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  1. 5th Wheel Hitch
  2. Demco
  3. 21000 lbs GTW
  4. Above Bed Rails
  5. Sliding Fifth Wheel
  6. Premium - Single-Hook Jaw
THIS ITEM IS NOT A FIT FOR
2004 Chrysler 300M
Demco

Demco Autoslide 5th Wheel Trailer Hitch for Dodge Ram - Single Jaw - Above Bed - 21,000 lbs

Part Number: DM39XV
In Stock
$2,499.90
5th Wheel Hitch
Not Confirmed to Fit

2004 Chrysler 300M

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No more getting in and out of your truck to mess around with a manual slider. This hitch slides automatically to give you 14" of additional clearance for tight turns whenever you need it. Custom brackets and base rails included. 1-800-940-8924 to order Demco 5th wheel hitch part number DM39XV or order online at etrailer.com. Free expert support on all Demco products. Great prices and Fastest Shipping for Demco Autoslide 5th Wheel Trailer Hitch for Dodge Ram - Single Jaw - Above Bed - 21,000 lbs. 5th Wheel Hitch reviews from real customers.
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Demco 5th Wheel Hitch - DM39XV

  • 21000 lbs GTW
  • Above Bed Rails
  • Demco
  • Sliding Fifth Wheel
  • Premium - Single-Hook Jaw
  • 15-1/4 - 18 Inch Tall
  • Double Pivot
  • 5250 lbs Vertical Load
  • 14 Inch Fore/Aft Travel

No more getting in and out of your truck to mess around with a manual slider. This hitch slides automatically to give you 14" of additional clearance for tight turns whenever you need it. Custom brackets and base rails included.


Features:

  • 5th-Wheel hitch mounts in your short-bed truck bed so you can tow your 5th-wheel trailer
  • Automatic slider provides clearance required for your short-bed pickup to turn safely at slow speeds
    • No more getting into and out of the truck to operate a manual slider
    • Head slides toward the tailgate when you turn and back toward the cab when you straighten out
    • Rack-and-pinion gears create smooth, controlled, automatic motion
  • Rotating hitch head turns up to 90 degrees with your trailer
    • Rotation creates the force that propels the automatic slider
    • Built-in brackets stabilize your pin box so the king pin won't rotate in the hitch - no need for a separate capture plate for standard pin boxes
  • Wraparound, single-piece jaw provides a secure connection
    • 360-Degree jaw-to-king-pin contact
    • Less rattle and more security than slide-bar jaws
  • 3/4" Thick, solid steel locking bar reinforces the connection of your coupled trailer
    • Automatically locks into place when the jaw closes
  • Double-pivot hitch head eases hookup and helps to limit chucking
    • Pivots front to back and side to side
  • 3 Height settings to fit your application
  • Cushioning polyurethane dampeners help reduce noise and absorb road shock
  • Spring-loaded handle with comfort grip allows for simple coupling
    • Tethered safety pin lets you secure the handle in the open or the closed position
  • Sturdy steel construction with rust-resistant black powder coat finish
    • Diamond-plate tread on hitch base adds unique styling
  • Simple installation with included base rails and installation kit
  • Made in the USA


Specs:

  • Designed for use on 6-1/2' truck beds
  • Fits standard pin boxes 12" - 14" wide
    • Locking plates (sold separately) are required for use with Glide Ride, Mor Ryde, Trailair Tri Glide, Trailair Flexair, Rota Flex, Lippert Road Armor, and 5th Airborne pin boxes
  • Gross towing weight: 21,000 lbs
  • Vertical load limit: 5,250 lbs
  • Travel: 14" front to back
  • Hitch height settings: 15-1/4", 16-1/2", and 18"
  • 5-Year limited warranty


Note: This fifth-wheel trailer hitch is not compatible with Sidewinder or Revolution king pins. Do not use any device that changes the pivot point of your trailer's king pin with this hitch.


Automatic Slider Makes Cornering Easy

Most often used on trucks with 6-1/2' beds, a slider helps to eliminate clearance problems during slow-speed turns. When you are towing a fifth-wheel trailer, your hitch must be situated on the cab side of your truck's rear axle. However, at slow speeds you can use a slider to slide the fifth-wheel hitch (and the trailer) toward your truck's tailgate and past the rear axle, creating enough space between the cab of your truck and the trailer to permit less-restricted turning.


Normally, you'd have to get out of your truck and pull a lever to release the slider before every turn, but what if there was an automatic system? Imagine having 14" of extra clearance while towing your fifth-wheel trailer. Now imagine having this without needing get out of the truck to move your slider. The Demco Autoslide makes this fantasy a reality. The Autoslide automatically glides back smoothly when you make a sharp turn so you can maneuver effortlessly around tight corners within campsites and parking lots.


Demco Hijacker Autoslide

The base of the Autoslide has a built-in rack-and-pinion gear system that operates automatically. As your truck turns, the pinion in the base also turns. This activates the rack gear, which causes the rotational force of the truck to be converted into the linear sliding action of the hitch. So, when your truck makes a sharp, slow-speed turn, the gears inside the Autoslide force the hitch head to slide down toward your truck's tailgate in a smooth, controlled motion. This way, any time that your truck turns more than 10 to 15 degrees, the Autoslide will ensure that there is enough clearance for your trailer to complete the turn as well, and it will do so without any jerking or binding.


In order for the rack-and-pinion assembly to function as designed, the pin box must be stabilized on the hitch head. Normally in a fifth-wheel hitch, the king pin moves inside of the hitch head so that the trailer can turn. With the Autoslide, the king pin remains fixed inside of the jaws of the hitch and it is the hitch head itself that turns. This is thanks to the capture brackets on the sides of the head that brace the pin box from both sides to hold it in place on top of the hitch head. This is done to ensure that there is enough resistance within the hitch when your truck turns to properly activate the rack-and-pinion gear mechanism.


Demco Hijacker Autoslide capture bracket

To stabilize your pin box on the hitch head, simply push the capture brackets up against your pin box once the trailer is coupled and tighten the outer bolts and the inner jam nuts. The Autoslide head and brackets will fit standard pin boxes that are between 12" and 14" wide. If you have a Glide Ride, Mor Ryde, Trailair Tri Glide, Rota Flex, Lippert Road Armor, or 5th Airborne pin box, you must install a special locking plate (sold separately) as well.


When you straighten your rig out again and your trailer moves back in line, the hitch head will rotate back to center and slide back toward the cab into the straight towing position.


Secure Wraparound Jaw with Locking Bar

Demco Hijacker Autoslide wraparound jaw and locking bar

The single-piece, strong wraparound jaw completely surrounds your trailer's king pin for 360 degrees of contact. This wraparound jaw provides a more secure connection than standard 2-piece jaws that close in on the king pin from the sides. The increased jaw-to-king-pin contact on the Autoslide offers tighter tolerances around the king pin, which minimizes both rattle and chucking, for a smooth, quiet ride.


A 3/4" solid steel locking bar spans the area in front of the jaw. This bar provides an added barrier of protection against accidental disconnection so you can have peace of mind that your trailer is secure. The locking bar is attached to the jaw and to the spring-loaded handle. The bar automatically locks when the jaw closes around your king pin.


Double-Pivot, Cushioned Hitch Head

The double pivoting, cushioned head improves your towing experience dramatically by helping to reduce jarring and unwanted noise. Built-in pins allow the hitch head to pivot back and forth and side to side. And hooking up is easy because the hitch head will automatically pivot to the proper angle when it comes into contact with your pin box.


Three polyurethane dampeners help to cushion the movement from the pivoting head and to reduce towing noise. Two of these dampeners are built into the head assembly to cushion the head's side-to-side pivoting. The third dampener cushions the back-and-forth motion and must be installed in the hitch prior to use. Installation of this third dampener is easy - simply press the dampener up into the pre-drilled hole underneath the hitch head.


Easy Installation

The Autoslide hitch is designed to mount to the included industry-standard base rails, which install in your truck bed and are anchored to the included custom brackets that attach to your vehicle's frame. The hitch comes pre-assembled for an easy installation. All you have to do is bolt on the side plates and attach the head to the hitch base.


The side plates have 2 functions. They contain the feet that fit into your above-bed rails, and they allow you to raise or lower the hitch head to better match your pin box height. After you choose your desired height setting, simply bolt the side plates to the hitch base with the included hardware. Then attach the base to the rails with the included safety pins.


Clearance Formula for Short Bed Trucks

Use the formula below to ensure there will be enough space between your truck cab and trailer when executing a 90-degree turn.


(A+B) - C = Clearance


A = Distance from the center of fifth-wheel hitch jaw to truck cab

B = Length of Travel (14")

C = Width of trailer divided by 2 (to get half)


For example: If the distance from the center of the hitch to the cab is 36", 36" + 14" = 50". If your fifth-wheel trailer is 84" wide, take half (42"), then plug in: 50" - 42" = 8" of clearance.


Note: At least 4 inches of clearance is recommended to safely execute a 90-degree turn.



8550035 Demco Autoslide 5th Wheel Trailer Hitch w/ Slider - Single Jaw - Above Bed - 21,000 lbs

6003 Demco Ultra Adapter Plates for Hijacker Auto Slide 5th Wheel Trailer Hitch

6071 Demco Bed Rails for High Jacker Premier Series Fifth Wheel Trailer Hitches

6107 Demco Hijacker Head Assembly for Auto Slide 5th Wheel Trailer Hitch - 21,000 lbs

8552016 Demco Custom Bracket Kit for High Jacker Premier Series Fifth Wheel Trailer Hitches

Installation Details DM39XV Installation instructionsAlternate Instructions DM39XV Installation instructions


California residents: click here


Video of Demco Autoslide 5th Wheel Trailer Hitch for Dodge Ram - Single Jaw - Above Bed - 21,000 lbs

Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.




Video Transcript for Demco Fifth Wheel Installation Kit DM8552016 Review

Today we're going to take a look at the Demco Hijacker Premier Series Custom Mounting Brackets for the fifth wheel above-bed base rail. This is a custom-fit part. It is designed to fit the 2002-2012 Dodge Ram and Ram 1500, 2500, and 3500 series trucks with either the six-foot bed or the eight-foot bed. Now I know on any custom-fit part, I like to recommend to go to our website, use our fit guide. Put in your year model vehicle and it will show if these will work for your application. These installation brackets mount beneath your truck bed, and they provide the attachment points for your fifth wheel rails. Now the base rails, we do sell separately on our website.

It's part number DM6071 and the rails will sit in you truck bed, and they allow the installation of the fifth wheel trailer hitch to your truck. These custom-fit brackets are designed to mount to existing holes in your vehicle's frame. If yo you can see, they're all labeled for what position they go in. This will help minimize drilling, reduces installation time, and it also is known to avoid known obstacles along your truck's frame. All these parts are a sturdy steel construction with a nice black powder-coat finish to help resist corrosion. All the hardware is included to install this.

A nice set of detailed instructions also. These parts are all made in the USA. That should do it for the review on the Demco Hijacker Premier Series Custom-Mounting Brackets for fifth wheel above bed base rails.

Ratings & Reviews

4.7

706 reviews
No more getting in and out of your truck to mess around with a manual slider. This hitch slides automatically to give you 14" of additional clearance for tight turns whenever you need it. Custom brackets and base rails included.

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  • Best Sliding Fifth Wheel Hitch Recommendation for 2017 Ram 3500 Short Bed with Factory Rail Kit
    For a slider hitch for your 2017 Ram 3500 with the factory fifth wheel rail kit the best option I can recommend is a Demco Hijacker Autoslide hitch like the part # DM8550035 which has a 21k capacity. I really like this hitch as it automatically slides back as you make tight turns so you never have to get out and mess with the slider mechanism. Then to fit this hitch to the factory rail kit of your truck you'll need the rail kit adapter part # DM6099 and you'll be set. I attached a review...
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  • Recommended Sliding 5th Wheel Hitch for a 2017 Ford F-250 w/ 5th Wheel Rails
    Hey Aaron, welcome back! Since your 2017 Ford F-250 has 5th wheel rails installed you've got a wide range of options. The Demco Autoslide 5th Wheel Trailer Hitch item # DM8550035 you were looking at would definitely work. This is the Cadillac of sliding hitches. It has a 21,000 lbs capacity, will give you 14" of travel for making tight turns, and it slides on its own. You don't have to get out of your truck to engage the slider. If you want a standard sliding 5th wheel hitch without the...
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  • Demco Hijacker Autoslide Compatibility with 2017 Ford F-250 Factory Rail System Holes/Pucks
    For your Demco Hijacker Autoslide, if you have the above bed rail version like the 18K # DM8550034 or the 21K # DM8550035, then you will be able to use the adapter for your factory puck system. This adapter for your 2017 Ford F-250 is the Reese Elite Series Underbed Rail Adapter for Standard 5th Wheel Trailer Hitches - 20,000 lbs # RP30156. If you want the hitch that will fit without an adapter, the # DM8550038 or # DM8550024 would be the options. You may also want to consider using...
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  • Autosliding 5th Wheel Hitch for a 2019 Ram 3500 with OEM Puck System
    The autosliding 5th wheel hitch we have for you to use on your 2019 Ram 3500 is the Demco Hijacker. This comes in both an 18K # DM8550034 and a 21K # DM8550035 weight rating and secures to your OEM puck system with the adapter rail kit # DM6099. The Hijacker is one of my favorite 5th wheel hitches because it not only has great cushioning for the head unit, but it also has a single-jaw system that is reinforced by a 3/4" steel bar to give you some peace of mind. All of this combined gives...
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  • Parts Needed To Install Demco Autoslide 21K Hitch In a 2024 Ford F-350
    Sorry Frank, I'm a little confused and think you may have put in the wrong number as I do not see anything coming up as a Demco 6170. If you are referring to the Head and Base Assembly # DM6107 then yes you will be able to install this into your 2024 Ford F-350. You will need either the Rail Kit # DM72GV along with the Side Plates # DM6003 if your truck did not come with the factory in bed connections. If you have the factory in bed mounting holes we have the Ford Side Plates # DM6033 that...
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  • Recommended Sliding Fifth Wheel Hitch For A 2018 Ram 3500 Towing Multiple 5th Wheel Trailers
    Since you have a short bed 2018 Ram 3500 you will most certainly need a sliding fifth wheel hitch to prevent the nose of the campers from taking out the cab of your Ram when you have to make a sharp turn. Since you'll be doing this a lot you'll want to spend the extra money and get the Demco Autoslide 5th Wheel Trailer Hitch w/ Slider # DM8550035. This hitch has an autoslide feature which will allow the head to automatically slide back as you turn so that you don't have to constantly get...
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  • How to Tell if 2018 Ford F-250 Has Puck System to use Demco Hijacker Autoslide
    While the best and most certain way to tell if your 2018 Ford F-250 has the puck system is to call your local Ford dealer with your VIN, it should be pretty easy to tell otherwise. If your bed looks like the accompanying photo - with four accessible holes (pucks) and a gooseneck in the middle - you have the puck system. You can also tell based on how your B&W Companion mounts. If you insert it into the pucks you have the B&W Companion OEM 5th Wheel Trailer Hitch with Slider for Ford Towing...
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  • More Clearance for Short Bed With Atwood AB72 Pin Box
    I can help you figure out how to get more turning clearance with your short bed truck. Due to the style of the Atwood pin box you have on your trailer the Sidewinder is not recommended to be used. An alternative to this would be a sliding hitch. A sliding hitch will give you turning clearance for your trailer just not the 90 degrees that the Sidewinder provides. I really like the Demco Hijacker AutoSlide's, # DM8550035, technology because you never have to get in or out of your bed...
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  • Will Andersen Ultimate Allow a 90 Degree Turn When Towing with a 2017 Ram 2500 6-1/2 Bed
    The Andersen Ultimate Connection # AM3200 has a 9" offset. I am not sure if it will allow you to make 90 degree turns with your 2017 Ram 2500 6-1/2' bed but this can simply be determined by measuring from the back of your cab to the middle of the space in-between your base rails (or the pucks). Once you know that simply add 9" for the offset and the subtract half of the width of your trailer. The formula looks likes this: (A + B) - C = Clearance A = Distance from center of fifth wheel...
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  • Can Trailair Flex Air # LC328492 Replace Lippert 1621HD Pin Box on a 2017 Jayco Seismic Wave 355W
    You are on the right track of choosing an upgrade for the Lippert pin box on your 2017 Jayco Seismic Wave 355W. Since the pin box is a 1621HD instead of a regular 1621 you need to go with a different pin box as the Curt Flex Air # LC328492 is only compatible as a 1621 replacement. If you like the Curt line then you can use the Curt Air Ride # LC158778. This is rated for 21,000 lbs and the only difference between this and the Flex Air is that the Flex Air has a pivoting head which further...
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  • 5th Wheel Hitch Options for a 2015 GMC Sierra 2500 Denali
    Since your 2015 GMC 2500 has the 6-1/2 foot bed you will want to go with a sliding 5th wheel hitch. There are a couple of different options that you can go with here. If you are wanting to go with a 5th wheel hitch that uses the standard base rails then I recommend going with the Curt A20 # C16541 along with Base Rails Kit # RP50066-58. This 5th wheel hitch is one of the best hitches that we currently carry due to the dual-jaw system and the pivoting head to help secure the king pin and...
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  • How to Tell If 2017 GMC Sierra 2500 6.5' Bed Can Tow Trailer with Fixed 5th Wheel Hitch
    Thanks for reaching out! The 22K Reese 5th Wheel Trailer Hitch RP30033 might work with the 6-1/2' bed on your 2017 GMC Sierra 2500 but we need to do a little math first. Here is the formula we need to use: (A + B) - C = Clearance A = Distance from center of fifth wheel hitch jaw to truck cab - (Just measure from the middle of in-between your base rails to the cab) B = Length of slider/offset/Sidewinder - (This would be 0 for you) C = Width of trailer divided by 2 (to get half) - (This...
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  • Could Above Bed Demco Hijacker Hitch Fit Same Rails and B and W Companion Hitch
    The B and W Companion hitch was designed to fit the underbed B and W gooseneck hitches and no a standard set of fifth wheel rails like it sounds like you have/were describing. The Patriot hitch from B and W is the hitch that normally fits that style of rails. If the rails you have are 22 inches apart that would indicate you have standard rail kit. The Demco Hijacker for above bed rails part # DM8550035 was designed to fit this type of rail and would work great. If you have something different...
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  • Fifth Wheel Hitch Recommendation for 2016 RAM 3500 Short Bed w/ Puck System Towing 2015 Cedar Creek
    Although many trailer manufacturers are now designing their trailers with the tapered fronts to be more aerodynamic and also to help increase turning clearance, our hitch manufacturers are still going to recommend using a hitch with a slider opposed to a stationary hitch. Using a slider helps to compensate for the reduced turning clearance on a short bed pickup. Since your 2016 Ram 3500 will be equipped with the puck system, I recommend going with the Curt Q24 5th Wheel Trailer Hitch with...
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  • Demco 21k Autoslide for 2012 Ram 3500
    Hey Rafael! I'm assuming you have the short bed and you also need the industry standard rails for your 2012 Ram 3500. The Demco Autoslide 5th Wheel Trailer Hitch for Dodge Ram # DM39XV comes with everything you need to add this to your truck. This includes the 21k Autoslide along with the base rails and custom bracket installation kit. If you need anything else feel free to reach out in the comments below.
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  • Parts Needed to Tow Fifth Wheel Trailer with 2006 Dodge Ram 2500
    Hey Clifton, everything you mentioned would be a really great towing setup for your 2006 Dodge Ram 2500 short bed! Demco fifth wheel hitch # DM39XV Rail kit with custom brackets # DM8552016-71 Curt Brake Controller # C93MV 5th Wheel 7-way # HM42137 Air Bag Compressor Kit # AL74000EZ Air Bag Kit # PB25FV
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