bing tracking image
  1. Fifth Wheel Hitch
  2. Demco
  3. Sliding Fifth Wheel
  4. 18000 lbs GTW
  5. Above Bed Rails
  6. Double Pivot
Demco Autoslide 5th Wheel Trailer Hitch w/ Slider - Single Jaw - Above Bed - 18,000 lbs

Demco Autoslide 5th Wheel Trailer Hitch w/ Slider - Single Jaw - Above Bed - 18,000 lbs

Item # DM8550034
Our Price: $1,725.00
You Save: $1,315.95
Fifth Wheel Hitch
This item qualifies for Free Truck Freight Shipping
Shipping Weight: 277 lbs
In Stock
zoom in icon
slider vertical icon
zoom out icon
Comment field cannot be left empty.
Name field cannot be left empty.

Thank you! Your comment has been submitted successfully. You should be able to view your question/comment here within a few days.

Error submitting comment. Please try again momentarily.

Product Images

In Use/Installed

Customer Photos

Need help with installation?
Locate installers near me
Product Expert Kathleen M

Is this right for you? Product Expert Kathleen M says:

Yes, if you:

  • Are a full-time RVer and don't use your truck bed for much else
  • Swap trailers with your friends and like being able to hook up without the need for extra capture plates
  • Have to make tight turns often and want to save yourself the hassle of getting out every time you need the hitch to slide

No, if you:

  • Have an eye for details and would be bothered by chipped paint that could eventually lead to rust
  • Plan on traveling on rough, uneven roads - the Autoslide's been known to bind in these conditions
  • Have a lifted truck or a RAM that sits high and need a hitch that sits lower in the bed
This hitch slides automatically as you drive to give you 14" of additional clearance for tight turns. A wraparound jaw provides a smooth ride and a locking bar offers added security. Pivoting head allows easy hook up and helps to limit chucking. 1-636-306-4830 to order Demco fifth wheel hitch part number DM8550034 or order online at Free expert support on all Demco products. Great prices and Fastest Shipping for Demco Autoslide 5th Wheel Trailer Hitch w/ Slider - Single Jaw - Above Bed - 18,000 lbs. Fifth Wheel Hitch reviews from real customers.
  • All Info
  • Reviews (464)
  • Q & A (0)
  • Photos
  • Why etrailer?

Demco Fifth Wheel Hitch - DM8550034

  • Sliding Fifth Wheel
  • 18000 lbs GTW
  • Demco
  • Above Bed Rails
  • Double Pivot
  • Premium - Single-Hook Jaw
  • 15-1/4 - 18 Inch Tall
  • 4500 lbs Vertical Load
  • 14 Inch Fore/Aft Travel

This hitch slides automatically as you drive to give you 14" of additional clearance for tight turns. A wraparound jaw provides a smooth ride and a locking bar offers added security. Pivoting head allows easy hook up and helps to limit chucking.


  • 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, non-cushioned 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
  • Simple installation with base rails and installation kit (sold separately)
    • Compatible with B&W, Curt, Demco, Draw-Tite, Hidden Hitch, Husky, Reese, and Valley above-bed base rails
    • Cannot be used with rails that are a part of a gooseneck adapter plate - base rails must be securely bolted to your truck
  • Made in the USA


  • 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 the following cushioned pin boxes: Glide Ride, Mor Ryde, Trailair Tri Glide, Trailair Flexair, Rota Flex, and 5th Airborne
  • Gross towing weight: 18,000 lbs
  • Vertical load limit: 4,500 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, 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 attach to universal above-bed base rails (sold separately). The hitch will fit most industry-standard rails, including those from B&W, Curt, Demco, Draw-Tite, Hidden Hitch, Husky, Reese, and Valley. 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" + 22" = 58". If your fifth-wheel trailer is 102" wide, take half (51"), then plug in: 58" - 51" = 7" of clearance.

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

6077 Demco High Jacker Head Assembly for Auto Slide 5th Wheel Trailer Hitch - 18,000 lbs

6003 Demco High Jacker Adapter Plates for Auto Slide 5th Wheel Trailer Hitch

Installation Details DM8550034 Installation instructionsAlternate Instructions DM8550034 Installation instructions

Customer Satisfaction Score:

Customer Reviews

Demco Autoslide 5th Wheel Trailer Hitch w/ Slider - Single Jaw - Above Bed - 18,000 lbs - DM8550034

Average Customer Rating:  4.7 out of 5 stars   (464 Customer Reviews)

This hitch slides automatically as you drive to give you 14" of additional clearance for tight turns. A wraparound jaw provides a smooth ride and a locking bar offers added security. Pivoting head allows easy hook up and helps to limit chucking.


wow what a great hitch . Got the no drill bed rails and the bolted rite up to my B&W gooseneck hitch . Ashley E did a great job answering all my questions . Only took a few days to get here too. Took me about 2 hours to install everything and if you have a short bed truck this is the only way to go .


Demco auto slide hitch works very well with my crew cab short bed Ram. Fits under my tonneau cover nicely. Trouble free thus far. Had to purchase a Demco plate for the camper to make the Rhino box hitch work. etrailer personnel were great in helping ensure I had the right products and kept me well informed of shipping dates.


This hitch is great! It relieves you from any worries of making a mistake when turning or backing a 5th wheel trailer on sharp corners. You will hear a small metalic noise that is a result of the rotating head having clearances enough to operate properly and I had a similar sound with my bumper pull trailer.


We looked at several hitches and we decided on the Demco auto slider. The key was it’s an AUTO slider. I can say after a year I’m glad we bought one that is this tough as well. So many of the roads are under construction and this hitch is a beast. In my first couple of long-distance pulls, we ran into some very bad roads in need of repair, and even though we felt like we came out of our seats the hitch was steady and performed awesomely. That’s what you want!!!


Excellent choice for a short bed Super Duty . Have towed several thousand miles with no issues. This is a heavy hitch , but that is what you get with a heavy duty Demco hitch . Plenty of room between trailer and truck when doing tight turns.


Haven't used yet but appears well built. Purchased with bed rails and capture plates. Packaging from etrailer was on a pallet and none of the 4 boxes had a blemish. Wish other companies would have this attention to detail.

OK. Its been a year since I purchased my Demco sliding 5th wheel hitch. Theres good and bad. The good is that I dont have to worry about breaking out the rear window of my truck when making a tight turn. The hitch is designed well with this respect. I can even turn on my truck bed camera and watch it in motion, which is pretty cool. The bad is that it is a little hard to hitch up. Since this hitch has capture plates, which makes the head of the hitch spin with the trailer hitch so it knows to slide towards back of truck, you have to have a pretty straight lineup between truck and trailer. If it wasnt for all of the cameras I have on my truck Id probably be a little frustrated. But as is, I do like the hitch. Just make sure you align truck with trailer exactly when hitching AND unhitching.
Hank - 03/03/2022


The Autoslide installation was easy (with help of another person). It was heavier than I expected, but manageable for two people. The included instructions were "spot on" and made the install easy for me. It also helped to look at the videos posted on their web site.
Once we installed the Autoslide in my 2021 RAM 2500 truck, the trip home with our new 5th wheel Toy Hauler went without any problems. I would recommend this Autoslide in ANY Short bed truck pulling a 5th wheel camper. After researching other available 5th Wheel hitches, I think this one is best to use. Easy to install, competitive price, and a good quality product.


My wife and I are full-time RVers, and have used this slider hitch from the get-go while traveling around seeing the country over the past year. We are happy with our purchase, which has proven to be both easy to hook up, adjust, and functions well, as advertised.

The only matter I think you may want to address are the thick plastic removable maintenance access covers which tend to bow, and the areas around the attachment holes have melted, in the hot weather. Perhaps instead using a light metal for the covers would be better solution.

We are very happy overall with this hitch, and plan to keep it . Thank you.


The demco adapter and fifth wheel have worked flawlessly on my GMC. I have never had to worry about my clearance with the auto slide fifth wheel and with a standard bed on my truck that is great. The height clearance is perfect on the bed with the various adjustments allowed on the fifth wheel. The installation was easy and the fifth wheel can be easily removed with an engine hoist. It takes about 10 minutes. I really like this product and would highly recommend it...


I have owned this unit for over a year now. Here are the pro's and cons that I have experienced.
Pro- I have pulled with this hitch in some really tight spaces in forward and reverse and still have the rear window in tact.
Con- Heavy, really heavy.
Pro- heavy duty,smooth riding, and double jaw lock makes a great connection.
Con- manufacturer recommends 1/8 of separation between the slides on the top of hitch. When backing upon 40' wheeler in some tight spaces it is hard to align without opening the slides a bit more. This is not he issue. Remembering to tighten them in the rush of leaving is the hard part.
Pro- once you are attached to your truck there is nothing more you need to worry about until you disconnect.
Con- If you are a weekender like me and use your truck for work the rest of the week, you will need at least one person to help lift in or out pre or post travel. Works pretty well with gantry crane.


Installed in my 2014 Silverado. This looks to be a very heavy-duty hitch that doesn't require a capture plate.

This hitch has worked well for me. It is now used in a 2018 GMC Sierra 2500. It is just tall enough that I can see it in my rearview mirror to make it easy to get lined up with the kingpin
Mike G - 09/15/2019


I love this hitch. Never having used an automatic slider and moving from a long bed to a short bed truck it took me a few attempts to get accustomed to backing up.
I would recommend this slider over any other brand. No capture plate needed either.


Tows great. I’m a first time fifth wheel owner. This made it easy. Be careful because this hitch is capable of angle that your trailer axles aren’t especially on a hard surface like asphalt or concrete. Over all very pleased. Be prepared to hoist this hitch in and out of your truck if you plan on removing it often. Probably weights closed to 400-500 lbs.


Quality is good. Installation was tricky without a lift. Some of the bed rail bolt holes (passenger side rear rail) where nearly impossible for a large hand to fit the nut on the bolt. Actually had to have my wife crawl under the truck and slide her hand in the brace to install the nut. Getting a decent size torque wrench into the space was also imposible. The front drivers side rail bracket required removing several vehicle lines and wires which was easy however the bracket covered the holes where the wires attached to the frame, so now they are hanging zip tied together. Hitch/ fifth wheel looks good quality but very heavy. Installed a 400 .lb capacity electric winch from harbor freight to lift the hitch. Firestone airbag helper springs was easy install but getting the exact straight cut on the hose end that hooks to the fill port was challenging to keep it from leaking
Videos were very helpful

Works Flawlessly
Glenn - 07/11/2021


Excellent product easy to install fit perfect and easy to hitch up well built exceeded my expectations.


Got my hitch installed today. Looks great but won't use it until next month. I'm really looking forward to towing with the auto slide hitch.

Still working great after a year. Its a heavy duty hitch built for years of trouble free service.
Jerry S - 10/22/2021


Unit is heavy and well built. Install was easy, just bolt on side plates on, drop the base on the adapter plate and pin it, put head assembly on and pin that, that's all there is to it. Looking forward to many years of towing with this unit.


Hitch was easy to install,easy to hook up to, and works flawlessly.


After a Year of use, this hitch has Performed Flawlessly. Is the perfect mindless solution, for towing with a short bed truck! Does need regular greasing of the head pivot pin!


Sliding hitch prevents my fifth wheel RV from contacting the cab allowing 90 degree turn.


Makes turning a 40 ft Grand Design Solitude much easier.


Demco fifth wheel hitch purchase and installation pictures.


We absolutely love our Demco Hijacker auto-slider hitch. We have a 6.5 ft bed, and a rather large 5th-wheel. I never have to give a single thought to unlocking the hitch and re-locking it before / after maneuvering. Everyone who sees it in action has that "jaw drop" reaction to it. Hooking up is very easy, and the engagement is VERY positive - you cannot miss getting it locked in place. Under tow, it is much more quiet than the previous one we used (loaner), and there is zero "lurching" or "chucking" as we experienced with the previous unit.

My only (minor) complaint is that I wish it wasn't quite so heavy, but it IS built like a tank. I probably could have gone with a lighter-duty unit for my specific 5th-wheel, but didn't want to have to replace the hitch if I ever upgraded to a heavier unit.

As for etrailer: everything I've purchased from them has shipped quickly, arrived (undamaged) on time, and has been of excellent quality. Thanks!

Still loving it. My only complaint definitely a 1st world problem! is that the unit takes up a lot of space in our bed when were not using the trailer. I solved that issue with a cheap chain hoist, attached to a beam in my garage. Now when we return from a trip and know were not going to use the 5th Wheel for a while, I just hook up the hoist and pull it out. Simple solution to my only issue with the Demco Hijacker.
JimP - 09/05/2019


This is a terrific hitch. Very rugged and quite positive in its operation. It is very heavy to install. I added some wheels to mine so I can roll it into place.

Show More Reviews

See what our Experts say about this Demco Fifth Wheel Hitch

  • Features of Demco Hijacker Autoslide 5th Wheel Trailer Hitch # DM8550034
    The Demco Hijacker Autoslide 5th wheel slider hitch # DM8550034 offers the advantage of automatic operation of the slide mechanism - no need to stop the truck, operate the slide, maneuver the trailer, lock the slide, etc. It also has the advantage of offering 14-inches of slider travel, more than many competing hitches which typically top out at 10-, 11- or 12-inches of travel. It also provides for three height settings: 15-1/4, 16-1/2, and 18-inches. The Demco Hijacker Autoslide also...
    view full answer...
  • Need More Turning Clearance when Towing 5th Wheel Trailer with 1999 Dodge Ram 2500 Short Bed
    The Atwood AB72 pin box is a telescoping box but there is no Sidewinder pin box that will fit it. So to get additional clearance you will need to use a hitch that has more travel than the Reese hitch you have now. I recommend the Demco HiJacker, # DM8550034, because it offers 14 inches of travel, more than any Reese slider, and it slides automatically so you won't have to get in and out of the truck to activate the sliding feature. This hitch fits in industry standard above the bed rails....
    view full answer...
  • Does the Demco Hijacker Auto-Slide Hitch Slide Back When Backing Up
    Yes, the auto-slide feature of the Demco Hijacker Autoslide 5th Wheel Trailer Hitch # DM8550034 that you referenced will function in forward and in reverse. What slides the hitch back is the angle of the head in relation to the base of the hitch. When turning the head it engages the gears on that side of the hitch which then slides it back. Check out the video I attached for more info.
    view full answer...
  • Hitch Height Dimension of Demco DM8550034 Hijacker Auto Slide 5th Wheel Hitch
    I can help you understand why there are differentiating measurements on the Demco Hijacker # DM8550034. Both specifications are correct per the manufacture's instructions; the unit has adjustments from 15.25, 16.5, and 18.0. See attached image. According to the video, Jeff states the measurements from the bottom of the truck bed, so his measurements take in account the height of the above the bed rails this unit will need to be installed on. In the video that the lowest hitch height...
    view full answer...
    Image 1 for
  • Height, Length, and Width of the Demco Hijacker 18k Autoslide 5th Wheel Trailer Hitch
    As far as height goes for the Demco HiJacker 5th wheel hitch # DM8550034 the minimum measured up from the base rails in the truck bed is 15-1/4 inches. You should not have a problem closing the Tonneau cover on your 2015 Chevy Silverado 3500HD depending on the type of cover it is. Should there be an issue you can easily unpin the head from the base and set it aside. The overall width is approximately 31 inches and the overall length is approximately 35 inches. I have included a picture...
    view full answer...
    Image 1 for
  • Can Sliding Fifth Wheel Hitch be Used on Long Bed Truck?
    Hello! Yes, you will be able to use your Demco Hijacker Autoslide # DM8550034 hitch with a long bed truck. Normally fixed fifth wheels are used with long beds but a sliding fifth wheel will be perfectly fine.
    view full answer...
  • Which Slider Hitch is Best Reese, Demco, or Pull Rite
    There are a lot of great options out there so any of the brands you mentioned are going to work well. And people are notoriously partial to what they already own so that's some of why everyone has the "best". For a slider hitch the automatic sliders are where it's at in my opinion. You don't have to get out and activate them or remember anything at all as it does the work for you. The things that the 18K Demco Hijacker # DM8550034 and the 18K SuperGlide have in common are that they both...
    view full answer...
  • Will Demco Hijacker Autoslide Fifth Wheel Hitch Fit Standard Above-Bed Rails on 2016 GMC Sierra?
    The Demco Hijacker Autoslide # DM8550034 will work with industry-standard, above-bed rails which is exactly what it sounds like you have; the Hijacker Autoslide also uses four pins to mount to the rails. As far as a locking plate that would only be necessary if your Lippert pin box was a Trailair version, which I assume you would have mentioned. For standard Lippert pin boxes you will not need a locking plate with your Demco Hijacker Autoslide # DM8550034. I've added links to a pair...
    view full answer...
  • Is there Space In Front of Factory Puck System in 2018 Chevy Silverado 2500 for Auxiliary Fuel Tank
    To ensure that the adapter does not encroach on the territory needed for the auxiliary fuel tank I recommend 4 inches in front of the pucks measured from the center of the forward pucks.
    view full answer...
  • Will I Have Enough Clearance to Tow a Fifth Wheel Trailer with 2015 Ram 2500 with Sleeper Shell
    Unfortunately, there's no way you're going to get enough turning clearance with only 36 inches of bed space with either a sliding hitch or Sidewinder. You won't even be able to install the fifth wheel hitch with the sleeper shell installed. The hitch would be too far back in the truck bed. In order to determine the amount of clearance you have you're going to need to do a little measuring and a little math. Once installed, a fifth wheel hitch can sit either directly over or about...
    view full answer...
  • Would a Slider Hitch Allow Clearance For Truck Bed Tool Box Around Corners
    A slider hitch would be a solution to allow your trailer to have the needed clearance to fit around your tool box. If I were in the market for a slider hitch I would easily pick the Demco Hijacker Autoslide part # DM8550034. This hitch will automatically slide back as you make tight turns to allow you the turning clearance you need. This hitch will slide back 14 inches so you might measure to make sure that would be enough clearance.
    view full answer...
  • Will Demco Hijacker Work with Air Ride Trailair Pin Box
    Yes, a Demco Hijacker can be used with the Trailair cushioned pin boxes. As long as it's not a FlexAir pin box you would be fine.
    view full answer...
  • How Straight Does Demco Hijacker Have to Be to to Connect/Disconnect
    The Demco Hijacker AutoSlides like the part # DM8550034 really only can be connected/disconnected when you are totally straight. I called my contact at Demco and asked about disconnecting and the angle it can be detached. They told me that there is a 10 degree angle that the trailer can be disconnected to with the Autoslide.
    view full answer...
  • Getting More Turning Clearance Between 2008 Ford F-250 Cab and 2016 Elks Ridge 5th Wheel Trailer
    A slider 5th wheel trailer hitch is one option to get more clearance when making tight turns. They are not just for backing up because you could be going backwards or forwards when turning and need the clearance. The other option is to replace the pin box on the 5th wheel trailer with a Sidewinder. A Sidewinder locks out the trailer at the hitch so the trailer instead pivots 22 inches further back on the Sidewinder turret. This 22 inches is much more clearance than a slider hitch. But...
    view full answer...
  • Can Sliding 5th Wheel Trailer Hitch be Slid Back All the Time for Regular Towing
    When using a slider 5th wheel trailer hitch you should only tow with it in the forward most position and not when slid back. The hitch should only be slid back when making tight maneuvers that require more clearance. If the trailer where slid back all the time it could cause the front of the truck to lift up a little. This will cause steering and braking problems as well as visibility issues. Also, the truck weight capacity behind the rear axle is less than with the hitch in the proper...
    view full answer...
  • Will Demco HiJacker 5th Wheel Hitch for Above Bed Rails Fit in Place of Pro Series Slider Hitch
    Yes, both your Pro Series hitch and the Demco HiJacker # DM8550034 will fit in industry standard above the bed rails that you have. The HiJacker is an auto-sliding hitch and it travels 14 inches which is more than the Pro Series travels. So not only will you not have to get out of the truck to activate the slide feature but you will also get a little more turning clearance! I have linked a review video of the HiJacker for you.
    view full answer...
  • Troubleshooting Difficult Connection of Demco Hijacker AutoSlide to Fifth Wheel Trailer
    The Demco Hijacker hitches like the part # DM8550034 are pretty particular about how straight your truck is relative to the trailer. Anytime we've seen issues with people having a hard time coupling with this hitch the problem has been that they aren't backing up totally parallel to the same direction as the trailer.
    view full answer...
  • Capture Plate Adjustment Procedure for Demco Hijacker Autoslide 5th Wheel Trailer Hitch DM8550034
    The silver capture plates on the Demco Hijacker Autoslide Hitch # DM8550034 should be adjusted after you hitch the trailer. You want to push the capture plates against both sides of the pin box then finger-tighten the inside jam nuts against the capture plate mount. Then tighten the outside jam nuts against the thick mounting plate. This is covered on page 3 of the instructions, which are linked for you. The procedure to uncouple the king pin jaws appear on page 7. Demco notes in step...
    view full answer...
    Image 1 for
  • Demco Autosliding 5th Wheel Hitch Head Leans to the Right
    The Demco autoslider, like part # DM8550034 has a double pivoting hitch head which help make hooking up your trailer easier, plus it helps to limit the back and forth chucking. If it is just slightly leaning to the right then that is normal as you can see from the attached picture where ours is leaning a little to the left. If the tilting is more severe than what you see in the attached picture please feel free to send me a picture of it so that I can pass it on to my contact at Demco...
    view full answer...
    Image 1 for
  • Difficulty Coupling the Demco Hijacker Autoslide 5th Wheel Trailer Hitch w/ Slider
    I am not exactly sure what you are referring to as the "glide plate" but if you are referring to the capture or locking plate that installs on the pin box then no, you cannot remove this as it prevents the kingpin from pivoting inside the hitch head. If you are having a hard time coupling the trailer you will want to refer to the steps I have listed for you below. It will be beneficial to you to make sure everything is properly greased and in working order. 1. Place wheel chock on each...
    view full answer...
  • 3-year-Old Jayco HT Eagle 5th Wheel Trailer has Started Chucking
    It sounds like you will need to check the hitch and the trailer pin box to see if anything has come loose, is damaged, or broken. It could be that the capture plates on the side of the HiJacker need to be adjusted and also make sure that the jaws will fully close around the trailer king pin. If not then follow the manual for the hitch for maintenance and lubrication. The dampening material on the pin box could be wearing down as well. I do not know if that can be replaced on those pin...
    view full answer...
  • Demco Autoslide Compatibility With Standard Lippert Pin Box
    The Demco Hijacker Autoslide 5th Wheel Trailer Hitch w/ Slider - Single Jaw - Above Bed - 18,000 lbs # DM8550034 does not need a capture plate for compatibility with a standard Lippert Pin box. The built in brackets of this hitch will stabilize your pin box so the king pin won't rotate in the hitch, so there is no need for a separate capture plate for standard, non-cushioned pin boxes. The head of the autoslide hitch will be the pivot for the trailer.
    view full answer...
  • Solution for Forgetting to Activate Fifth Wheel Slider In Tight Turns
    I have one solution for you, but there isn't an alert system available that's designed to alert you when you are in too tight of a turn with your trailer. A better option would be a fifth wheel hitch that slides automatically as you make tight turns giving you the clearance you need without requiring you to remember to activate it. For that the part # DM8550034 would be your best option. As you turn it slides back automatically.
    view full answer...
    Image 1 for
  • Can Demco Hijacker Autoslide 5th Wheel Trailer Hitch w/ Slider # DM8550034 Tow 15.5k Trailer
    If when your trailer is fully loaded it is under 18k the Demco Hijacker part # DM8550034 would easily tow it. Since you said the GVWR is 15.5k that shouldn't be a problem at all. As far as slider hitches go this is the best option around as it will automatically slide back as you make tight turns.
    view full answer...

< Previous
123. . .40

Do you have a question about this Fifth Wheel Hitch?

  • Why

    At we guarantee:
  • Real product know-how.

    We make sure that the products we sell are what we say they are, and that they work the way they are supposed to work. Get real advice from a real person who has the knowledge and expertise needed to solve your problem.
  • Most detailed, accurate fifth wheel hitch information available.

    Because we take providing accurate product information seriously, we take our own detailed product photos, demo videos and installation videos, as well as verify measurements, instructions, and vehicle fit information.
  • Installations, made easy.

    We love helping people and have the most highly-trained customer service, hands-on experience, step by step videos and installation instructions.
  • Fast shipping.

    Your order is automatically routed to get out of our warehouse and to your door as quickly as possible. Receive free shipping on orders over $99.
  • Personalized service for life.

    We provide one-on-one, personalized service from the ordering process through the life of your product.
  • Trusted since 1946.

    We've been serving customers since our parts store first opened in 1946 and continue to be recognized by our customers, our vendors and third parties for exceptional service.
  • Returns Policy

    Need to return an item? No problem. Please read our Returns Policy for more information.

Info for this part was:

Employee Joe V
Installed by:
Joe V
Employee Jeff D
Installed by:
Jeff D
Employee Mike L
Expert Research:
Mike L
Employee Michael H
Expert Research:
Michael H
Employee Jameson C
Expert Research:
Jameson C
Employee John H
Expert Research:
John H
Employee Adam R
Expert Research:
Adam R
Employee Jeffrey L
Expert Research:
Jeffrey L
Employee Victoria B
Expert Research:
Victoria B
Employee Andrew K
Video by:
Andrew K
Employee Michael B
Video by:
Michael B
Employee Lindsey S
Edited by:
Lindsey S
Employee Joshua S
Video Edited:
Joshua S
Employee Jacob T
Video Edited:
Jacob T
Employee Dustin K
Video Edited:
Dustin K
Employee Chris R
Video Edited:
Chris R
Employee Laura H
Updated by:
Laura H
Employee Wilson B
Updated by:
Wilson B
Employee Amanda M
Updated by:
Amanda M
Employee Kristina F
Updated by:
Kristina F
Employee Chelsea B
Written by:
Chelsea B
Employee Shane H
Test Fit:
Shane H
Employee Ryan G
Test Fit:
Ryan G
Employee Adam E
Test Fit:
Adam E

At we provide the best information available about the products we sell. We take the quality of our information seriously so that you can get the right part the first time. Let us know if anything is missing or if you have any questions.

Product Experts Available Now!
Call 1-636-306-4830