When installing urethane bushings for the control arm and differential, should they be lubed up while installing? I ask because I know you're supposed to lubricate sway bar bushings when installing those, but I would assume the bushings for the control arms and differential move significantly less so I'm just not sure.

 

Whiteline LCA bushings grease the outer face of the bushing that contacts the mounting flange, the inner race of the rubber portion, and the outer race of the inner metal sleeve.

I usually also lightly grease the bolt and inner race of the sleeve to prevent corrosion.

http://www.whiteline.com.au/lubrication.php

For the diff bush, you only want to grease the outer surface enough to install it without damage.

http://www.whiteline.com.au/docs/ins...des/Z5206A.pdf

Use the supplied grease (lithium moly) for the LCA bushings, but for the rubber OD of the diff I would use a very light coat of lithium or silicone grease without moly, since its an install aid only and you don't want to facilitate any movement in the race after install.