CURT 2024044577 Helux Coil-Spring Gooseneck Pin Box, 3,900 lbs. Pin Weight, 20,000 lbs. CapacityCURT$1,885.95In Stock
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Purchase verification required. Refer to instruction sheet for pin weight measuring process
Allows for additional cargo space in the bed of your truck versus traditional 5th wheel towing
Made in USA with global materials
Finish: Black
Material: Carbon Steel
Shipping Weight: 200.000 lbs
The CURT Coil-Spring Gooseneck Pin Box is engineered for RV owners who demand more from their towing setup more ride comfort, more truck bed space, and more long-term durability. By utilizing a gooseneck connection, this pin box gives you full use of your truck bed without sacrificing performance or stability. At the heart of the system is CURTs proprietary coil and shock technology, designed to dramatically reduce the bumps, jolts, and vibrations that come with towing. Compared to traditional pin boxes, the Helux pin box cuts down on force to your RV frame and body by up to 30% compared to other gooseneck pin boxes. With the Helux, youll feel the difference right away. The automotive-grade coil spring absorbs road shock to deliver a smoother, quieter ride for both pets and passengers. And unlike airbag-style pin boxes, the Helux is virtually maintenance-free. No compressors. No adjustments. No break-in period. Just install it and tow. Built to handle serious loads, this pin box offers a 20,000-lb. gross trailer weight rating with a pin weight range from 2,450 to 4,300 lbs. The auto-latching coupler connects quickly to any standard 2-5/16 gooseneck ball, making hookups fast, easy, and secure. Its also built to last. The CURT Coil-Spring Gooseneck Pin Box features high-strength steel construction, a durable black powder coat finish, and has been rigorously tested to SAE J2638 standards for safety and reliability. Plus, its compatible with Rhino Box bolt patterns and approved for use on Lippert RV frames, so it wont void your manufacturer warranty. This Helux Pin Box is compatible with #23082, #23503, #23520, #23522, #23523, and #23546 CURT locks.
CURT offers a variety of high-quality trailer hitches and accessories for select vehicle models. Find the perfect fit for your towing needs at TowUniverse.
CURT, a Lippert brand, offers a complete line of towing products and is the leading manufacturer of custom-fit trailer hitches. We offer the broadest selection of custom-fit hitches, and each one is designed, welded, and coated in Wisconsin.
CURT is also a leader in flat towing products, as well as 5th wheel, gooseneck, and weight distribution hitches, ball mounts, electrical components, cargo solutions, and other towing accessories.
For everything from passenger cars and vans to full-size pickups and SUVs, CURT is 'The First Name in Towing Products®.'
Experts available to answer your questions
Call 888-634-9494Limited lifetime warranty (one-year finish, one-year parts)
The CURT Helux Gooseneck Pin Box is a fifth-wheel hitch coupler assembly that connects a 5th wheel trailer to a tow vehicle. It uses a ball-and-coupler mechanism with a locking latch, safety chains, and a cable release. The pin box is available in six weight-rated models (part numbers 2024044575 through 2024044579) designed to match the pin weight of your specific 5th wheel trailer.
You must determine your 5th wheel's pin weight before purchasing. The best method is to take your fully loaded 5th wheel (including all cargo, toys, and water tanks) to a certified scale such as CAT Scale. Weigh the tow vehicle and RV together, then weigh the tow vehicle alone, and subtract to find the pin weight. Alternatively, multiply your 5th wheel's GVWR by 22% (0.22) for an approximation. Match your pin weight to the chart: 1650–2144 lb (2024044575), 2145–2484 lb (2024044574), 2485–2984 lb (2024044576), 2985–3469 lb (2024044577), 3470–3964 lb (2024044578), or 3965–5000 lb (2024044579). Actual weight measurement is preferred over approximation.
Yes. The Gooseneck is designed to use a 2 5/16" ball only, as stated in the installation instructions.
Required tools are: SAE socket set, SAE wrenches, box-end wrench set, tape measure, safety glasses, air compressor, and a level. Proper tools will improve installation quality and reduce time required.
The kit includes: one gooseneck assembly, ten hex bolts (5/8"-11 x 1 3/4", grade 5), ten serrated-flange nuts (5/8"-11, grade 5), two safety chains, and one cable release. The manual states that new mounting hardware is included and the old hardware should not be reused.
A minimum of two to three people are required to help support the weight of the pin box (170 pounds) as it is being lifted and positioned. Alternatively, a forklift may be used to lift the Gooseneck into position.
Yes. Step 1 of the installation process requires you to level the RV front-to-back using the landing gear before removing the old pin box and installing the new Gooseneck.
No. The manual explicitly states: "The Gooseneck kit includes new mounting hardware. Do NOT reuse the mounting hardware from the previous pin box."
The Gooseneck height must be adjusted using the trailer bracket holes to ensure two critical conditions: (1) a level towing setup, and (2) a minimum clearance of 7 inches between the top of the truck bed and the underside of the front of the 5th wheel. The bottom of the Gooseneck coupler to the center of the first mounting hole is 15 ½", and each set of holes above is graduated in 2" increments, with the top mounting hole at 21 ½" from the bottom of the coupler. Adjustment of the Gooseneck mounting height, tow vehicle height, or suspension may be necessary to achieve a level towing condition.
Install five hex bolts and flange nuts on each side: three fasteners in the forward position and two fasteners in the rearward position, for a total of ten bolts and ten nuts.
Torque the mounting bolts to 120 ft-lb ± 5 ft-lb. Failure to properly torque the mounting bolts can result in failure, causing property damage, severe personal injury, or death.
The coupler lock is a padlock with a 2.5" lock pin length and 11/32" maximum pin diameter. It locks into a hole on the Gooseneck to secure the coupler latch in the locked position.
The Breakaway Switch Kit may be located on either the RV mounting bracket or the previous pin box. If it is installed on the previous pin box, uninstall it and install it per the manufacturer's recommendations. The manual does not provide specific installation instructions for the Breakaway Switch Kit itself.
A minimum clearance of 7 inches must be maintained between the truck bed rails and the underside of the front of the 5th wheel to avoid contact while hitching and turning. This clearance must be verified with the RV level.
Be mindful of pinch points while handling the Gooseneck. Any place with moving parts or where two parts come together can be a pinch point and cause serious physical damage. Designated pinch points are: the spring and shock areas, the coupler and locking mechanism, and the pivot point of the upper and lower jaw.
Safety chains and the cable release must be stowed to avoid catching on the tow vehicle. Property and personal damage could occur if they are not properly secured. The cable release can either be stowed in the hook or rest free from the cable release lever once the coupler latch has been closed.
Observe the Gooseneck and hitch ball area once the RV is loaded. The coupler latch must be in the locked position (forward position) before towing. If the latch is in the unlocked position, a failure to latch may result in severe property damage, serious personal injury, or death. Do not tow the RV with the coupler latch in the unlatched position.
Always check the Gooseneck and its components for damage or any loose nuts and bolts. Verify the RV pulls in a level condition before traveling. The coupler needs to be checked for grease and maintained regularly. Apply grease to the hitch ball and coupler ball socket to avoid galling of similar metals. There is a grease zerk in the Gooseneck coupler for this purpose.
To measure Gooseneck clearance: (A) With the tailgate down, measure from the ground to the bed of the tailgate. (B) Measure from the tow vehicle bed to the top of the hitch ball. (C) Add these two measurements together. (D) The measurement to the bottom of the coupler must be ≥2 inches. If necessary, lower the tow vehicle's tailgate to allow the Gooseneck to clear, but monitor clearance during hookups as some combinations have little or no clearance.
Before lowering the coupler onto the hitch ball, place the tow vehicle in PARK and set the parking brake. Back the tow vehicle slowly toward the RV and position the coupler directly over the hitch ball.
Connect the safety chains to the tow vehicle anchors after lowering the RV until the coupler automatically latches.
Before unlatching the coupler, park the 5th wheel and chock the tires firmly, front and rear. Place the tow vehicle in PARK and set the parking brake. Remove the coupler lock if installed. Disconnect the 7-way power plug, breakaway switch connection, and safety chains at the tow vehicle.
Pull the cable release toward the rear in the "hold open" position, locking it into the cable hook. Then extend the landing gear to lift the front of the 5th wheel until the Gooseneck clears the hitch ball. Release the cable release from the hook.
The Gooseneck fits any 5th wheel with a compatible pin weight. Six models are available: 1650–2144 lb (2024044575), 2145–2484 lb (2024044574), 2485–2984 lb (2024044576), 2985–3469 lb (2024044577), 3470–3964 lb (2024044578), or 3965–5000 lb (2024044579). Weigh your fully loaded 5th wheel at a certified scale to determine the correct model.
The manual does not mention drilling or any permanent modifications to the truck bed. Installation uses existing or new mounting holes on the RV's upper deck mounting brackets.
The pin box assembly weighs 170 pounds. A minimum of two people are required to support it during installation, or a forklift may be used.
Torque all mounting bolts to 120 ft-lb ± 5 ft-lb. Improper torque can cause failure and serious injury or death.
Maintain a minimum of 7 inches clearance between the truck bed rails and the underside of the front of the 5th wheel to avoid contact while hitching and turning.
No. Do not tow the RV with the coupler latch in the unlatched position. Verify the coupler latch is in the locked position before towing.
The manual recommends applying grease to the hitch ball and coupler ball socket to avoid galling of similar metals. A grease zerk is provided in the Gooseneck coupler for this purpose. Specific maintenance intervals are not provided.
Adjust the Gooseneck mounting height or hitch ball height accordingly. The 5th wheel should always be towed while level. Adjustment of the Gooseneck mounting height, tow vehicle height, or suspension may be necessary to accomplish a level towing condition.
Inspect the Gooseneck coil spring for condition and any possible damage. Be sure cargo is balanced from side to side and front to back.
Verify that the Gooseneck is securely attached to the 5th wheel. Check the condition of the coil spring and replace if damaged or broken. Look for damage on the shock or a disconnected shock; reconnect or replace if needed. Hitch mechanisms can also cause noise; verify that unwanted noise is not coming from the hitch itself. The hitch manufacturer can provide guidelines for this check.
Observe the Gooseneck and hitch ball area once the RV is loaded. The Gooseneck coupler must close with the coupler lever in the forward position. If it does not close, the hitch ball could have excessive wear. Apply grease to the hitch ball and coupler ball socket to avoid galling of similar metals. There is a grease zerk in the Gooseneck coupler for this purpose.
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