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09-20-2012, 05:42 PM
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#1
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Member
Join Date: Jul 2012
Location: Brandon, Fl
Posts: 71
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Thunk
I have a Ford 250 Super Duty with a Reese 16k 5th Wheel hitch towing a Cardinal 30 LE RK. Sometimes there is a thunk when I take off or stop. Sometimes there is no noise at all. I always hook up the same way. So I am not sure what would cause the noise. Is there a little room for play with the kingpin and is that causing the thunk? Just want to make sure all is okay!
Thanks y'all
Skip
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09-20-2012, 06:57 PM
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#2
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Mod free 5er
Join Date: Mar 2008
Location: Concord, NC
Posts: 24,702
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Quote:
Originally Posted by sor126
I have a Ford 250 Super Duty with a Reese 16k 5th Wheel hitch towing a Cardinal 30 LE RK. Sometimes there is a thunk when I take off or stop. Sometimes there is no noise at all. I always hook up the same way. So I am not sure what would cause the noise. Is there a little room for play with the kingpin and is that causing the thunk? Just want to make sure all is okay!
Thanks y'all
Skip
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I have the same hitch and had the same problem. I ended up making some 0.075" thick steel shims and fit under the 4 legs of the hitch. It now requires driving the pins in with a dead blow hammer, but no more thunk.
The shims are long enough and wide enough that the entire leg sits on the shim and have rectangular slots for the pin brackets.
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09-20-2012, 07:02 PM
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#3
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Phat Phrog Stunt Team
Join Date: Aug 2011
Location: Iowa
Posts: 34,507
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Quote:
Originally Posted by dunnnc
I have the same hitch and had the same problem. I ended up making some 0.075" thick steel shims and fit under the 4 legs of the hitch. It now requires driving the pins in with a dead blow hammer, but no more thunk.
The shims are long enough and wide enough that the entire leg sits on the shim and have rectangular slots for the pin brackets.
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can you post a pic of your mounting rails ?
mine has adjustable pin slots to tighten .
I wonder if your guys does to ?
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09-20-2012, 07:08 PM
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#4
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Member
Join Date: Jul 2012
Location: Brandon, Fl
Posts: 71
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Okay, so you think the play is under the legs and not on the kingpin?? Never would have thought of that. Where did you get the shims? Thanks for your help
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09-20-2012, 07:12 PM
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#5
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Phat Phrog Stunt Team
Join Date: Apr 2012
Location: Tipp City, OH
Posts: 7,154
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I have a Curt 16k and it does the same thing. It's not the hitch that I wanted, but I needed one in a hurry when I bought my rig. I get some clunking in the head pivot, king pin, and from the rails. Going to get a new hitch this winter before our FL trip in March. Still not sure on which one just yet.
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2016 Georgetown 364TS
2017 Jeep Rubicon Recon toad
Nights Camped 2019 - 17
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09-20-2012, 07:17 PM
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#6
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Member
Join Date: Jul 2012
Location: Brandon, Fl
Posts: 71
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I will take a photo in the am,, kinda dark here in FL,,, minus the lightning!!!
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09-20-2012, 07:18 PM
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#7
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Phat Phrog Stunt Team
Join Date: Aug 2011
Location: Iowa
Posts: 34,507
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sounds good .
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09-20-2012, 07:36 PM
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#8
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Mod free 5er
Join Date: Mar 2008
Location: Concord, NC
Posts: 24,702
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Quote:
Originally Posted by f1100turbo
can you post a pic of your mounting rails ?
mine has adjustable pin slots to tighten .
I wonder if your guys does to ?
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GIVE ME A BREAK Ron, do you think I would have taken the time to make shims if they were adjustable??? The pin brackets are welded solid to the legs and they have 19/32"dia holes for 9/16' dia pins.
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09-20-2012, 07:39 PM
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#9
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Senior Member
Join Date: Sep 2011
Posts: 219
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Yeah got a Husky 16k and it thunks or whatever! Just reminds me its still back there!!
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Steve & Sue
2011 Crusader 320RLT
2008 Dodge Ram 3500 (CTD) DRW 4x4
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09-20-2012, 07:55 PM
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#10
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Mod free 5er
Join Date: Mar 2008
Location: Concord, NC
Posts: 24,702
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Quote:
Originally Posted by RattVader
Yeah got a Husky 16k and it thunks or whatever! Just reminds me its still back there!!
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Just keep in mind, when it thunks or whatever, it is wearing something out and putting a shock load into whatever is thunking. Thunk about it!
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09-20-2012, 07:58 PM
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#11
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Senior Member
Join Date: Sep 2011
Posts: 219
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I thunk your right!
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Steve & Sue
2011 Crusader 320RLT
2008 Dodge Ram 3500 (CTD) DRW 4x4
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09-20-2012, 08:01 PM
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#12
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Mod free 5er
Join Date: Mar 2008
Location: Concord, NC
Posts: 24,702
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Quote:
Originally Posted by RattVader
I thunk your right!
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Thunks!
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09-20-2012, 08:53 PM
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#13
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Phat Phrog Stunt Team
Join Date: Aug 2011
Location: Iowa
Posts: 34,507
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yep there different .........
I will post a pic of mine tomorrow .
you might then be jealous !
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09-20-2012, 09:03 PM
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#14
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Mod free 5er
Join Date: Mar 2008
Location: Concord, NC
Posts: 24,702
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Quote:
Originally Posted by f1100turbo
yep there different .........
I will post a pic of mine tomorrow .
you might then be jealous !
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I doubt the jealous part, mine is silent, installed and works just fine. PLUS, it, the truck it sits in and the trailer that hooks to it are all free & clear.
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09-20-2012, 09:24 PM
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#15
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Senior Member
Join Date: Dec 2011
Location: Kansas City & Sierra Vista
Posts: 247
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Quote:
Originally Posted by dunnnc
Just keep in mind, when it thunks or whatever, it is wearing something out and putting a shock load into whatever is thunking. Thunk about it!
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X2
My 16K Reese slider has a tendency the 'thunk' (starting to love that word!) but only when I am traveling slowly; through a town with lots of stop 'n goes, for eg.
I am running a Curt Discovery controller set at 3.0 and 3.0 for hiway. If I back the secondary off to 1.0 or so at the first stop, there is no problem and the thunk is gone and stops are smooth. I repeated this several times in a WalMart lot and now do it habitually as we encounter the speed zones coming into a town.
Although this works for the 'thunk' when braking, I like the idea of shims better.
dunnnc, did you come up with your shim thickness through trial and error, or did you discover a way to measure the gap beforehand???
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Jim & Kathy
2012 Crusader 290RLT TE, TrailAir flex pin: 2012 Toyota Tundra 5.7 SR5 Dbl cab 4X2 Tow, 4.30 gears, RideRite air, TRD cold-air induction & dual exhaust: Reese 16K Slider: TST tpms
Miles towed to date: 26,890; Nights camped; lost count!
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09-20-2012, 09:58 PM
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#16
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Senior Member
Join Date: Oct 2011
Posts: 278
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Quote:
Originally Posted by dunnnc
Thunks!
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I think your thunks were the cat being chased by a dog you ran over.
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