I'll second the nod to not screwing with the angles until you do the lift. You've got a couple of factors working against you right now. One, the 14b is physically longer than the 10 bolt you pulled out. That changes the angles by forcing the shaft to be shorter and make the angles tighter. The noise you are getting on decel is the vibrations coming on when the pinion angle drops under load. Seems pretty slight, but I darn near chucked my stock shaft with the same problem. Keep driving it and this is what it's going to do:
I can tell you right now you'll need to go to a CV shaft. SYE or with a slip yoke. SYE will net you a longer shaft and less angles, but it can be done with the slip. I went with the slip yoke style CV shaft. You'll have to point the pinion at the t-case as the CV joint will take care of the angles. Meaning you'll need to get the pinion set so it has no working angle. Your best bet is to set that at the time of the lift install out back.
Here's my driveshaft I had built with the slip yoke and 1350 joints throughout.
I ended up using DIY4X 8 degree shims to point the pinion up with my 4" ORD flip and stock springs. You will need to take the measurements first to see if you need a different amount of correction to get the pinion angle and driveshaft angle to match. We also dropped the t-case 1/4" to aid in flattening out the angles slightly.
I can tell you right now you'll need to go to a CV shaft. SYE or with a slip yoke. SYE will net you a longer shaft and less angles, but it can be done with the slip. I went with the slip yoke style CV shaft. You'll have to point the pinion at the t-case as the CV joint will take care of the angles. Meaning you'll need to get the pinion set so it has no working angle. Your best bet is to set that at the time of the lift install out back.
Here's my driveshaft I had built with the slip yoke and 1350 joints throughout.
I ended up using DIY4X 8 degree shims to point the pinion up with my 4" ORD flip and stock springs. You will need to take the measurements first to see if you need a different amount of correction to get the pinion angle and driveshaft angle to match. We also dropped the t-case 1/4" to aid in flattening out the angles slightly.
