There are two joints shown in the second reference picture. The upper one shown is the cross and trunion type, which is also used on senior Packards, and has generally been unavailable for years in the size used by large heavy cars, which I am guessing is the size used on Imperials also. The one shown in your first reference page is a normal u-joint, with an attached companion flange. This does not have a floating length provision, whereas the cross and trunion type also incorporates a provision for floating length. You can use either type if they both would fit, assuming your car has a center support bearing (and I think it does), so that you don't need the floating length provision in the front part of the driveshaft. Dick Benjamin ----- Original Message ----- From: Imperial 59 <imperial59@xxxxxxxxxxxxxx> To: <mailing-list@xxxxxxxxxxxxxxxx> Sent: Thursday, May 23, 2002 7:54 PM Subject: IML: More '59 Questions Well I now understand why I have a u-joint between the tranny and driveshaft instead of the trunnion thing... What I don't understand is which one is right. One driveshaft looks like this: http://sbryan.home.mindspring.com/newpage1.htm The other one looks like the bottom picture here: http://www.imperialclub.com/repair/lit/master/114/page07.htm Anyone know which is correct for a '59? Could they both be correct just from different production dates? I haven't been able to find the u-joint from the page07.htm. I have found the u-joint for the first one but would have to change the parking brake drum to use that drive shaft. I would prefer to fix the one that should have been on a '59 to begin with. It might make up for the junkyard electronic ignition I installed :-) Steve B.