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-   -   Unknown vibration... (https://www.truckforums.com/forum/chevy-silverado-gmc-sierra-forum-11/unknown-vibration-12097/)

98Silverado4Ever 11-13-2009 08:12 PM

Unknown vibration...
 
I have a 98 Silverado 5.7 Vortec Z71 all stock. I get this vibration in my truck when it reaches about 50 mph. I've also noticed that when using cruise control and I happen to be going down a hill the vibration goes away then begins again once the cruise control takes over. When I get on the gas excessively from a dead stop, the vibration comes right away but then disappears until 50 mph. I've had the U-joints looked at and they are OK. A front end alignment was done about 3 weeks ago. Any ideas/suggestions??

dmccartyfan 11-13-2009 08:20 PM

A guess... motor or tranny mounts?

SlimJim 11-17-2009 11:40 AM

My guess is the transmission. I hope I'm wrong. Good luck.

ChevMan92 12-04-2009 01:58 PM

vibration
 
driveshaft could be out of balance

RUFFNECK4LYFE 12-04-2009 10:29 PM

Carrier bearing.


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