It's proportional to speed. I measured the angles, they aren't exactly the same but are +/- one degree, which shouldn't cause any problems. The droning is really just over 50 mph or so. I'll have to find the TSBs or article on this! It only became a complaint as the Interstate system expanded and people started driving for longer distances at higher speeds. At least that's my theory as to why it only became a problem around 65-66. If it is a 67 TSB that kind of goes out the window (I'm pretty sure it was 65 or 66 though). Since the 67 floorpan is a minor stretch/widening of the 63-66 it could be a difference with the open driveshaft. I'll find out eventually! On April 12, 2005 Tom Jennings wrote: > On Tue, 12 Apr 2005 farna@xxxxxxx wrote: > > > At highway speeds I get a "droning" sound in my car. I've > > converted from torque tube to an open driveshaft (with a Jag rear > > axle). > > Is the noise proportional to speed, or is it "peaky"? > > How did you set the U-joint angles? > > > > > > . ============================================================= Posted by wixList Archiver -- http://www.amxfiles.com/wixlist