front differential

Hi I'm new to the form and the teryx family Just bought a 2015 teryx 800 love this machine BUT...my front differential (drivetrain) got destroyed a buddy put it into 4WD when I had one of the front axle out replacing the boot and we'll needless to say the diff broke apart and I'm pissed lmao...

i recently acquired a 2013 teryx 750 the previous owner informed me that the 4x4 did not operate i figured i would replace the front diff but when i went to pull the diff out it has a front diff out a 2015 teryx that custom mount brackets were made for but was never wired in i'm trying to...

Need some advice. I was washin my teryx the other day noticed my front diff leakin grey glittered oil. I got to inspecting the leak and found a quarter size whole in the bottom of the front diff. It's covered by skid plates so i couldnt of hit it on anything, I never put it in any kinda bind...