Demco Autoslide 5th Wheel Trailer Hitch w/ Slider - Single Jaw - Above Bed - 21,000 lbs
(593 reviews)
Price: $2,050.00
Demco Autoslide 5th Wheel Trailer Hitch w/ Slider - Single Jaw - Above Bed - 21,000 lbs
Item # DM8550035
Retail:$2,455.00
Our Price: $2,050.00
You Save: $405.00
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Demco Fifth Wheel Hitch - DM8550035
- Aftermarket Below Bed Rails
- 21000 lbs GTW
- Sliding Fifth Wheel
- Demco
- 15-1/4 - 18 Inch Tall
- Premium - Single-Hook Jaw
- Double Pivot
- 14 Inch Fore/Aft Travel
- 5250 lbs Vertical Load
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.
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 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 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, 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.
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.
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
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" + 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.
6107 Demco Hijacker Head Assembly for Auto Slide 5th Wheel Trailer Hitch - 21,000 lbs
6003 Demco Hijacker Adapter Plates for Auto Slide 5th Wheel Trailer Hitch
Installation Details
Alternate Instructions
Customer Satisfaction Score:
97% were satisfied with this product
3% of customers were not satisfied
Customer Reviews
Demco Autoslide 5th Wheel Trailer Hitch w/ Slider - Single Jaw - Above Bed - 21,000 lbs - DM8550035
Average Customer Rating: 4.7 out of 5 stars (593 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.by: Bob T12/16/2020
This review is for the Demco Autoslide 21k and accompanying OEM rail adaptor I purchased for a 2020 Ram 3500 Megacab DRW. I've owned it one year. Overall, the hitch performs as I expected. It is high quality, very sturdy and seems like it will last for a long time. I had it installed at the dealer when I purchased the truck. It automatically slides to protect the cab in my 6'4" bed without any incidents. I tow a standard fifth wheel RV. There are a few negatives, which are not necessarily shortcoming of the product but, instead, necessary evils to allow me to have a short bed. First, it is BIG and BULKY. I believe this is just a function of the mechanism required to allow the autosliding feature and I am not really sure there are any other lighter alternatives with this feature. The fact it requires two parts (OEM Puck Rail and hitch), make it even more bulky. It takes up almost the entire bed and prevents most auxillary tank / tool box combos from fitting. Even standard size storage bins will not fit in my bed. I would prefer if they had a custom OEM all-in-one hitch for my truck like they do for the Ford. It adds significant weight, which decreases carrying capacity, which can be at a premium in hauling a heavy fifth wheel. I've never even tried to take it out of the bed due to the weight and difficulty. I also am not very happy with the adjustable catch plate design. It requires significant manipulation loosening and tightening 8 nuts when hitching and unhitching. This requires a step ladder to reach the nuts. I also found out after the fact that it does not come with the right size catch plate attachments for my hitch and I had to purchase a separate part, which added unexpected expense and delayed my taking the RV on its first trip. Overall, I am satisfied with the hitch.
by: Scott11/28/2018
This is a quality piece of equipment. I can't wait to use it. The installation directions were complete and easy to follow. Looks fantastic.
by: Darrel 01/14/2022
I wish the place I bought my camper would have recommended this from the start. Makes owning a 5th wheel so much easier!
by: Ron01/09/2023
We received the hitch in great shape. The boxes were in very good shape. The only problem was a missing polyurethane dampener that was’t included. I called and received great service from etrailer. I have had a demco autoslide for several years but it was an 18000 pound hitch and went to a 21000 pound hitch. They are the best hitch for a shortened truck on the market
by: Joe W.10/26/2017
Great hitch. No capture plate to deal with, you can hook up to any 5th wheel. No more greasy pin box. No more watching the mirror wondering if your going to hit and damage the cab of your truck. Works perfectly. Built solid, though I did purchase the 21K for a 15K 5th wheel. Easy to lube. The only drawback I had was that it sat just a little bit high in the truck even on the lowest mounting holes. If you are thinking of purchasing this you may want to take some measurements first. I have an 08' F350 SD with air springs so it does set high. Before I bought it I called the factory (easy to reach and eager to help) and asked them, among other things," if the hitch broke, could I easily get parts for it?" They replied that if you need parts we will get them to you wherever you are. Overall I think this is the best hitch on the market.
Joe W.
10/26/2018
After about 6000 miles the hitch developed some fore and aft movement. After another 2000 miles it seemed to be excessive with a loud clunk when stopping and starting. Yes, I do grease it as per instructions before each trip. I called Demco and told them the problem and they sent me the parts I needed at no charge since it was under warranty. Since I had the mechanical ability I disassembled, diagnosed and repaired it myself. I thought later on that I should have been compensated something for my time only because if I took it to a dealer they would have charged for labor. Just a suggestion, there needs to be an easier way to lubricate this hitch rather than removing the large pivot pin and also the large pivot bolt and greasing them by hand. Some well placed grease fittings would make this job a lot easier and cleaner, especially when on the road. Also, the hitch owner would be far more inclined to do it. Other than that the hitch has performed great and I am very happy with it. Thanks.
by: Paul 07/23/2022
Best 5th wheel hitch ever for a RAM 3500 mega cab.
No issues with the RV coming close to the back of the cab or back glass.
I would recommend this hitch to anyone searching for a 5th wheel hitch for a Ram mega cab, I wish I knew about it when I first purchased my Ram mega cab, I learned the hard way, after busting out my back glass...and trying several hitches. This hitch is truly an autoslide. I have showed several short bed guys this hitch and told them the cost of the 5th wheel hitch is worth it.... It is top of the line. This will be the last 5th wheel hitch I will ever need to purchase.
by: William07/25/2021
Works great except life would be so much simpler if they had a hole drilled on each side to remove the lock pins that are below it in the mounting plate to be able to remove the unit from the truck.
Jon G.
7/30/2021
Thank you for the review! While I do see where a hole in the mounting bracket would make this easier to remove with your Adapter Plate # DM6333, a solid bracket in this instance is much better for strength, especially considering this hitch is designed around the universal rails for trucks.
by: Steve 01/26/2017
I had trouble with this hitch at first. I could not get it to close and latch properly when I backed into the king pin. I worked with tech services and ended up replacing the inner pivot parts and I have really not had any issues since. Because I have to have the locking plate for my pin box, you do have to line up the truck just right for it to latch properly, but once you figure that out, it is easy. The auto slide feature works really good. I have a short bed RAM truck and I have completely turned 90 degrees with my trailer attached and it slides back with no issues to miss my cab. I highly recommend this hitch. Also the Demco Tech Services guys are great to work with.
by: Jon09/14/2021
Pretty pathetic service from etrailer. Order place on Aug 25th with ETA of the following Friday (1o days). But nope, I wait. It finally (and supposedly ships) on Sept 7th (13 days later). On Sept 14th I received a confirmation that my items were delivered, but nope. Not to my house anyway. Avoid these folks if you want something to arrive when they say it will arrive.
Brooke M.
9/23/2021
Thank you for bringing this to our attention. Our customer service team should be reaching out to you in the near future.
by: Richard06/05/2018
If you have to have a slider this is the one to buy. I’ve now driven with it about 5000 miles..the only down side is that you have to hook and unhook with the truck perfectly straight in line with the trailer. But it does work perfectly as advertised.
Richard
6/5/2019
Great, customer service with [Demco Representative] could not be any better..he knows this hitch like the back of his hand . I would buy another just because of him.
by: Kenneth 05/12/2021
It works really well. It is really nice not to worry about the 5th wheel trailer clearance when making tight turns. We pulled the rig several hundred miles last summer and at least 3000 more since January with no issues.
Also I used the height adjustment feature when setting up my trailer.
When I received the shipment I was impressed by how well it was packed. It would have been nice to had had help, but I was able to assemble and mount it myself. The instructions were good, and as I said, we have had no issues during our first snowbird season.
by: Randall09/04/2021
This is an initial impression review. The hitch was delivered on a pallet and arrived earlier than expected. Everything was well packaged with all associated hardware. This hitch was mounted on Reese Quick-Install Custom Outboard Installation Kit w/ Base Rails for 5th Wheel Trailer Hitches ( in the bed of a 2007 Dodge Mega Cab 3500. Overall it appears to be well constructed, unfortunately, I did have issues with bolting the hitch adapters to the hitch. The hardware is either grade 3 or 5 (looks like 5) and did not torque well. I had one bolt that stretched and sheared before I reached the torque spec (photo attached). I'm not sure if this was designed to use the weaker hardware or a business decision, however, all eight bolts were replaced with grade 8. I do look forward to utilizing this hitch in a few months. I would at photos, however it appears that I can't.
by: Lucas03/13/2017
Very happy with the product. The only draw back is the weight. Can't be loaded/unloaded by one person.
A good cross-sell opportunity is to offer a tool for removal.
When I first got it, it didn't fit the truck. Support team was helpful and responsive. It seemed to be due to the bed spray. I was able to get it to mount perfectly by loosening a bolt under the truck, and then smoothing the edges of the locks in the rails.
by: Osvaldo07/29/2020
thanks to Greg S. he helped me a lot in choosing and answering all my questions
by: Ryan05/15/2022
Really like this hitch. Two things I don't like however, are 1) you need to backup almost perfectly the way you unhooked or it's a bear to hitch backup. 2) I don't like the bolts for the pinbox. Wish there was a quicker alternative. Hate getting a wrench out to tighten and losen.
by: James A08/22/2018
great product i love it etrailer support was great. I had a question called the manufacture they have great service too. Best part is its MADE IN THE USA in Iowa.
by: Gregory 08/21/2021
Purchased a heavier 5th wheel so this one replaced my pull rite. No more capture plate to deal with. Very happy with this hitch.
by: Virgil03/28/2022
The hitch and adaptor arrived in three days. Everything went together fairly easy considering I had just torn my rotator cuff a week earlier and my helper never showed up. Definitely would have been easier with two people. Had planned a trip next week to Yellowstone National Park but will have to wait until after surgery. Will do a follow up review after I am able to see how well auto slide works. Great customer service!
by: Marius07/01/2020
Good hitch but very heavy and hard to maneuver
If that's not an issue it works perfect
Don't have to worry about turning with 6,4 bed
Etrailer great job shipping , etc
by: Craig 09/30/2023
The hitch works perfectly
by: Chuck08/26/2021
Worked good but a lot of adjustments. They sent the wrong capture plates. Demco customer support was great.
Sierra K.
9/1/2021
In the description it says locking plates, sold separately, are required for the Rota-Flex Pin box that you have. Item # DM6171
by: Paul01/25/2023
Very well made easy to install with another person would buy again
by: Karl 06/24/2021
Had a set back on the shipment, but the service and responded was some of the best I've ran across. The equipment came before the give delivery date. Everything was in great condition, good communication.
by: Leroy 08/16/2023
i really love it
by: Robert 04/07/2020
Extremely well made product and as always arrived in perfect condition. Etrailer is my go to for all things trailer related and is the first place I look!! They have the best prices around and stand behind every sale which gives me confidence in every purchase. I love this hitch and look forward to many years of towing with it! Thank you again etrailer!!
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See what our Experts say about this Demco Fifth Wheel Hitch
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view full answer... - Automatic Sliding Hitch Recommendation for a 2012 Chevy Silverado 2500 Short BedI spoke with my contact at Demco about the locking plates and the HiJacker autosliding 21k 5th wheel hitch # DM8550035. You do NOT need a locking plate for a Rota-Flex pin box! The hitch works as it should without a locking plate. I have included a link to a video review of this hitch for you. This would be the best option for you as it is an auto slider like you said you wanted, has a 21k capacity and works as-is with your Rotaflex. For a rail kit you would want the part # DM8552011-71...
view full answer... - Do I Need a Sliding Hitch or a Fixed Hitch for My 2022 Chevy Silverado 3500 Short Bed with OEM Prep?We here at etrailer always recommend a sliding fifth-wheel hitch for a short-bed truck like your 6-3/4 ft. bed on your 2022 Chevy Silverado 3500. This is no exception with the 2020 Grand Design Reflection. For a great sliding hitch for your setup, I definitely recommend the Demco Hijacker - 18K # DM8550034 or the 21K # DM8550035. Since the Hijacker comes with an automatic slider, you do not have to exit the comfort of your truck in order to make manual adjustments for turns. Another great...
view full answer... - Mounting Brackets for Demco Hijacker Fifth Wheel Hitch on 2013 Ford F-150For the Demco Hijacker # DM8550035 I recommend the Demco Base Rails and Custom Installation Kit # DM8552004-71, which is a fit for a 6-1/2' or 8' bed on a 2013 Ford F-150. These rails will allow you to mount your Hijacker and the brackets are a custom-fit for your truck, meaning there is not going to be any type of drilling into your F-150's frame to install them and is going to significantly reduce the amount of time it will take for installation. The other option is the Demco Base Rails...
view full answer... - Can Demco Hijacker Autoslide be Used with Lippert Trailair Pin BoxYes, a Demco Hijacker # DM8550035 can be used with the Curt cushioned pin boxes like the ones that fits as a replacement for your Lippert 1621 # LC158778. No adapters or capture plates are needed. The hitch connects directly to the pin box and will work great!
view full answer... - Hitch Head Height of Demco Hijacker Autoslide 5th Wheel Hitch On 2021 GMC Sierra 3500 with PucksIn order to use the Demco Hijacker Autoslide 5th Wheel Trailer Hitch part # DM8550035 on a 2021 GMC Sierra 3500 6-3/4 Foot Bed with OEM Prep Pkg you'll also need the Demco 5th Wheel Rail Adapter for Chevy/GMC OEM 5th Wheel Towing Prep Package part # DM6333. The hitch head height of the Demco Hijacker is 15-1/4", 16-1/2", and 18" but you'll need to add 2" while using the adapter to each of these. I do have an option for you to get the trailer level but you won't likely find a fifth wheel...
view full answer... - Recommended 5th Wheel Hitch for 2019 Ram 2500 w/ a Short BedDue to the fact that the truck has the shorter bed, you'll want to go with a sliding fifth wheel hitch to provide enough clearance between the truck cab and the front of your fifth wheel. I recommend the Curt Q20 fifth wheel hitch, part # C16541 as well as the # RP50054-58 installation kit. The Q20 features a fully articulating hitch head and a two piece jaw mechanism that holds the king pin very tightly, which provides good ride quality. The slider mechanism will give you 12" of travel. For...
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Info for this part was:
Expert Research:
Mike L
Expert Research:
Michael H
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Jameson C
Expert Research:
Adam R
Expert Research:
Jeffrey L
Edited by:
Lindsey S
Installed by:
Jeff D
Installed by:
Michael B
Video Edited:
Jacob T
Video Edited:
Dustin K
Video Edited:
Chris R
Updated by:
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Test Fit:
Robert C
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Darrel
1/17/2023
I firmly believe that every fifth sold should have one of these hitches. It is a job getting it in and out of truck but I feel better knowing its not going to let my trailer damage my truck.