Sounds like I'm gonna be better off trading it in or just fixing what I have

Anyone have any suggestions on where I can get info on rebuilding the rear diff. I am a marine mechanic so I could stumble my way through it. I have some other projects I need to do on it so I figured I could ask, the car has 175k so he needs some tlc. Thanks for any info I can get

I'm sure it's not as easy as I'm hoping but my rear diff is on its way out and having moved from nj to fla I no longer need the awd for the snow. Could it be as easy as pulling the driveshaft and rear axles or is the transfer case a limited slip style case? I was going to remove the driveshaft from ...