Going to sell the stock 3.31 gears and differential it is not a posi and the muffler w/ stainless tip. Looking to get $200 for everthing shipped. The 05 4.0 muffler would make a stock 3.8 sound better and anybody needing new rear end here is a set of 3.31 with only 3000 miles on them they look brand new. The diff and gears will fit any 7.5 from like 1980 forward and would be an upgarde for anyone running a 7.5 rear end. Don't pass the up if your interested and don't want to spend $200 pm me we will talk. If you only want the rear end setup or if you only want the muffler pm me. Taking all offers into consideration. I am figuring the muffler is worth $20 and the rear end gears and diff $150 and considering shipping is $30. If shipping is more I am eating it. If you want them seperate the muffler $35 Shipped and the gears and diff $175.00 shipped. I know it cost $50 to ship gears/diff so any way it's a good deal and new gears would cost you more than this gear and diff. shipped.