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Old 02-21-2013, 03:12 PM   #1
joeysz06
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Join Date: May 2012
Location: Littlerock,Ca
Posts: 13
Sounds like rod knocking

I have a 71 gmc with an early 80s 350 and a 3 speed with granny gear. I recently started to get a knocking sound from my truck but only in 2nd and 3rd only when gassing if I let off it stops and if I'm parked in neutral I can free rev with no noise. Any advise on where I can start looking.
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