Np231 Vs Np242

The New Process Gear 231 and the New Process Gear 242 are two widely used transfer cases in vehicles, and they have distinct features that make each ideal for certain driving conditions. In essence, the NP231 is a part-time, chain-driven transfer case commonly used in Jeeps, while the NP242, also known as the Select-Trac, is a full-time four-wheel-drive system that also comes with a part-time mode. Let’s delve deeper into both options to understand which one could be ideal for your specific requirements.

Understanding the NP231

Developed by New Process Gear, the NP231 is a sturdy and reliable transfer case widely used in many Jeep vehicles. It is recognized for its versatility in handling different terrain and weather conditions. This part-time, chain-driven transfer case has been a standard feature in various Jeep models since 1988, including the Cherokee, Grand Cherokee, Wrangler, and Comanche.

Features of NP231

The NP231 transfer case offers a 2.72-to-1 low range that can help you navigate through tricky terrains and off-road conditions with ease. The gear-driven planetary reduction and the straight-cut gears make it a resilient transfer case that can handle heavy loads without the risk of gear breakage. Also, it comes with a slip yoke located at the tail-shaft.

Strengths and Weaknesses of NP231

While the NP231 is a robust transfer case that offers excellent performance in off-road situations, every coin has two sides. The strengths of the NP231 include its widely available parts, making it easy for you to replace or upgrade the system. Also, thanks to its chain drive, it also offers smooth and quiet operation during 4WD engagement.

However, on the flip side, NP231 comes with its share of drawbacks. The presence of a slip yoke at the tail-shaft increases the risk of drive-train failure under extreme stress, especially when executing high articulation off-road maneuvers. Therefore, while the NP231 transfer case is a great choice for off-road enthusiasts, it may not be the best for high-speed, full-time 4WD operation.

Understanding the NP242

On the other hand, we have the NP242, also known as the Select-Trac. This full-time transfer case offers both a full-time four-wheel-drive system and a part-time mode, making it a flexible choice for different driving requirements.

Features of NP242

The NP242 performs excellently in loose gravel, icy roads, and during torrential downpours, thanks to its full-time 4WD system. It also allows you to switch to the part-time mode for more demanding off-road conditions. The 2.72-to-1 low range is identical to the NP231, which maintains the flexibility to handle different terrains.

Strengths and Weaknesses of NP242

Admired for its versatility, the major strength of the NP242 transfer case is its full-time four-wheel-drive operation. This feature allows for impressive handling in slippery conditions without causing excessive wear and tear on the tires and drive-train components.

Despite its benefits, the NP242 also has its share of downsides. Parts for the NP242 could be harder to find and more expensive, as it’s not as common as the NP231. Moreover, being slightly larger and heavier, it might reduce the vehicle’s ground clearance slightly.

Frequently Asked Questions

Q. Can I Switch from NP231 to NP242?

Yes, you can switch from an NP231 to an NP242. However, this requires precise work and some technical know-how. You also need to consider the compatibility of your vehicle with the new transfer case.

Q. Which is Better for Off-roading, NP231, or NP242?

While both transfer cases have their strengths, the NP231 is generally better suited for off-roading due to its ruggedness and durability. However, if you frequently drive in icy or wet conditions, the full-time 4WD feature of the NP242 might be a better fit.

Final Thoughts

Deciding between the NP231 and the NP242 mostly depends on your driving habits and the conditions you commonly drive in. Both transfer cases have their unique strengths. If your journeys largely consist of off-road adventures, the NP231 might be a more fitting choice given its impressive durability. However, for those who encounter more slick and challenging road conditions, the full-time 4WD feature of the NP242 could prove useful. It’s about finding a balance between your needs and the capabilities of the transfer cases. Above all, remember that both the NP231 and the NP242 are proven systems that will undoubtedly enhance your vehicle’s performance.