i have a leaking front oil seal on the engine side and have and have no clue as how to change it without tearing it completely down is this the easiest way? also have to replace the rear oil seal on the engine side do you do this the same way?

 

Where are the seals? On the differentials or engine?

 

engine looks like im going to hafta press out the u joints to get the nut off didnt want to replace u joints but o well