vibration
09-23-2009, 11:03 AM
#1
JK Super Freak
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vibration
ok this one might take a little to explain.
i put my new drive shafts on. front is a coast and rear is a Trailmaster. now before i put them on i did not have a vibration. now i do. at first i thought it was my tires. New MTR with Kevlar. they are on 15" wheels. so i aired them down to 32 pounds and the vibration got worse. but once i get up to about 35 mph the vibe almost goes away. now i have not had it over 40 mph since i put the shafts on. i'm working with Trailmaster right now on this. could my alignment be a cause for this. it is off alittle. all of my mods listed in my signature are all recent. any help here would be great.
i put my new drive shafts on. front is a coast and rear is a Trailmaster. now before i put them on i did not have a vibration. now i do. at first i thought it was my tires. New MTR with Kevlar. they are on 15" wheels. so i aired them down to 32 pounds and the vibration got worse. but once i get up to about 35 mph the vibe almost goes away. now i have not had it over 40 mph since i put the shafts on. i'm working with Trailmaster right now on this. could my alignment be a cause for this. it is off alittle. all of my mods listed in my signature are all recent. any help here would be great.
09-23-2009, 12:04 PM
#5
JK Freak
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How does the front pinion angle look? Is the DS within 5° or so of the pinion? I had a bad vibe in my front DS and just recently got a handle on it. Changed the pinion angle by increasing the lower control arm length and lengthening the uppers.
Last edited by RCJeeper; 09-23-2009 at 04:13 PM.
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09-24-2009, 11:17 AM
#9
JK Freak
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I will tell you that though many claim to have no vibe at all, I still have the slightest at 40 mph that I have chosen to ignore. I have shafts rebalanced and rebuilt. There just isn't any way to get past the inability to adjust castor independant of pinion angle. I have had my castor at 2 degrees and still had a slight vibe (though it was less), but you wouldn't wan't to drive it that way. I have also had castor at 5, 6 and 7 degrees. I currently have about 4 inches of lift (3 inch teraflex on a 2 door).
Best of luck, and let me know if anything works.
Best of luck, and let me know if anything works.