Drivetrain Noise
#1
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Drivetrain Noise
Just curious if any of you OE guys have experienced the following.
Installed rebuilt motor. Engine running in neutral, everythings good. Put in gear and feel and hear a grumbling/thumping/knocking noise. I adjusted scatter shield to clear drive shaft. Replaced U-joints on drive shaft. Still noise. Removed drive shaft, put in gear, no noise. That would eliminate tranny. Swapped driveshafts no difference. Hand rotate prop which rotates ASD-1600. don't feel any grinding, binding etc. Any help or suggestions would gratly be appreciated.
Installed rebuilt motor. Engine running in neutral, everythings good. Put in gear and feel and hear a grumbling/thumping/knocking noise. I adjusted scatter shield to clear drive shaft. Replaced U-joints on drive shaft. Still noise. Removed drive shaft, put in gear, no noise. That would eliminate tranny. Swapped driveshafts no difference. Hand rotate prop which rotates ASD-1600. don't feel any grinding, binding etc. Any help or suggestions would gratly be appreciated.
#2
Lunatic Fringe
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my borg warner trans with my arnesons make a lot of racket at very low idle speed specially in reverse. Is it just one side? The guy who built mine said it is normal. I have stood in the bilge of a big cruiser with quiet engines and they do make a lot of noise at very slow speed
Jeff
Jeff
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The transmissions make no noise when the drive shaft is removed and I put them in gear. I would think that this would eliminate the transmission as the source of noise/thumping.
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Lunatic Fringe
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have you checked the flex plate for broken springs? I had one come apart years ago, made some funky racket. I only found it when i had an unidentifiable spring in the bilge