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  1. 5th Wheel Hitch
  2. Demco
  3. Above Bed Rails
  4. Sliding Fifth Wheel
  5. 13000 lbs GTW
  6. Premium - Single-Hook Jaw
Demco Autoslide 5th Wheel Trailer Hitch w/ Slider - Single Jaw - Above Bed - 13,000 lbs
Demco

Demco Autoslide 5th Wheel Trailer Hitch w/ Slider - Single Jaw - Above Bed - 13,000 lbs

Part Number: DM8550040
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$2,025.00
Retail:$2,411.00
You Save: $386.00
5th Wheel Hitch
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Hitch slides automatically as you drive to give you 22-1/2" 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. 1-800-940-8924 to order Demco 5th wheel hitch part number DM8550040 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 w/ Slider - Single Jaw - Above Bed - 13,000 lbs. 5th Wheel Hitch reviews from real customers.
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Demco 5th Wheel Hitch - DM8550040

  • Above Bed Rails
  • Sliding Fifth Wheel
  • Demco
  • 13000 lbs GTW
  • Premium - Single-Hook Jaw
  • 15-1/4 - 18 Inch Tall
  • Double Pivot
  • 3250 lbs Vertical Load
  • 22-1/2 Inch Fore/Aft Travel

Hitch slides automatically as you drive to give you 22-1/2" 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.


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 safety 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
    • Roller-and-guide assembly creates smooth and controlled movement
  • 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
  • 2 Separate tracks allow for up to 2-3/4" of side-to-side clearance to keep pin box from hitting bed rails
  • 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


Specs:

  • Designed for use on 5-1/2' and 6' 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, Lippert Road Armor, and 5th Airborne
  • Gross towing weight: 13,000 lbs
  • Vertical load limit: 3,250 lbs
  • Travel: 22-1/2" 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

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 22-1/2" 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.


The Autoslide has a built-in roller-and-guide assembly that allows for smooth, controlled, and automatic movement. As your truck turns, this assembly also turns. When the assembly turns, an arm in the base of the hitch moves down 1 of 2 tracks in the interior of the base. This action causes the head to be pushed down one of the exterior tracks in the base. So, when your truck makes a sharp, slow-speed turn, the roller-and guide assembly inside the Autoslide forces 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 roller-and-guide assembly to function as designed, the pin box must be stabilized on the hitch head. Normally in a 5th-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.


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 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 (22-1/2")

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.



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

6330 Demco High Jacker Head Assembly for Auto Slide 5th Wheel Trailer Hitch - 13,000 lbs

Installation Details DM8550040 Installation instructions



Customer Satisfaction Score:


Customer Reviews

Demco Autoslide 5th Wheel Trailer Hitch w/ Slider - Single Jaw - Above Bed - 13,000 lbs - DM8550040

Average Customer Rating:  4.7 out of 5 stars   (625 Customer Reviews)

Hitch slides automatically as you drive to give you 22-1/2" 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.

by:

Love it works great

Rod

7/6/2022

It works Great



by:

Wow, where to begin. I can't imagine towing a 5th wheel trailer in a shorter bed truck without an autoslide setup. After the initial install I noted on the 2nd(?) trip a clunking noise during acceleration after a stop - a couple emails back and forth with Demco support, as well as a quick phone call, and it was all sorted out (user error) with no further issues - Thank you Demco!
I tow a short & light Jayco 5th wheel with a 1/2 ton shortbed and having the ability to drive, turn, and park the camper without having to get out of the truck to manually engage or disengage a slide on the hitch has made for much more relaxing weekends away. The Hijacker autoslide gives PLENTY of space between the camper and cab and I've never had to worry, but I did my homework and ran the numbers well before I purchased my hitch so I wasn't surprised.
I would say the only downside for me would be the weight and bulkiness of the hitch. Not having the means to easily remove and store it between trips, the hitch is forced to live in the bed of the truck right now, but I did know about the weight going into the purchase.
All in all, for the peace of mind the Demco autoslide gives me, I'd spend the money all over again.



by:

Hitch works great, my truck has a 5’7” box, I can back up turning 90 degrees if I need to. It’s very important that your pretty straight when you unhook or you can’t hookup. You have to be more accurate when hookup. The first few times it seemed like it was going to be a hassle, you just have to pay a little more attention. Hitch is worth it



by:

Your team was very helpful getting me the hitch that I needed, and it arrived a little sooner than expected. In fact my truck is still in the repair shop for the damage caused by the other hitch, so I have not installed the new one as of yet.
Thanks for all your help.



by:

Everyone that I spoke to on the phone were very helpful. I haven't hooked up my hitch yet but I like what I see so far.

Kevin

10/22/2021

its been great. love it



by:

everything i have bought i am very happy with and will buy again.



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by:

Worked out great. I used the hitch for my camper right after I installed it. However, I did break one of the bolts when installing it, which is OK. I just switched to grade 8 bolts which is better anyways. I love the fact that Demco hitch unlocks when you pull the lever regardless of weight on it. Compared to my previous Mopar hitch you had to get at the right weight pressure to unlock it.



by:

Well built fifth wheel hitch. Haven't got a chance to tow our new Montana High Country 295RL. But I know a guy that has towed his fifth wheel with this same hitch. I'm sure this 18K hitch will be excellent! Or I wouldn't have bought it. I recommend e trailer for everything.



by:

Has to do a little assembly, really easy. Tows super nice, when turning does move towards the back. You’ll need to adjust the guides for the fifth wheel.



by:

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.



by:

Love this hitch. While it is heavy it provides the stability and auto slide capability that I need to comfortably drive my 5th wheel thousands of miles. I have never had my 5th wheel contact my cab no matter how tight I turn.



by:

This product definitely gives me more availability for tighter turns that I was looking for. Second trip we took one of the pins popped out of the puck locking mechanism. Our last trip to Wyoming the spring pin that holds the head onto the frame was laying in my pick up box, bought a new spring pin clip that’s a little tighter, that seem to fix that issue. It would be good practice to go over the entire hitch of all mechanisms latches and secure pins before traveling. Seems with the moving and shaking, they may have a tendency to loosen a bit overtime.



by:

A very nice hitch. If you have a bed carpet or a bed liner it may require Un shimming the locking pins. I have a bed carpet and I had to stand on the back corners to get the pins to engage the bed pucks. Not really a big deal. It is very heavy so I assembled it in the bed of the truck. I would highly NOT recommend doing it this way except if you are by yourself. Get a chain hoist or maybe an engine hoist because it is very heavy as an assembled unit. It is flawless in its operation. Very well made. I am very happy with it.



by:

Item works exactly as described. I have a shortbed (6.5') Ford F350. Probably towed our 5th wheeler 5000+ miles with no problem. Then last year it happened! We were making a sharp turn in an uneven lot and POW, the 5vr hit the rear window and it exploded. After that I became gun shy about turning with the 5vr attached so I started looking at sliding hitches. A slider that you had to get out and unlatch to make work, didn't make sense to me. At what point do you get out? So, an auto slider hitch was purchased. Now when I get to a certain degree turn the auto-slide hitch moves back in its carriage and then auto-slides to the normal location once straightened out. Not gun shy anymore.

Pro:
Well packaged
Well made
Easy install
It WORKS.

Cons:
Price
Very heavy
Some clunking after it straightens out from a turn



by:

Very happy with my Demco Autoslide hitch after one year. We pull a Montana 3120 35 ft 5th wheel with a 2019 Ford F-350 short bed. Took a month long 6,000 mile trip from Colorado to New England/Canada this Summer. Lots of hilly/curvy roads and some remote campgrounds with tight corners and some near 80 degree back ins. Never came close to trailer contacting the truck. I’ve had no jerking or other issues when turning or stoping/starting. Works great. The only drawback is there isn’t much room for error when you back up to hook up the trailer, so it takes a little practice to get used to correctly lining up your Demco Hitch to the trailer. The first couple of trips, it took me 3 or 4 attempts to properly line it up. No longer an issue for me after a few trips and you get used to the angles. It weighs about 300 pounds. I got a small chain hoist which I installed in my garage rafters and easily lift the hitch in and out of my truck and just let it hang front he rafters until I need to use it.



by:

So far this hitch has performed well. I have a Mor Ride hitch and had to purchase the adapter plate. The hitch connects well to the adapter plate which eliminates me having to use the adjustable side bars. The hitch is heavy but sturdy. I would recommend this hitch to anyone looking for a hands free sliding hitch.



by:

I think that etrailer requires their employees to lie so as not to have any confrontations with customers on the phone. I placed two orders on 8/23 and immediately received followup emails that order received, order processed by (employee name) and then is in stock with associated time each step completed.
Then I noticed that shipping date kept getting 1 day later each day I checked order status. So, I contacted etrailer on day 5, 8/27 and find out my item was not in stock at all and would not be until mid Oct. Well,I then had them order me the same part by a different manufacturer and was told that it was in stock and would still be still be shipped 8/28 and delivered on 8/30, the same day my fifth wheel hitch is being delivered, so everything seemed rectified until I checked order status online the evening of 8/28 and find that the ship date again had been pushed back another day 8/29 with a delivery date of 9/1, (which is a Sunday). Seems that at this rate I may have it sometime in September. Going by their assurance of delivery on 8/30, I arranged to pickup my new camper on 9/5, that seems to be an impossibility at this time because Order #121389499 the installation kit with base rails is a very necessary part of the assembly. So, in closing I can only say that if you do not have the parts to ship, be honest and state the truth. This has made me feel very negative now toward etrailor as I already had become with Camping World. Is there any honesty in the RV parts aftermarket?



by:

The Demco Auto slide takes the worry out of towing my fifth wheel trailer with a short bed F-350. I have had no problems with backing into tight camping spots. And since everything is automatic I have one less thing to worry about while traveling with a fifth wheel.
The only problem is that it is a little on the heavy side, so I just leave it in the truck when not towing. Problem solved.
I am extremely happy with the product.



by:

Installation was straight forward operates very smooth and quiet installed overhead winch as seen in photo to make install easy also to remove very impressed with the craftsmanship of hitch.



by:

I had an auto sliding hitch made by a competitor. It wasn’t built anywhere near the quality of this hitch. This hitch is much smoother and far better quality of construction hands down it’s a better hitch.



by:

After a year, I still like my Demco autoslide. It works great. I have pulled my trailer quite a few times and have had no issues at all. I know quite a few people that pull 5th wheels and one actually went out and purchased a autoslide after watching mine work.


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    view full answer...
  • Auto Sliding 5th Wheel Hitch for a 2017 Ford F-250
    Yes, the Demco Hijacker Autoslide 5th Wheel Trailer Hitch w/ Slider is exactly what you need. It has an automatic sliding head so you do not need to get in and out of the vehicle to make a sharp turn on a short bed truck like your 2017 Ford F-250 Super Duty. It will install easily on the above bed rails you have on your truck now. There are also a few different capacities listed such as part # DM8550040 for 13,000 lbs, part # DM8550034 for 18,000 lbs, or part # DM8550035 for 21,000 lbs....
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  • Recommended 5th Wheel Hitch Rails For 2021 GMC Sierra 1500 with 5-3/4' Bed
    For your customers 2021 GMC Sierra 1500 with a 5-3/4' bed you'll need to install the B&W 5th Wheel Rails # BWRVK2504. These are custom designed for their truck minimizing how many holes you'll need to drill. Keep in mind with a super short bed like that the customer will have to have a rotating pin box to be able to use a Pro Series 16k hitch, or they'll need a special hitch like the Demco Autoslide # DM8550040 which slides back 22-1/2" as you turn so you won't have cab to trailer contact...
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  • Compatibility of Demco Autoslide with 2018 Ram 2500 6.5 Foot Bed
    The Demco 13K with a 22-1/2 inch slide # DM8550040 and # DM8550041, will not work for your application. It would cause issues with the tail gate. The confirmed fit for your truck is the Demco Hijacker Autoslide 5th Wheel Trailer Hitch w/ Slider - 18,000 lbs # DM8550034 or the 21K # DM8550035. Either will work well with the Rail adapter for Ram 5th Wheel Towing Prep Package # DM6099 or the Reese 5th Wheel Rail Adapter # RP30154. The weight of the hitch is 273 lbs for the 18K and 305...
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  • Recommended 5th Wheel Hitch for 2020 Ram 1500 EcoDiesel 5-1/2 Bed
    Demco makes a Hijacker Autoslide model that would provide 22-1/2 inches of clearance, so you wouldn't need the Sidewinder. The hitch is part # DM8550040 and the install rails/brackets are part # DM8552032-71. During low speed sharp turns, the Autoslide mechanism will disengage, allowing the hitch head to slide rearward which will allow the proper clearance between the truck cab and the front of the 5th wheel. This hitch is compatible with non-Rambox equipped trucks without the factory air...
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Info for this part was:

Employee Mike L
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