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  #16  
Old 08-11-2010, 01:24 PM
ZWilson07 ZWilson07 is offline
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Default Re: Vibration in the rear-end

im not gonna lie, it mightttttt, but more than likely not. Its prolly going to be one of those lil grimlins that you never seem to get a 100% perfect. I know I have a few, like vibrration, clunk when shifting, and I guess its just from the 4.10 gears but the clunk and pull of letting out my clutch at certain rpms gets kinda rough and unenjoyable sometimes beens I have a manual. When I first got the truck I would drive myself insane over all of them and spend tons of time n money and didnt really get nowhere. Just like my front is 1/2 inch lower then my rear even tho they are about maxed, and even my left and right front isnt perfect, their still likw 1/4 to 1/8 inch off of each other but I just learn to let it go. Turn up the music and try not to pay attention to the lil grimlins, best decision ive made in awhile about it honestly.
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  #17  
Old 08-11-2010, 10:44 PM
PaulBennett PaulBennett is offline
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Default Re: Vibration in the rear-end

I"m fighting a similar problem and becoming convinced the shocks are bad.
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  #18  
Old 08-12-2010, 09:22 AM
Chris Chris is offline
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Default Re: Vibration in the rear-end

If my issue was smaller, I'd not be so concerned, but its so bad my seats rattle, whole truck sounds like its falling apart on the inside. It's an awful vibration its also even when I go to stop, the truck hops as if the rear brakes are not catching completely. I just wanna figure out what is causing this, because it came out of no where. I was told everything to broken belts, to u-joints.

My tires are brand new, no broke belts. My rims aren't bent because the tires balance fine. The u-joints could be bad, but I'd like to think they'd at least feel loose if I got up under there, but the drive shaft is tight as can be to me. The shocks are in great shape. They make no noise, nor do they sound bad at all. They don't appear to be broke, in fact nothing on my rear-end does. I doubt it'd be my rear differential but it could be I suppose. I am just unsure about this.

I was wondering though if anyone knew for sure if the actual brake drum around the outer edge being chipped on one side would throw that rear end out of balance, and cause this?
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  #19  
Old 08-13-2010, 03:05 AM
PaulBennett PaulBennett is offline
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Default Re: Vibration in the rear-end

How about raising the rear wheels off the ground with jack stands, securely blocking the front wheels, and running up to 30 or so mph with a quick-witted friend in the driver's seat? This should test the running gear such as U-joints and safely allow observation of what may be causing the problem.
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  #20  
Old 08-13-2010, 03:18 AM
01_ranger_4x4 01_ranger_4x4 is offline
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Default Re: Vibration in the rear-end

Quote:
Originally Posted by Chris View Post
If my issue was smaller, I'd not be so concerned, but its so bad my seats rattle, whole truck sounds like its falling apart on the inside. It's an awful vibration its also even when I go to stop, the truck hops as if the rear brakes are not catching completely. I just wanna figure out what is causing this, because it came out of no where. I was told everything to broken belts, to u-joints.

My tires are brand new, no broke belts. My rims aren't bent because the tires balance fine. The u-joints could be bad, but I'd like to think they'd at least feel loose if I got up under there, but the drive shaft is tight as can be to me. The shocks are in great shape. They make no noise, nor do they sound bad at all. They don't appear to be broke, in fact nothing on my rear-end does. I doubt it'd be my rear differential but it could be I suppose. I am just unsure about this.

I was wondering though if anyone knew for sure if the actual brake drum around the outer edge being chipped on one side would throw that rear end out of balance, and cause this?
i dont think that a chip out of the drum would cause an imbalance because its so close to the center of rotation but since you say it hops/ vibrates when you brake i would def pull the rear brakes apart and clean and adjust them. i did brakes on my ranger a few years ago and i adjusted the rear a little too tight and at speed the truck would vibrate and hop because the rear brakes got hot from them dragging and they started grabbing while i was going down the road. it seems at this point youre grasping for straws so it wouldnt hurt to check it out. otherwise it sounds like youve exhausted every other possibility.
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  #21  
Old 08-13-2010, 08:21 AM
Mirage Mirage is offline
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Default Re: Vibration in the rear-end

I'm still betting on a u-joint. But you also have a problem with the brakes. Are the rears adjusted properly? I'd check that out before you tear them apart. The adjusters should be accessable from a small rubber plug in the back of the mounting plate. Make sure the E-Brake is off. Jack the car up on one side and rotate the tire while adjusting. You want to just feel a slight drag on them, then stop adjusting. Do the same for the other side. (If you have any kind of locked rear end you may have to jack up both sides at once).

You may also have to pull the wheel and drum off to make sure the adjuster is in the right location (or not installed backwards... been there done that...).
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  #22  
Old 08-13-2010, 08:37 AM
mickblock mickblock is offline
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Default Re: Vibration in the rear-end

Next time you get the shudder turn off the overdrive. This will change the speed of the driveshaft and not the wheels, so if the vibration changes
then it's driveshaft related. If it keeps up it's in the rearend or wheels.
Obviously it's easier to perform this test if you have a manual trans.

You mentioned setting it off when you touch the brakes? Shoot just start there!
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Last edited by mickblock; 08-13-2010 at 08:40 AM.
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  #23  
Old 08-13-2010, 08:52 AM
01_ranger_4x4 01_ranger_4x4 is offline
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Default Re: Vibration in the rear-end

Quote:
Originally Posted by mickblock View Post
Next time you get the shudder turn off the overdrive. This will change the speed of the driveshaft and not the wheels, so if the vibration changes
then it's driveshaft related. If it keeps up it's in the rearend or wheels.
Obviously it's easier to perform this test if you have a manual trans.

You mentioned setting it off when you touch the brakes? Shoot just start there!
turning off the OD will only change the RPM of the motor, not the drivetrain.
__________________
2001 Ranger 4x4 Stepside
-RCD Suspension lift
-33x12.5 BFG KM2's on Mickey Thomson classic locks
-4:56 gears
-Auburn gear LS
-James Duff traction bars
-Headers
-Flowmaster duals
-SCT X-Cal2 and some small exterior mods

http://www.cardomain.com/ride/2321189

2005 F-150 Lariat 4x4
-LED third brake light
-Weathertech floor liners
-Edge tuner
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  #24  
Old 08-13-2010, 09:05 AM
Ron0104 Ron0104 is offline
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Default Re: Vibration in the rear-end

Quote:
Originally Posted by Chris View Post
If my issue was smaller, I'd not be so concerned, but its so bad my seats rattle, whole truck sounds like its falling apart on the inside. It's an awful vibration its also even when I go to stop, the truck hops as if the rear brakes are not catching completely. I just wanna figure out what is causing this, because it came out of no where. I was told everything to broken belts, to u-joints.

My tires are brand new, no broke belts. My rims aren't bent because the tires balance fine. The u-joints could be bad, but I'd like to think they'd at least feel loose if I got up under there, but the drive shaft is tight as can be to me. The shocks are in great shape. They make no noise, nor do they sound bad at all. They don't appear to be broke, in fact nothing on my rear-end does. I doubt it'd be my rear differential but it could be I suppose. I am just unsure about this.

I was wondering though if anyone knew for sure if the actual brake drum around the outer edge being chipped on one side would throw that rear end out of balance, and cause this?
Chris, Who whoooo!!!!!!!!!!!!! I fixed the vibration problem on my Ranger.
Took it to a shop ealier this week that specializes in Dynamic balancing. They checked and found 3 of the tires were out-of round. They shaved them (keep in mind my tires are very new), balanced all 4 wheels and the Ranger has a better than new ride now. It was more than worth the $ 72.00 it cost me to have this fixed.

The synopsis of my trials to fix the vibration is, keeping in mind my truck has 140K miles on, the rear wheel bearing was bad, and I felt it. But that did not contribute to the vibration. The Universal joints may have also been on the dry side, and I know I have a good drive train system now for many miles to come.
Weird thing is 2 weeks ago I took my Ranger back to the Tire place where I bought them, and asked them if I can see the tires on the balancing machine. When I questioned them about the hopping out of round they said it was “normal” it flattens out on the road. And they were wrong.

In your case it sounds so very much like tires being out of round as well, but yes make sure the propshaft U-joints are good, also lift the rear of the vehicle up, wheels clear, and slightly apply the handbrake or foot brake so the brake shoes start to take on the drum. In this way you should be able to feel if they are out of round.
If your front rotors are worn and buckled, the vibration will only occur when you apply brakes.

Also, regarding the chip out of the rear brake drum, it depends on the size of the chip broken out. I'd say if it is the size of a quarter, then replace the drum. Make sure, if you get one from a scrap yard, that the diameter matches the other wheel. (i.e if it has worn or been machined out). I always prefer buying drums, shockes, etc in pairs and new.
But the vibration you describe does not sound like it could come from that drum.

Let us know what happens
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  #25  
Old 08-13-2010, 09:15 AM
mickblock mickblock is offline
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Default Re: Vibration in the rear-end

Quote:
Originally Posted by 01_ranger_4x4 View Post
turning off the OD will only change the RPM of the motor, not the drivetrain.
Oh yeah. I was thinking of a way to do that test with an automatic.
Geez, I really said that? Thanks LOL!
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  #26  
Old 11-21-2011, 12:13 AM
cstishenko cstishenko is offline
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Join Date: Dec 2010
Posts: 25
Default Re: Vibration in the rear-end

Sorry for bringing up an old thread... it was indeed the tires?

I have the same issue. one set of 31" duratracs. one set of 33" duratracs.

I have a feeling it is warped brake drums.

the hop vibration happens around 60kmh right upto 80

The truck only has 50,000 km on it.

07 fx4 4.0
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