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Vibration Search Continues

I've been getting vibration on decelleration from about 75 untill 90 when it turns into a constant vibration untill I hit 105 plus at which point it goes away. I'm fairly sure it's a driveshaft vibration. I have 4.10's in there and before those went in I would get the same sort of vibration at 110 plus. The car is lowered and because it only happens on decelleration from 75-90 I figured the pinion angle might be the cuplrit but after getting adjustable lca's installed the problem persists. I have not gotten an adjustable panhard bar but I think my next move will be to get the driveshaft balanced. I was on the fence about it since it seemed like it'd be more likely to be a pinion angle issue as a result of lowering. Anyways becuase it happened before the new gears ever went in, and at one point I took it to a dealership who put in a new driveshaft (it made the vibration less severe yet still apparent) I'm hoping a driveshaft rebalance will solve my problem. Anyone have any thoughts?

RE: Vibration Search Continues

Quote:

ORIGINAL: Stewart

I've been getting vibration on decelleration from about 75 untill 90 when it turns into a constant vibration untill I hit 105 plus at which point it goes away. I'm fairly sure it's a driveshaft vibration. I have 4.10's in there and before those went in I would get the same sort of vibration at 110 plus. The car is lowered and because it only happens on decelleration from 75-90 I figured the pinion angle might be the cuplrit but after getting adjustable lca's installed the problem persists. I have not gotten an adjustable panhard bar but I think my next move will be to get the driveshaft balanced. I was on the fence about it since it seemed like it'd be more likely to be a pinion angle issue as a result of lowering. Anyways becuase it happened before the new gears ever went in, and at one point I took it to a dealership who put in a new driveshaft (it made the vibration less severe yet still apparent) I'm hoping a driveshaft rebalance will solve my problem. Anyone have any thoughts?

First off, you're talking about acceleration when going from 75 to 90, not deceleration! Secondly, have you removed the retaining lock clips from the one lug stud of each wheel? You might want to try that first.

RE: Vibration Search Continues

I mean decelleration, when I get anywhere between 75-90 and let off the gas I get the vibration. If I'm accelerating from 75-90 there is little to no vibration. Which is why I thought it might be the pinion angle, becuase under load it should snap it within spec I would imagine and then when not under load the angle would change and cause the vibration. At elast that's what I thought.

No I haven't removed any retaining clips. I assume those could potentially cause wheel vibration? The vibration I'm getting is definitely a drivetrain related issue. Thanks for the tip though.