afroman006
1/2 ton status
I'm doing 56" front springs in my project trail bitch and the one major problem I've seen people having is the front driveshaft. Micah and a couple others from Austin are the ones that come to mind. Now, I was brainstorming this and came up with a brilliant idea, the dual CV rear shaft from a Cadillac. I'm prety sure its only a 1310 but for the price of a boneyard shaft, I think its a fairly cheap sounding choice. Here's my ultimate plan for a front driveshaft on a 56" equiped rig with ~12" droop.
Cadillac CV's at each end. I dont know their range of motion but logically, it has to be better than a plain 1310 u-joint. I've also seen on the boards that someone suggested using the splined portion of the intermediate rear driveshaft from a 2 piece shaft. I am going to try this because, I have several of these shaft lying around. I'd like to avoid square tube but may do it eventually if all else fails. So, Caddy CV's at both ends with the splined portion and yoke from a 2 piece rear shaft. Finding tubing and fabricating all this wont be a problem for me, I have the facilities. The only problem I can forsee is the yoke on the 2 piece driveshaft is a 1350, but the CV is a 1310. I figure I can either resolve this by running a combo u-joint (less desireable) or maybe finding a 2 piece rear shaft in a half ton longbed 2wd (more desireable- I have one of these as a parts truck so we'll see what it has).
If you see any problems with my logic or have any ideas, lets hear em.
Cadillac CV's at each end. I dont know their range of motion but logically, it has to be better than a plain 1310 u-joint. I've also seen on the boards that someone suggested using the splined portion of the intermediate rear driveshaft from a 2 piece shaft. I am going to try this because, I have several of these shaft lying around. I'd like to avoid square tube but may do it eventually if all else fails. So, Caddy CV's at both ends with the splined portion and yoke from a 2 piece rear shaft. Finding tubing and fabricating all this wont be a problem for me, I have the facilities. The only problem I can forsee is the yoke on the 2 piece driveshaft is a 1350, but the CV is a 1310. I figure I can either resolve this by running a combo u-joint (less desireable) or maybe finding a 2 piece rear shaft in a half ton longbed 2wd (more desireable- I have one of these as a parts truck so we'll see what it has).
If you see any problems with my logic or have any ideas, lets hear em.
--I looked a the shaft again--it APPEARS to have some sort of ball and socket joint in between,on my 76 caddy coupe deville one at least....I wonder if they were wrong?? 
