I've had to get the driveshaft balanced eventually on most of the vehicles I have owned. '73 Thunderbird, '85 Suburban, '88 Mustang, '96 Suburban, and now the '59 Dodge. The driveshaft shop does a balance and replaces the U-joints for $80-120 depending on the application. A worn, loose or SEIZED u-joint will make a helluva vibration. By the way, the shop could not balance the Dodge's Ball n Trunion set up because they don't have a way to mount it on their machine. I splurged the extra $200 and had it converted to a a slip yoke/cross U-joint, the way someone else here on the list (or on the web board) had. The only issue with it is that the flange is thicker than the original one, and the studs coming out of the the parking brake assembly are not as long as I'd like. The nuts go on, but not alllll the way. A friend runs an industrial machine shop, and he said he could probably "face" (shave) the think down a bit. Not sure if I want to do that though. Side note: I have a new ball n trunion rebuild kit that I got from Atlas..new in the box. I think I paid $100+ for it, and never used it. They told me they'd take it back, but I have never gotten around to sending it back. Anyone need it? Regards, Lou cpollock@xxxxxxxx wrote: Hello All, Sorry Neil, the reference was for Lou, who I think is the original poster. But, since you bring it up, have you ever found out what IS responsible for your buzzing mirrors? The 69 car used to get into a harmonic vibration at about 125-130. It would literally 'hum' along with a whirrrr....whirrrr...whirrr...pulsing sound. I used to think it sounded like the warp core pulsing on Star Trek Next Generation (if anyone remembers that show). Then I got the driveshaft balanced. Kinda missed the whir. My 73 car is doing it now, and so I decided to keep it that way. I kinda wonder how many cars were built with improperly, or mis-balanced drive shafts??
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