it feels like I have picked up a bunch of little pebbles in my tread.It never rides smooth,not a bad vibration,but im sick of it.The tires have been balanced,the susp. rebuilt and alighned.I dont have new shocks or struts,but have been told these are ok?Could it just be a bad tire.and if so will I have to switch all four to tell?

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~mike~86 IROC-Z

 

It could be the driveshaft is unbalanced. I've had my rear end rebuilt, new tires (balanced very well too), rebuilt the front suspension, and I still have a driveline vibration between 75 and 85 mph. Above and below those speeds, it disappears. It's even causing some minor spark knock from what I can tell since it only happens in 3rd gear.

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Greg Westphal
'87 IROC 305TPI/A4

 

"pebbles in the tread" Maybe a bearing is on it's way out.


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82 camaro--original steering wheel, brake/gas pedals, seats--everything else modified
82camaro

 

replaced both front bearings.could it be a rear wheel bearing?never thought about the driveshaft,but it does it at any speed over 15-20 mph,even under this it feels like im on gravel instead of pavement.thanks

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~mike~86 IROC-Z

 

axle bearings, pinion bearing, carrier bearings are all possible.

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82 camaro--original steering wheel, brake/gas pedals, seats--everything else modified
82camaro