180ft/lbs sounds right. The 2000and up 2wd trucks use a 4wd style hub it needs heavy pressure. The nut is a locking type and is not reusable. While this style is technically non serviceable it can be pressed apart and re-greased. Be careful though I don't think you can get the bearing seals if they get damaged during disassembly.

 

So, on my 2001, I can't grease the front bearings? The drivers side is starting to squeak... and I don't have alot of money.