I have a '97 Blazer 4x4 and I found out that the front main seal, timing cover, pinion seal, seal between the trans and transfer case, the rear differential pinion seal, and the front axle seals are leaking. I've noticed some drippage coming from the front so I'd like to get the ones up front replaced first, as far as the others they aren't bad and I am just keeping the fluid topped off. Now I know that the seal between the trans and transfer case requires the tranny to be dropped, but which of the other ones would be fairly simple for a DIY?

 

The one between the t case an tranny...the tranny doesnt have to be dropped, just the t case has to be dropped...its 5 bolts,speedo wire,vacuum switch,trans mount,the drove shafts,and the wire plug for the 4x4 motor and maybe a vent hose and its out just got done doing it on mine matter of fact cracked it open an noticed I needed to replace the chain