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Old 10-10-2012, 03:56 PM   #1
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Chucking

Can someone explain what is physically happening when fw chucking occurs?

what is the cause and what are the best solutions.?

Thanks for your insights.
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Old 10-10-2012, 04:32 PM   #2
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Is what you are decribing as "chucking" a clunk feel and sound when you first takeoff from a stop...or...when driving down un-even concrete repaired *#@&^% !! sections of I-69...I-75...I-96...in ..Michigan ??
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Old 10-10-2012, 04:42 PM   #3
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The jerking type motion when driving down the road.
Usually it is not too bad and quits within a minute. Other times it gets far worse.
Can oftentimes make it stop by changing speed, up or down.
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Old 10-10-2012, 04:54 PM   #4
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Originally Posted by rickthelen View Post
Can someone explain what is physically happening when fw chucking occurs?

what is the cause and what are the best solutions.?

Thanks for your insights.
I believe that "chucking" occurs when there is motion (Up and Down and Fore and Aft) between the king pin and the FW hitch while moving.

The cause may be from perhaps having too much play/clearance between the FW king pin and the hitch locking jaws. But remember that there has to be some play/clearance between the two or you would have a very difficult time turning your FW.

I get the chucking when traveling on a rough section of paved highway, but as long as my FW is still behind me when we stop, I feel OK,

I do check both the king pin and hitch for wear also and have not seen anything abnormal yet.

That is my take on it.
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Old 10-10-2012, 04:55 PM   #5
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The jerking type motion when driving down the road.
Usually it is not too bad and quits within a minute. Other times it gets far worse.
Can oftentimes make it stop by changing speed, up or down.
We have some god awful roads here that will bounce for miles.. repaired ?? sections of concrete and never get them even...so ..can air bags on the truck ..and.."trail air "type pin box help with those conditions ?? Maybe ?? let see what others say..
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Old 10-10-2012, 05:25 PM   #6
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Originally Posted by dretired
We have some god awful roads here that will bounce for miles.. repaired ?? sections of concrete and never get them even...so ..can air bags on the truck ..and.."trail air "type pin box help with those conditions ?? Maybe ?? let see what others say..
Air bags fixed my issue with chucking.

Here's the issue.

Late model trucks have progressive leaf springs which are soft on top "unloaded"
And get progressively stiffer as they compress. This infect gives a better ride unloaded.
What this does is allows a more squishy feeling and induces chucking .

Air bags relieved 90% of mine.

Turbs
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Old 10-10-2012, 05:36 PM   #7
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They've corrected our problem of floating in a boat sensation. I had to readjust the height of my hitch after putting the air bags on. All is now right with the world.
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Old 10-10-2012, 06:32 PM   #8
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Lots of theories as to the cause of chucking. My experience is that it only happens on concrete highways (poured) and it usually disappears when I switch out of the 'slow' lane. Strangely enough, it almost never happened when I was towing our current camper with a Ram 1500. More noticeable now with the F250 on the same roads...go figure!

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Old 10-10-2012, 06:55 PM   #9
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Is what you are decribing as "chucking" a clunk feel and sound when you first takeoff from a stop...or...when driving down un-even concrete repaired *#@&^% !! sections of I-69...I-75...I-96...in ..Michigan ??s
I-69...I-75...I-96....some terrible roads to say the least..I have to be careful when trying to drink coffee on those roads...LOL
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Old 10-10-2012, 07:21 PM   #10
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I-69...I-75...I-96....some terrible roads to say the least..I have to be careful when trying to drink coffee on those roads...LOL
I will try to avoid these roads whenever possible...i am planning a detour away from I-75 south... from Monroe ,Mi... to the Ohio border.. when going to Florida this winter...i would like to hear more from those that have installed airbags in their pick-ups to help with "chucking"...
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