Don't really know where to put this, but here it goes, I noticed when my car is at speed ( say 55mph and above) i get this droning sound, sounds like a "WUMPH WUMPH WUMPH WUMPH" from the rear of the car. I know it needs tires, could this be the issue? I was thinking driveshaft out of balance perhaps?

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Killing the planet, one tank of petrol at a time

Fix the tire problem First. Then see(hear) if there is still a problem.
Frank

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Scrapple: Because a mind is a terrible thing to waste.
73 Duster - Race Car
66 Dart Wagon - DD
178" FED
82 D150
All Slant powered

Maybe swapping all wheels front to rear, see if the sound follows? Pat

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"Louise", a 1976 Dart Custom project, (now sadly reverted to being just an "organ donor" to our other project Darts.)

If the vehicle has a 7 1/4 rear axle, it is likely that the axle bearing(s) need replacement.
DD

Tires were of no help, but how would I find out if I have the 71/4 axle?

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Killing the planet, one tank of petrol at a time

Check out this picture

http://www.moparmailinglist.com/content ... ed/381.jpg

You most likely have a 7 1/4. If it looks confusing under the car, just count out the bolts on the rear cover. A 7 1/4 should have 9. You'll need to identify which side the noise is coming from and pull that axle. Take it down to a machine shop to have a new bearing pressed on. Then go get yourself a seal from an auto parts store. Remove the old seal, install the new seal and then put the axle back in and connect everything back up.

Been through this for the last two years! It's the driveline... If you have a ball and trunion set up it is that for sure. If not just have it balanced($30) and change the trani mout while you're at it.

http://www.slantsix.org/forum/viewtopic.php?t=38191

,Cliff

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'72 4 dr Dart
'63 4 dr Dart