I need some help about my differentials. I'm looking to replace both differentials but I got lost in the sauce looking for replacement ones. I've been keeping the ones in right now alive, just enough for them to keep functioning. Please tell me what I need to look for so I don't get the wrong ones, thank you.

 

What year is your vehicle? Whats wrong with the differentials? As for replacements both must have the same gear ratio's.