I needed a universal joint replaced in my SRT-6 driveshaft. I did find a joint, and was about to attempt to replace on my own. (I did have a plan on proper centering). However, I decided to call a local driveline place, and they proposed using my driveshaft as a model to build a completely new shaft, with replaceable/greaseable u-joints, new center bearing, boots and flex joints. It turns out, they already had a model for the Limited, and an associated part number. Now, having used my shaft, there is now a part number for an SRT-6, also! No more worrying about u-joint issues, just buy a whole new shaft, and if, in the future the u-joint fails, you can replace it yourself. Here's what you need to know:

Base/Limited (manual or auto): 2891-436N $474.06 (includes new flex discs)
SRT-6: 2891-437N, $540.05 (includes new flex discs)
Replacement u-joints: 1-0153G

Order from:
Panhandle Driveline
3984 Avalon Blvd
Milton, FL 32583
(850) 983-6150
Ask for William, tell him Neil Emiro from ND Performance sent you.

Remember, this is a brand new driveshaft. They will ship it directly to you, and you will NOT need a core, so less downtime for you. Pic of my new driveshaft attached. Notice the snap rings in place for the u-joints