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Old 02-05-2005, 11:55 AM   #1
69 air cab
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vibration problem

I have a 84 chevy that I just installed a new 350 engine (replaced the 305), rebuilt tranny, and rebuilt driveshaft. When I get to about 45 MPG I feel a slight vibration that feels more drive train than tires. I had an expert drive it and he did not feel what I did. He inspected the drive shaft and found everything ok. My tires are new but I think I will take it back for re-balancing.
Anyone experianced something like this? Any suggestions?
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Old 02-05-2005, 12:20 PM   #2
Trimman
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I had the same problem. Is it a long bed? If so it has a long driveshaft that at speed will flex and get out of balance. I had a 2 peice driveshaft made for mine. Thats the only thing that will fix that. I had 2.71 gears at the time so my vibration was at 55mph.
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Old 02-05-2005, 01:20 PM   #3
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Actually it is a short bed.
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Old 02-05-2005, 11:21 PM   #4
Marty 57
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Just because their new tires doesn't mean they are perfect
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Old 02-06-2005, 01:54 PM   #5
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Well, take everyones advice and check the Flywheel, Tires, and even pinion.

Mine vibrates a little because of the angle since I lowered it so severely. All these things come into play. Im not too sure how much damage it will do other than drive you nuts.
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Old 02-06-2005, 03:06 PM   #6
Destructo
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Check your front wheel bearings too, I was getting irritated with a bad vibe in my 85 Shortbed K10 and my front wheel bearing on the passenger side was loose, apparently I didn't install the lock ring right and it backed off.
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Old 02-07-2005, 10:45 AM   #7
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Quote:
Originally Posted by r0lf-
Well, take everyones advice and check the Flywheel, Tires, and even pinion.
I'll second that. See here for how I solved a similar vibration: http://www.geocities.com/kevinshorte.../Flxplate.html


Good luck!
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