I would definitely not use lithium-only grease for this application; you need grease with a molybdenum additive, the same grease as is in the grease sachet that comes with a CV joint boot kit. I cannot recall offhand whether LM grease has this, but if it is dark greyish-black in colour, it almost certainly has. It will tell you on the tin. HOWEVER... your friendly local motor factor will sell you a pot of CV joint grease for not much more than the ordinary stuff.