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Violent bouncing in the rear of truck even on small bumps.

  #1  
Old 12-13-2012
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Violent bouncing in the rear of truck even on small bumps.

I have. 99 ford ranger super cab 4x4 with. 3.0. It has new shocks within the last 10k. Whenever I go over a set of bumps or pot holes nothing even that serious the truck violently bounces from side to side, to the point where yesterday I went over a few on completely dry pavement and I almost lost control of the truck from fish tailing nit even under acceleration. Has anyone experienced this or offer any insight on what might be causing this ?
 
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Old 12-13-2012
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Check your shocks to make sure the bolts are still in, what kind of shocks did you buy?. and check the leaf springs to see if one of them is broken. Also check the shackle mounts, they are know for rusting out on your year of truck.
 
  #3  
Old 12-13-2012
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What littlered said. Also check the ubolts holding the leaf springs, double check the shocks that you put on to make sure they are the right length /part number for your truck, make sure the shock bolts are tight as well. Did this violent shaking start happening after you replaced the shocks, or was it fine for a while, and then it randomly started losing control over bumps??

In the meantime, when you go over bumps try to just coast over them, instead of accelerating or putting on the brakes. Braking over bumps will take up your suspension travel before you hit the bump, making it actually ride rougher. If you accelerate while going over bumps, the rear axle wrap will be even worse than it already is on our lightweight trucks and your back end will jerk around like nobodies business lol.

Also check your lugnuts to make sure they are properly torqued...my 4x4s should be at 100 ft lbs.
 
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Old 12-13-2012
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They came with the truck so I don't know the shock type. What are the shackle mounts ? I will check the shock bolts tomorrow on the lift
 
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Old 12-13-2012
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crawl under and just look at the suspension. my bet is something is broken or rotting off. the way you are describing it i get the feeling the axle is trying to walk side to side
 
  #6  
Old 12-14-2012
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Originally Posted by APU6speed View Post
They came with the truck so I don't know the shock type. What are the shackle mounts ? I will check the shock bolts tomorrow on the lift
The shackle mounts are what attach the back of the leaf springs to the frame.
 
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Old 12-14-2012
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I have the same problem.
My 95 was bad but tolerable, my 03 since the lift $ucks bad.
On the hy-way at speed it,really gets,hairy.

I added 200lbs of sand for the winter and it is riding better.
I thought my prob was the new rear springs but maybe not...

If everything under the truck is ok add some weight in the bed and see if that helps.
 
  #8  
Old 12-28-2012
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mine is the same. you need at least two hundred pounds in the back . Sensatrack shocks might help too
 
  #9  
Old 12-29-2012
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My truck is very horrible at taking bumps, unlike all the Ranger's I've got at work. I never figured out if it's because the shocks are worn, I've got bigger tires, no weight in the rear (all the work tucks have about 500+ lbs in the rear), or anything else.

I just take it as it is and hope nothing is broken. lol
 
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