I checked out bassboatcentral and watched a video under the trailer forum and it showed everything i asked about. The only thing it didnot answer was what kind of grease to use. Thanks for all the help
A marine grade grease works fine. Walmart has a Pennzoil Marine grease I've used for years.
I too switched my cool hubs to grease. The cool hubs were not a good application for boat trailers, and a pain in the rear!