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Old 04-18-2021, 03:16 PM   #1
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5th wheel hitch slips

We have a CurtQ 5th wheel hitch. We checked it out because on first acceleration it feels like the is a lot of slipping at the hitch and then it jerks caught and 'catches up' with us. I saw 2 inches of movement in the white plastic piece. The RV repair guy took a look since we had it in for a second AC. Says he say about 1.5inches movement, but not sure if this is normal or not not. Any input appreciated.
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Old 04-18-2021, 03:20 PM   #2
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Oh it's on a 2018 297RKS. Seems like it has done this since we bought new, but thought it was something else.
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Old 04-18-2021, 07:45 PM   #3
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I have an older Curt 20K slider, and I know it has some play. I never tried to see how much, but it definitely makes some noise starting and stopping. It's been back there for 11 years though, and never any issues.
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Old 04-18-2021, 07:59 PM   #4
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Thanks. Just always sounds something Is gonna break.
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Old 04-19-2021, 01:23 PM   #5
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We have a Curt A16 slider hitch, and it has some play, probably less than 1/2", but it can make a pretty good "clunk" when you stop and start.

I found you can really minimize or eliminate the noise by adjusting the gain on the trailer brakes properly. The idea is to adjust things so that the trailer brakes finish the stop rather than the truck stopping the trailer.

The clunk comes from the truck stopping before the trailer, so the trailer slides forward that last little distance and clunk! Then when you start out, the truck pulls ahead until that little distance is gone, then another clunk.

By adjusting the gain on the trailer brake control (usually higher), and using some finesse "feathering" the brake pedal at the end of a stop, you can get the trailer to stop first, and since it never slides forward, there is no clunk.

It takes a little practice, but it comes natural after a while ....
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Old 04-19-2021, 01:46 PM   #6
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I put on a new Curt hitch on my 2018 F-150 and unlocked my Reese Revolution. The universal wedge did not work well, so I bought the Curt wedge and carefully adjusted it. I don't get any slop pulling or stopping. I had a PullRite 3300 slider on my Tundra and it was pretty quiet too.
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Old 04-19-2021, 09:41 PM   #7
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Quote:
Originally Posted by Cathcartww View Post
We have a Curt A16 slider hitch, and it has some play, probably less than 1/2", but it can make a pretty good "clunk" when you stop and start.

I found you can really minimize or eliminate the noise by adjusting the gain on the trailer brakes properly. The idea is to adjust things so that the trailer brakes finish the stop rather than the truck stopping the trailer.

The clunk comes from the truck stopping before the trailer, so the trailer slides forward that last little distance and clunk! Then when you start out, the truck pulls ahead until that little distance is gone, then another clunk.

By adjusting the gain on the trailer brake control (usually higher), and using some finesse "feathering" the brake pedal at the end of a stop, you can get the trailer to stop first, and since it never slides forward, there is no clunk.

It takes a little practice, but it comes natural after a while ....
I have had some moderate success with this method. It is difficult to get it just right, then it doesn't take much to forget all about it and clunk it all up at the first red light. Oh well. I've been good with it for 11 years.
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Old 04-20-2021, 07:15 AM   #8
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Which "white plastic piece" are you seeing move?
Which direction is the movement?

If you have movement in the pin box frame it could be a problem.
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Old 04-20-2021, 06:54 PM   #9
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My PT pin box was causing my clunk. First time pulling my new 5’r, on the way home. Noticed it seemed to float over the bumps with too much up and down movement. Tightened the bolts, all is well. I broke the fiberglass fairing a couple of years ago. Put in 2 more grade 8 bolts while I had that apart. Now, there are 3 bolts per side instead of 2. Repaired the fairing, all is even better now!
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Old 04-20-2021, 07:49 PM   #10
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Quote:
Originally Posted by S.kimbruce View Post
We have a CurtQ 5th wheel hitch. We checked it out because on first acceleration it feels like the is a lot of slipping at the hitch and then it jerks caught and 'catches up' with us. I saw 2 inches of movement in the white plastic piece. The RV repair guy took a look since we had it in for a second AC. Says he say about 1.5inches movement, but not sure if this is normal or not not. Any input appreciated.
So you have a "Q" (not a A or E series) series double jaw Curt Hitch, and you are talking about movement of the 1/4" thick white lubricating disk that goes around the 2" pin on the fifth wheel when properly attached to the Q-XX Curt fifth wheel hitch.

Are you saying there is 2 inches of forward/backword movement of the 2" pin within the Curt hitch?
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Old 04-20-2021, 08:08 PM   #11
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I've had a Curt Q20 for several years ... pretty rock solid as far as stop and go pulling. If you remove the 2 keepers from the 2 pins that hold the saddles to the base, lift the head off. There are two square rubber bumpers on the upper head itself and another rubber bumper with a square hole in it bolted to the base. These should have a little play in them, but not a whole lot. If they are used up or missing ... you can buy them from Curt. They are a very easy install. Make sure you have the large pivot pin correctly in place when you replace the upper head to the base. You won't be able to install the saddles and pins if the pivot shaft is not set correctly. Make sure to grease it per manuf instructions. I also spray some WD-40 or dry graphite spray on the hitch jaw mechanisms as well. Makes it lock in better when hitching up. As far as the "white plastic piece" ... I'm guessing that is the lube plate that goes around the pin box pin. It should fit tight around that pin. I've never seen anything near 1.5" between the lube plate and the steel horseshoe shaped Curt fiver plate once the fiver is set onto the hitch. If so, I'd think something is going on with the clamshell jaws.
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Old 05-06-2021, 07:41 AM   #12
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Originally Posted by FrankG View Post
So you have a "Q" (not a A or E series) series double jaw Curt Hitch, and you are talking about movement of the 1/4" thick white lubricating disk that goes around the 2" pin on the fifth wheel when properly attached to the Q-XX Curt fifth wheel hitch.

Are you saying there is 2 inches of forward/backword movement of the 2" pin within the Curt hitch?
Yes. At least the lubricating disk is moving that much. The thing is, the jaws look pretty tight on the king pin.
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Old 05-15-2021, 04:05 PM   #13
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Silly question, but is this a slide hitch?
I have a 20K Curt hitch and it is not a slider, but if I take of quickly or stop fairly quickly, there is definitely some movement. When I am conscientious of how I stop and start, the noise/jerking is hardly noticeable.
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Old 05-15-2021, 05:26 PM   #14
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It is not a slider. Since I'm always the copilot, I cant tell about awareness starts and stops. We were mostly afraid it was the pins holding the 5th wheel in the truck. Until I got in the backseat and saw the upper movement. Sounds like this is the norm, so nothing is breaking and I'm good with that.
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Old 05-15-2021, 05:37 PM   #15
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Bama Rambler the lubricating disk seems to be moving front to back about 2 in. The jaws are good and tight around the kingpin, so I dont really see how it can move that much. Sounds like others have some movement, too. I'm going to watch some more and see if it was a fluke that day or maybe I didn't see it as clearly as I thought. As long as that king pin is held firm, I guess we are ok.
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Which "white plastic piece" are you seeing move?
Which direction is the movement?

If you have movement in the pin box frame it could be a problem.
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Old 05-15-2021, 06:44 PM   #16
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What pin box do you have? And what is your reference when you say 2” of movement? By that I mean is the white disk moving 2” on the top of the hitch, or is it moving 2” as compared against the top of the pin box? We have a morryde pin box with the rubber spring in it. The top and bottom portions of the pin box will move in relation to each other. The white disk is attached to the kingpin and the bottom portion of the pin box. The jaws hold the king pin pretty well inside the hitch and there is little to no movement of the kingpin and attached white disk in relation to the hitch. But if you were looking at the white disk and seeing it move in and out in relation to the top of the pin box I could envision 2” of movement.

Other hitches might have similar movement with the pin box.
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