Brandon,
We use Redline CV-2 or Swepco 101 Moly, your choice.
I take the joints off the axles to clean & reassemble. Lay flat on cardboard, then wrap a 36mm socket with plastic and insert into the tube ... instant grease gun that fits the cage of the cv joint. Use a long extention on the socket to get the last bit out of the tube!
Works great, only takes a few seconds and minimal clean up!
TxT