I haven't seen anyone suggest this was differential noise yet... I used to get a howling rear end once in a while. The last one was in my 71 Ford LTD and I always figured it was in the ring gear or pinion. It seems to be when I got to highway speed and traveling when no under a hard pull. I never changed it or tried to adjust or anything, just made sure it had plenty of lube. It stayed together for me. I just figured it was slightly our of adjustment or something. It seemed to have a little slack in it. But that's where I figured my noise came from. Seems like I had similar noise in a couple earlier Ford, also. one was '59 1/2 ton PU and other was '54 Ford 2 door. All had quite a few miles on them. Just an idea, maybe... ______________________________________________________________ Ralph Ausmann - Hillsboro, OR - > <ralph.ausmann@xxxxxxxxx> http://mysite.verizon.net/res79g4m/ ... and "check the links" ----- Original Message ----- From: "Jay" <jciampi@xxxxxxxx> Subject: Re: [Amc-list] Droning sound in 66 American >I had the u-joints replaced and that didn't fix it. I did turn the > driveshaft 180 degrees and bolt it back on. No real help, it changed the > speed at which the drone started. it moved up the speed . > Jay _______________________________________________ Amc-list mailing list Amc-list@xxxxxxxxxxxx http://www.amc-list.com/mailman/listinfo/amc-list