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The Demco Autoslide takes care of short-bed turning space automatically. Its built-in rack-and-pinion gear system provides 14" of smooth, controlled travel whenever you turn sharply at slow speeds, sliding the head toward the tailgate for extra clearance and back to center when you straighten out. No need to stop and pull a lever—just drive and let the hitch handle it.
This hitch is rated for 18,000 lbs gross towing weight with a 4,500 lbs vertical load limit. The sturdy steel construction and solid locking design give you confidence hauling big campers or toy haulers. With a 37" long by 32" wide base and height settings at 15-1/2", 16-3/4", and 18-1/4", it’s built to handle weight and maintain proper trailer level.
The wraparound jaw completely surrounds the king pin for full 360-degree contact, cutting down on rattle and chucking that can wear you out over long trips. A 3/4" thick solid steel locking bar reinforces the connection and automatically locks into place when the jaw closes. The result is a tight, quiet, reassuring hookup every time you tow.

The double-pivot hitch head flexes front to back and side to side, making hookups easier and smoothing out bumps and dips on the road. Three polyurethane dampeners absorb shock and reduce noise so you feel fewer jolts inside the cab. It’s a simple design that makes towing feel steady and controlled mile after mile.
Installation is straightforward thanks to the included custom underbed mounting kit. Side plates bolt on to set your preferred height, then drop the hitch into the four receivers in your bed to lock it in place with turn handles and safety pins. When you want full bed access, just remove the pins, unlock the feet, and lift it out—no extra brackets left behind.

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.

Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.
Today we're going to take a look at the replacement side plates for the Demco Hijacker Autoslide fifth wheel trailer hitches, and this is for the underbed mount. Now this will replace the side plates that came standard with your Demco Hijacker Autoslide underbed fifth wheel trailer hitch. They are designed to bolt onto your hitch base so that you can attach your hitch to the custom underbed rails. This is designed to fit the 13,000 pound Hijacker, Part Number DM8550041. It also fits the 18,000 pound Hijacker, DM8550022, and the 21,000 pound Hijacker, DM8550037 models. This is a simple bolt-on installation to your hitch base. There are multiple rows of bolt holes on these side plates and on your hitch base, so depending how you line them out, it will let you adjust the hitch height.
The hitch height settings will go from either 15-1/2 inches to 16-3/4 and 18-1/4, so you have your choice of those three settings to get your trailer and tow vehicle as level as possible. These do have a rust-resistant black powder coat finish. They are an all-steel construction. It does include the instructions. It will include the mounting hardware, and it also includes two 1/4-inch spacers and two 3/8-inch spacers, and the spacers are used for adjusting your hitch mount with the bed pockets of your truck, and this part is made in the U.S.A. The way that these would open up is you just pull the clip, pull the pin out, and you can see each one of these will rotate out, and when you rotate those out, it will let you drop it into your underbed mount, and then once there, you just turn this back in to lock it, and then put your clip right through there just like that. This part is made in the U.S.A. That should do it for the review of the replacement side plates for Demco Hijacker Autoslide fifth wheel trailer hitches with the underbed mount..
Ratings & Reviews

Sheryl
2/21/2022
Still good after one year. My hitch is easy to install and remove with the help of a modified engine hoist. The truck bed remains just that, a truck bed for hauling crap around.

Kenneth S.
2/6/2021
It did take work too install. The bed did have to be raised up but it wasnt a big deal. I do wish they had caps that fit better in the holes because the rails do sit flush with the bottom of teh bed. Rubber s moght be better to grip in.

Thomas S.
2/7/2019
THE BEST FUNCTIONAL SHORT BED 5th WHEEL HITCH OUT THERE BUT ALSO THE HEAVIEST AND THE MOST DIFFICULT TO REMOVE AND REINSTALL. I HAD TO TAKE IT TO A GARAGE TO REMOVE IT AND AGAIN TO REINSTALL IT. I JUST LEAVE IT IN THE TRUCK BED NOW RATHER THAN FIGHT WITH IT.

Andy
3/15/2022
The Demco hijacker 18 K I think is the best hedge out there by far three different height settings and the auto slider part of it is awesome haven’t had an issue at all
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Buddy R.
3/24/2019
good happy with the whole set up.had a small issue that demco remedied swiftly.only other thing is the finish does not seam to last.it is covered when not in use and it chips and rust,s easily