Quote:
Originally Posted by Ultramaroon
If it doesn't make noise it's fine.
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Seconded here. If it's not humming at speed or clunking you're probably ok. Setting up/installing a diff is covered in many videos on YouTube and even a few DIY articles on this site. (video below).
If you're going to fix it yourself and the whole thing is hosed. A used diff + housing and all the rest goes for about $500 on Ebay. It's a direct swap.
If it's just the Ring and pinion/final drive + seals is going to run you about $1400 including labor to fix (unfortunately, I know this first hand).
If you're suspicious about this TAKE IT TO A SPECIALIST or a mechanic that works on differentials all day. Someone that can diagnose it quickly and source parts just as fast. This will likely save you money over a general mechanic who sees a diff 1x month or less.
At 52 seconds they show the backlash being adjusted.
[ame="https://www.youtube.com/watch?v=smbq-vkuIL4"]TOMEI Trax LSD Installation guide by SFR (2 of 3) - YouTube[/ame]