SKYJACKER J40F Sky Leaf Springs

( Brand: Skyjacker ), ( Manufacturer Part Number: J40F ), ( Manufacturer Warranty: 1 Year Manufacturer Warranty ), ( Authorized Dealer: Yes ), ( Legal Disclaimer: Your Local Laws Before Purchasing ), ( Photo Disclaimer: For Reference Only, See Item Details ), ( Type: Suspension, Springs And Related Components )

Review SKYJACKER Sky Leaf Springs

The Skyjacker J40F Sky Leaf Springs are a high-performance suspension upgrade designed for 4x4 vehicles with a 4-inch lift. These springs are engineered to provide superior load support and improved ride quality compared to the stock springs.

Each spring is manufactured using heavy-duty, chrome-silicon alloy steel, ensuring durability and strength. The J40F springs are also heat-treated for added toughness and resistance to fatigue. The spring rate is specifically calibrated for vehicles with a 4-inch lift, ensuring proper vehicle height and stability.

The J40F Sky Leaf Springs feature a progressive design, which allows for better control of the vehicle's suspension during off-road conditions. This design also helps to reduce harshness and improve ride comfort on the highway. The springs are also designed to work seamlessly with other Skyjacker suspension components, such as shocks and coil converters.

The J40F Sky Leaf Springs come in a set of four, and are easy to install with standard hand tools. The springs are also powder-coated for added protection against the elements, ensuring a long-lasting and attractive appearance.

These springs are specifically designed for vehicles with a solid front axle and are not recommended for vehicles with independent front suspension. It is important to note that installing lift springs may require additional modifications to the vehicle, such as adjusting the brake lines and steering components.

In summary, the Skyjacker J40F Sky Leaf Springs are a high-quality, heavy-duty suspension upgrade for 4x4 vehicles with a 4-inch lift. These springs provide superior load support, improved ride quality, and durability, making them an excellent choice for off-road enthusiasts and overland adventurers.

Skyjacker J40F sky leaf springs are aftermarket suspension components designed to provide improved off-road performance for vehicles. Here are some pros and cons of buying these springs:

1. Enhanced off-road capability: Skyjacker J40F springs are specifically designed to provide superior off-road performance by increasing ground clearance and improving suspension articulation.

2. Durability: These springs are made from high-quality materials and are built to withstand the rigors of off-road driving. They are also designed to last longer than OEM springs.

3. Improved ride quality: Though these springs are designed primarily for off-road use, they can also provide improved ride quality on the highway by reducing body roll and improving handling.

1. Cost: Skyjacker J40F springs can be more expensive than OEM springs. This may be a consideration for those on a budget.

2. Installation: Installing aftermarket springs can be a complex process that requires specialized tools and skills. It may be necessary to hire a professional to install these springs.

3. Compatibility: These springs may not be compatible with all vehicle makes and models. It is important to verify that they will fit your specific vehicle before making a purchase.

In conclusion, Skyjacker J40F sky leaf springs offer improved off-road performance, durability, and potentially improved ride quality. However, they come with a higher cost, installation complexity, and compatibility considerations. If you are an avid off-roader and prioritize off-road performance, these springs may be worth the investment. However, if you are on a budget or prefer a more straightforward suspension upgrade, you may want to consider other options. Ultimately, it is important to weigh the pros and cons carefully before making a purchase.

Details:

This shot-preening compresses the surface of steel thereby increasing tensile strength spring. Soft ride R springs use bolt spring clips, eliminating friction. Skyjacker R Soft ride R springs taper over the entire length of fits Leaf creating more flex at ends. Skyjacker 3.5-4 SR FR SPR 76-86 CJ,S, Soft ride R springs American steel and the individual leafs of each spring are shot-preened with hard pellet's at very high velocities.

This tapering distributes loads more evenly over a greater area and reduces the tendency for one fits Leaf to dig into above it. Without this shot-preening procedure, the maximum wheel travel and ride quality could not be achieved without sacrificing life of spring. Other spring designs use the cinch bend clips which tightly over leafs causing binding and friction.

part #: j40f prices

• $164.35-$377.60

specifications coilspringi:

• brand: Skyjacker
• mpn: J40f
• manufacturer warranty: 1 Year Manufacturer Warranty
• authorized dealer: Yes
• legal disclaimer: Your Local Laws Before Purchasing
• photo disclaimer: For Reference Only, See Item Details
• type: Suspension, Springs And Related Components

offer coilspringi:

• quantity: 1
• availability: In Stock
• options: Ship-to-home
• started: June 8, 2025
• sold: 0

payments coilspringi:

• other
• wallet: Apple-pay
• credit card: Mastercard

general coilspringi:

• Car Truck Parts Accessories > Steering Suspension > Leaf Coil Springs
• condition: New

seller coilspringi:

• # reviews: 175955
• city: Cedar Park, Texas
• rating: 97.8%

returns coilspringi:

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

shipping coilspringi:

• transit: 4-8 Days
• cost: $0.00
• type: Fixed
• service: Expedited, Standard
• class: Expedited, Standard

Skyjacker J40F Is Similar To:

• Jc60f Skyjacker Lift Springs Coil-style (57.1% similar) I have a set of Skyjacker JC60F 6 inch lift coil springs for jeep Cherokee JX. These are regarded as the best coil springs in keeping world for spring rate. The paint on these were chipping, I cleaned them up and painted a metallic silver view pictures. Please verify your application before purchase...(October 29th, 2017)
• R25 Skyjacker Softride Front Coil Springs 803696218946 (47.1% similar) Skyjacker R25 soft ride front coil springs SPRINGS2013-14 ram DIESEL4WD2-2...(October 10th, 2018)
• Skyjc45f Skyjacker Suspension Softride Front Coil Springs 803696210674 (41.6% similar) About Skyjacker for over 40 years has proven to be an innovator in the suspension market. These new coils are engineered to maintain the original ride quality as closely possible while having key features for off-road durability. These coils are ideal when ride quality is your peak concern. Quantity...(February 27th, 2019)
• J40rs Skyjacker Softride Leaf Spring Fits Scrambler 803696144252 (50.5% similar) This shot-preening compresses the surface of the steel thereby increasing the tensile strength of the spring. Without this shot-preening procedure, the maximum wheel travel and ride quality could not be achieved without sacrificing the life of the spring. The Skyjacker J40RS is in new condition...(December 17th, 2021)
• Cr35s Skyjacker Softride Leaf Spring 803696121550 (57.5% similar) Soft ride leaf spring; lift height 5 in. 5.5 in.; single;. The Skyjacker CR35S is in new condition...(December 28th, 2021)
• Cr14s Skyjacker Leaf Rear 803696121390 (46.4% similar) This shot-preening compresses the surface of the steel thereby increasing the tensile strength of the spring. Without this shot-preening procedure, the maximum wheel travel and ride quality could not be achieved without sacrificing the life of the spring. The Skyjacker CR14S is in new condition...(January 1st, 2022)
• F940s Skyjacker Softride Leaf Spring (68.7% similar) Skyjacker F940S. This shot-preening compresses the surface of the steel thereby increasing the tensile strength of the spring. Without this shot-preening procedure, the maximum wheel travel and ride quality could not be achieved without sacrificing the life of the spring. The Skyjacker F940S is in ...(January 2nd, 2022)
• L122786 Skyjacker Softride Rear Leaf Spring For Jeep 743593563100 (47.9% similar) The Skyjacker L122786 is in new condition...(January 2nd, 2022)
• Dr76s Skyjacker Softride Leaf Spring Fits Ram (63.2% similar) Skyjacker DR76S. This shot-preening compresses the surface of the steel thereby increasing the tensile strength of the spring. Without this shot-preening procedure, the maximum wheel travel and ride quality could not be achieved without sacrificing the life of the spring. The Skyjacker DR76S is in ...(January 17th, 2022)
• J40rsb Skyjacker Softride Leaf Spring Fits Scrambler (57.8% similar) Mpn: J40RSB. This shot-preening compresses the surface of the steel thereby increasing the tensile strength of the spring. Without this shot-preening procedure, the maximum wheel travel and ride quality could not be achieved without sacrificing the life of the spring. New condition...(January 24th, 2022)
• F860s Skyjacker Leaf Spring 803696129587 (59.2% similar) Part #: F860S. This shot-preening compresses the surface of the steel thereby increasing the tensile strength of the spring. Without this shot-preening procedure, the maximum wheel travel and ride quality could not be achieved without sacrificing the life of the spring. New condition...(February 10th, 2022)