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This hitch takes care of tight turns for you. The built-in automatic slider gives you 14" of travel front to back, so the trailer moves away from the cab when you turn and returns to center when you straighten out. The rack-and-pinion gear system handles the sliding motion smoothly and consistently, eliminating the need to pull a release lever or hop in and out of the truck during every backing maneuver.
The wraparound, single-hook jaw design grips the king pin with full 360-degree contact for a tight, secure hold. A 3/4" solid steel locking bar reinforces that connection and automatically locks when the jaw closes. This setup minimizes rattle and chucking while giving you a steady, quiet ride on rougher stretches of road.
The double-pivot head moves front to back and side to side, letting it align naturally as you back into the pin box. Three polyurethane dampeners absorb road shock and cut down on noise, so towing feels steady instead of jerky. The head pivots into place automatically when you couple up, making hookups smoother every time.
The hitch comes pre-assembled and installs using the included underbed mounting kit. Bolt on the side plates, set your chosen height—15-1/2", 16-3/4", or 18-1/4"—and lock it into the receivers with the built-in handles and safety pins. When you’re not towing, unlock the same handles and lift it out to clear your bed completely.
With a gross towing weight rating of 21,000 lbs and a vertical load limit of 5,250 lbs, this heavy-duty steel hitch is ready for serious fifth-wheel trailers. The rust-resistant black powder coat adds protection against wear, keeping it dependable trip after trip.
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.
Alternate Instructions
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
Tony C.
7/9/2018
The under bed rails and Demco hitch are great. I have put 20 thousnd miles on them with 13,654 pounds of fifth wheel trailer
Buddy R.
3/24/2019
great!
Darin
3/11/2023
This hitch has been working flawlessly for the past year. I would definitely recommend this hitch to anyone that is looking for a great sliding fifth wheel hitch.
Stanley
8/2/2023
Don’t have problem with parts , it is the service . The first time I ordered everything went great and on time . The bext time I ordered all my parts wasn’t there , I was told I would receive missing parts the day day before my travel . Then I get confirmation email that I was gonna receive my parts two days after my leave date to be told there isn’t anything they could do . Why should I lose out on my week stay in key west at a night because they didn’t send me my parts I ordered way before my leave date .
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Wil K.
2/17/2020
Everything has been working great, no problems at all!