[rfuerst911sc]

OK what's the deal with posi units ? Brand new prices from 170.00 to 500.00 or more . Aftermarket vs OEM ? New vs used ? Do they all basically work the same ? Are they all rebuildable if needed ? My knowledge base is zero so can only go up .

I can hear a slight noise/whine in the current rear axle . It could be the gear set or could be a wheel bearing . It is not constant it seems to be around 40-45 mph . On throttle and off . My point being if I move forward with a posi I will also do axle bearings to be safe .

How DIY friendly is setting up the diff ? Axle bearings do you need a press ? I know there is shimming involved and some kind of grease/goop to see gear tooth engagement . Any advice appreciated .