right where the deiveshat goes into the diff. is it hard to replace the seal. is it replaceable. do i need a new axel? please help haah

 

It's just a pinion seal and pretty easy to replace. The hardest part is getting the yoke nut off and getting it back on without over torquing and crushing the crush sleeve too much. The seal is about 3-4 bucks. Once you get the drive shaft disconnected check and see if you have a bunch of play in the yoke. You might have a bad pinion bearing since those seals rarely need replaced.