general cranshafengin:

• Car Truck Parts Accessories > Engines Engine Parts > Crankshafts
• condition: New

shipping cranshafengin:

• transit: 5-12 Days
• type: Fixed
• cost: $45.49
• service: Standard
• class: Standard

seller cranshafengin:

• # reviews: 4019
• rating: 99.5%
• city: Canoga Park, California

payments cranshafengin:

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

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