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Old 06-13-2011, 08:54 AM   #1
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I was wondering if someone that has a Crusier or CTX can tell me how much their pin box moves when you take the weight off of it? When hooked up look at the holes in the mounting plates where it goes up into the underbelly and then look again once you have the weight off the hitch and see if this area has moved. Below is the area I am talking about. Thanks!


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Old 06-13-2011, 09:50 AM   #2
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I have no movement on mine. It might flex some while driving, but not very much.
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Old 06-13-2011, 09:52 AM   #3
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Above is a picture of mine while hooked up. Below is a picture unhooked.






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Old 06-13-2011, 10:04 AM   #4
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My 30SK doesn't move anywhere near that much!! That looks to be an inch or more. I would have it checked if it were mine.
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Old 06-13-2011, 11:04 AM   #5
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Isn't that an air ride pin box, height is going to change depending on weight on the air bag?
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Old 06-13-2011, 11:05 AM   #6
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There is no air ride pin box. It has the Rota Flex pin which is only a rubber isolated pin.



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Old 06-13-2011, 11:15 AM   #7
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That much movement would concern me.
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Old 06-13-2011, 11:25 AM   #8
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ditto on Hunter's remark. I believe those holes are 5/8" diam. and it appears that the differential is 3/8 to 7/16". With all the skin being attached to the frame member that the pin box is anchored too, you should not see that movement. Have it checked out, you may have some broken welds.
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Old 06-13-2011, 11:20 PM   #9
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Are you showing that whole kingpin box is moving or is it the Trail-air kingpin? If it's the kingpin box, I would suggest you get itback to the dealer asap, because it's very likely that youhave a broken weld on thebox mount.

The kingpin on our 5vr flexes some when we're moving but not when stationary.
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Old 06-14-2011, 01:04 AM   #10
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Just measured my unit. It has the standard pin box with the aero cover, so I can't really get a good angle on the bolt holes. But since the new front cap extends further than the front of the pin box, I was able to take measurements from that. The center amber clearance light provides a good reference point and I took measurements on both sides, from the horizontal fiberglas that the clearance light is mounted on to the curved front edge of the pin box. There is a 3/4 inch difference hooked vs. unhooked and the actual numbers were the same on both sides, 14-1/8 inch hooked, 14-7/8 inch unhooked. I certainly would have hoped for less movement. Maybe some other owners will try the same thing.
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