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  #1 (permalink)  
Old 12-23-2007, 01:24 PM
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Default Speed-bump test...

I just want to know if anyone here has experienced the craziness that happens after driving over a speed-bump at about 10 mph. Once my truck's back wheels clear the bump the back oscillates for a few seconds up and down. I am a member of the 'bed-bounce" community and just want to know if this goes hand and hand with the issue. I recently got to drive a members truck and tried it out because he doesn't have the "bed bounce" issue and lo and behold no oscillations on his CM truck. On a side not he didn't believe me when I told him about the ride quality of my truck but after he drove it his exact words were, "Holy s***, dude, that's not normal."
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Old 12-23-2007, 03:05 PM
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Default Re: Speed-bump test...

My truck does a little wobble if I go over a speed bump at any speed other than the granny crawl. Only 2-3 oscillations then its good to go. No biggie to me.
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Old 12-23-2007, 03:17 PM
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Default Re: Speed-bump test...

Quote:
Originally Posted by TX RN View Post
My truck does a little wobble if I go over a speed bump at any speed other than the granny crawl. Only 2-3 oscillations then its good to go. No biggie to me.
That is how my '07 DC reacts when it goes over a speed bump at speeds greater than 3 mph. My father in law has an '07 CM and his didn't seem to have quite as much vibration. I don't think that I suffer from bed bounce but his truck seemed to vibrate a little less.
My bro has a chevy 3500 and if you hit a speed bump at more than crawling speeds the whole back end bounces around like crazy but that is just because of the stiffer suspension.
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Old 12-23-2007, 03:26 PM
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Default Re: Speed-bump test...

Get the TRD rear Swaybar and be HAPPY . 07 DC LTD TRD with bar added
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Old 12-23-2007, 03:32 PM
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Default Re: Speed-bump test...

OF package would make a difference in how quickly the truck gets settled as well.
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Old 12-23-2007, 04:57 PM
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Default Re: Speed-bump test...

My CM flies over Speed Bumps, I don't slow at all. I can't say the same about my Tahoe.
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Old 12-23-2007, 05:00 PM
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Default Re: Speed-bump test...

Do any one think the TRD package would have helped out with that problem or may be
some TRd shocks that are better than the regular shocks.
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Old 12-23-2007, 05:15 PM
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Default Re: Speed-bump test...

The wobble is a lateral movement of the suspension. I just had the TRD sway bar installed and the next time, (it will be after the 1st of Jan because of all the psycho Christmas shoppers and after Christmas returns), I am in a parking lot I will test the wobble reduction capacity of the sway bar.

Shocks reduce abruptness of the suspension compression and rebound. I don't think the stiffer Bilstein shocks in the TRD package would significantly reduce the lateral wobble. I'm no engineer or mechanic so one of those folks please chime in...
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Old 12-23-2007, 05:21 PM
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Default Re: Speed-bump test...

I reported on this several months ago on a bed bounce thread. My oscillation is quite pronounced at 3-10 mph over 'most' speed bumps. I have an 07 DC 4x4 and have added the TRD Anti Sway bar so the thread above saying this helps is wrong. Logic would have it that the problem lies in the frame stiffness and potentially the rear suspension. the sway bar addresses side to side movement not up and down.
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Old 12-23-2007, 05:44 PM
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Default Re: Speed-bump test...

No wobble here. But I do not have the pronounced bed bounce either.
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Old 12-23-2007, 09:04 PM
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Default Re: Speed-bump test...

Very interesting thread............Am I reading this correctly; no Crewmax on the list???

Crewmax here, (TRD) and no wierdness.
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Old 12-23-2007, 09:14 PM
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Default Re: Speed-bump test...

Here's another DC that does it. It doesn't bother me much though. I'll be installing that "bed bounce fix" (the pad under the tire) soon, maybe that will help.
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Last edited by guntech; 12-23-2007 at 09:21 PM.
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Old 12-23-2007, 10:11 PM
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Default Re: Speed-bump test...

I have several speed bumps on the street in front of my office building. My 07 TRD DC acts quite normal when going over the bumps regardless of speed. It does not have the sway bar.

I have also yet to find any roads that lead to any abnormal bed bounce. Matter of fact, this is the smoothest riding truck I have ever owned or riden in.
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Old 12-23-2007, 10:55 PM
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Default Re: Speed-bump test...

Quote:
Originally Posted by guntech View Post
Here's another DC that does it. It doesn't bother me much though. I'll be installing that "bed bounce fix" (the pad under the tire) soon, maybe that will help.
I hope the fix works for you, gun, I did it already with no improvement on the bumps.
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Old 12-24-2007, 12:04 AM
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Default Re: Speed-bump test...

TRD, crewmax, 4x4 I cross 18 speed bumps daily and I have the
bounce that keeps on giving. Hit them at 35 and they are gone.
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