My 1st gen s10 blazer 4x4 5spd. My pinion seal is leaking obvisouly I have to replace the seal. My question is can i do it without messing with pinion depth, backlash and the crush collar. I was thinking of changing the outter bearing too when i do the seal. Can i change the pinion seal without getting new bearings for the whole rear or a crush collar. because If i can't just change the seal, i am going to change the whole rear end.