vibration after lowering?
10-18-2006, 07:40 AM
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vibration after lowering? Is it possible to have changed pinion angle enough to cause vibration even w/ an ~1" drop? No vibration whatsoever on stock springs, prokit caused heavy vibration especially w/ passengers, went to slp level one springs, less vibration but still there. Any suggestions? Thanks. 
10-18-2006, 02:55 PM
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Car has been aligned, twice once w/ each change of springs. Tires have been replaced on stock wheels once, tires and wheels replaced once, after spring change.
10-20-2006, 12:01 AM
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I have that trouble with mine. I personally think they did not align the rear to the front properly with the adj PHR. They just threw it up there like it was any other car. Its goin back soon
10-20-2006, 12:37 PM
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yes, it's possible. I had that same problem and I am only 3/4" - 1" or so lower than stock. My pinion angle was roughly 3* off relative to my tranny tailshaft/crankshaft angle. These angles should be close to equal (within 1*). An adjustable torque arm took care of it as I was able to get these two angles equal to within a degree or so.
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10-20-2006, 01:26 PM
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mine didnt vibrate but it wheel hoped like a mother, get relocation brakets that should fix your problem and incress traction. BTW check your u-joint.
the relocation brakets are the cheapest fix, so try that first.
the relocation brakets are the cheapest fix, so try that first.
10-20-2006, 06:37 PM
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Lowering could bring the rear u-joint / yoke into
interference with the I-pipe if it's poorly hung but
this would be more than just a vibration.
If your torque arm is bent then all bets are off,
driveline angle wise.
interference with the I-pipe if it's poorly hung but
this would be more than just a vibration.
If your torque arm is bent then all bets are off,
driveline angle wise.
10-21-2006, 09:41 AM
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Originally Posted by JR HAWK 9
yes, it's possible. I had that same problem and I am only 3/4" - 1" or so lower than stock. My pinion angle was roughly 3* off relative to my tranny tailshaft/crankshaft angle. These angles should be close to equal (within 1*). An adjustable torque arm took care of it as I was able to get these two angles equal to within a degree or so.
10-21-2006, 09:44 AM
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Originally Posted by RICKY00WS6
The adj torque arm fixed the angle, did it fix the vibration also?
10-21-2006, 02:52 PM
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You might want to take the driveshaft off the
differential and rotate it 180 degrees, just to
see if the vibe improves (things can be off
center slightly and one orientation smoother
than the other).
differential and rotate it 180 degrees, just to
see if the vibe improves (things can be off
center slightly and one orientation smoother
than the other).
