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  #1  
Old July 20th, 2013, 01:48 PM
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Accell/decell vibrations

94 90- when I first accelerate and when I let off have a vibration back end. Was hoping u-joints but when wiggle drive shaft they hold firm and I've got and 1"-1/12" slack to rear end. Dreading thought it might be rings but wanted to see if anyone been through this already with similar symptoms.
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  #2  
Old July 20th, 2013, 02:01 PM
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Check bushings on trailing arms at frame.
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  #3  
Old July 20th, 2013, 02:10 PM
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Landan
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Ah good thought, might explain some of the wondering as we'll.
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  #4  
Old July 20th, 2013, 02:12 PM
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That sounds good.

Alsoake sure all the bolts holding the propshaft are still there. Took ages to spot that problem.
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  #5  
Old July 20th, 2013, 02:23 PM
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you may also gather some thoughts by doing a search for the threads containing "wobble of death" on this site.
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Old July 20th, 2013, 03:00 PM
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Did you check the shafts with the vehicle on Jack stands, or lifted off the ground by other means? The axle needs to be free to spin. (so I guess you could also put everything in neutral)
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Old July 20th, 2013, 03:05 PM
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my d2 developed a bad vibration under load. Jacked it up and no play. Rebuilt front shaft anyway since the double cardon are known to fail due to non serviceable joints. Point is no discernable play but new joints fixed it. I have also had the nuts on the brake drum/shaft work loose and give a vibration like you describe.
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  #8  
Old July 20th, 2013, 05:21 PM
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Appreciate the help. It's the 1.5" prop shaft slack that has me concerned most and why i thinking rings and rear end, then i'm starring down a 10 hr drive to get back home. GBR has had it past several months on another issue but probably best leave again and pick up next go around.

Appreciate all the help/advice
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  #9  
Old July 22nd, 2013, 04:56 PM
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is the rig lifted? If so R U still run'n the stock driveshafts? 90's R known for not liking too much of a lift without other driveline modification. Check the a-arm bushing for slop also.
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  #10  
Old August 26th, 2013, 10:48 PM
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U joints bad, double Harmon Kardon's and GBR shafts cured, hopefully do another 10 years.
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