If you are upgrading your radio-controlled model vehicle's rear trailing arms from stock plastic to third-party hop-up aluminium rear trailing arms, what type of grease, if any, do you need where these aluminium rear trailing arms touch the ORV (Off-Road Vehicle) chassis gearbox? In this episode of the RC Deep Dive podcast, we look into the physics of the connection and chemistry of available lubricants to see which, if any, grease is needed in your R/C car, truck, or buggy.