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Old 06-28-2013, 08:27 AM   #80
Keith Seymore
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Join Date: May 2009
Location: Motor City
Posts: 9,291
Re: Pulsing vibration at around 55-65 mph

Quote:
Originally Posted by Redline View Post
Any updates on this issue. I have a 74, k20 350 , 350 trans with same problem. New tires, new ujoints, new drive shaft. Had the back cover off of the rearend no obvious wear patterns. PO did replace 203 with a 205. After replacing extremely loud exhaust with a stock exhaust I noticed it does it also when I press the gas pedal all the way to the floor. It appears the heavy vibration( imbalance) is when the engine is under load. This morning I was in 3 gear and started feeling it at about 55, I down shifted to 2nd and imbalance speed up. This confirms it is not in the tires. Any help is appreciated, even WAG's

Thanks Mike
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Quote:
Originally Posted by y5mgisi View Post
Subscribed. I HATE vibrations...
Please refer to the flow charts at the end of this thread: http://67-72chevytrucks.com/vboard/s...d.php?t=522180

This is the thought process used to fix any vibration.

It's all about separating the potential root causes (so that you know what you don't have to worry about - so you can focus on what you do have to worry about).

K
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