Vibration starting at 70mph after 12bolt install
06-15-2007, 01:15 AM
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Vibration starting at 70mph after 12bolt install I have had this vibration for a while now. It starts at 70mph and you can hear it as well. Sounds like a deep vibratins sound. Im running the PST 3.5" aluminium d/s, Spohn crossbrace mounted tq arm and moser 12 bolt. The arm is set at -2. My rear-end is setting back a little because of the relo brackets and non adjustable LCA's. Im not sure if this would cause this but its a maybe. Im also running poly motor mounts and poly tranny mount. Just thought id see what you guys think.
06-15-2007, 08:12 AM
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Not sure if you swapped to the poly bushings at the same time but you will get more noise with them for sure. I suspect your pinion angle is off. At 70 mph and above you start vibrating things.
06-15-2007, 09:29 AM
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Originally Posted by BJM
Not sure if you swapped to the poly bushings at the same time but you will get more noise with them for sure. I suspect your pinion angle is off. At 70 mph and above you start vibrating things.
06-15-2007, 11:19 AM
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The relocation brackets should pull the housing rearward not tilt anything on a torque arm style suspension. My guess is the torque arm mount is not identically oriented to your old axle. You may need an adjustable arm.
06-15-2007, 01:01 PM
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Originally Posted by BJM
The relocation brackets should pull the housing rearward not tilt anything on a torque arm style suspension. My guess is the torque arm mount is not identically oriented to your old axle. You may need an adjustable arm.
06-16-2007, 06:42 AM
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I have the same problem but it starts over 80..the pinion is right on, also there is a horrible clunking and low speed turning..the rear is coming apart next week i'll see whats going to cost me more $ then
