Extremely well machined output shaft. Comes with instructions with excellent photos and included tips and tricks to help the process. I did this without removing the transfer case or the front drive shaft and had no problems. I raised the vehicle a few inches on jack stands for more room. Ramps would also work. Some comments regarding the instructions: My tail cone had 4 bolts (the instructions say to remove the 3 bolts holding it on). The instructions point out there is one odd looking bolt among many which hold the case halves together. The instructions call it a 12mm, 12 point bolt but mine was a 10mm bolt and required a 10mm socket. It will be obvious-mine was top center. You will need a 12 point socket for it-I did not have room for a 12 point closed end wrench. Also, that bolt is long enough to stick out beyond the back side of the transfer case so beware those exposed threads may need wire brushing and a shot of PB Blaster or similar. Mine got very tight as I was trying to remove it and I became concerned about the aluminum case ear cracking so be very careful. None of the other bolts stick past the backside of the case. I needed a green scratch pad to help remove the old RTV sealant from the case halves before beginning reassembly. However you remove the old sealant be careful to not scratch the aluminum sealing surfaces. When reassembling, the instructions say to use the original four 10mm X 30mm flanged bolts to reattach the bearing housing. My original bolts did not have flanged heads but after considering it I thought it important enough to have them so I hunted some down at a local hardware store. Something you may want to consider before you begin this project. Also, when reinstalling the bearing housing the output bearing kept unseating itself rearward about 5/16". The bearing is not tightly seated in the aluminum housing but it is a tight fit onto the output shaft. It was so tight of a fit on the shaft that it was over powering the loose fit on the aluminum housing and pushing the bearing rearward beyond the housing. To fix things, I snugged the bearing housing bolts then used a heat gun to carefully heat the inner race of the bearing to the point that it was too hot to touch. Then I carefully tapped that inner race into its place on the shaft using a brass punch in a cross pattern much like tightening wheel lug nuts. Worked very well. The kit includes four grade 8 bolts and lock washers which are for attaching the drive shaft to the drive flange. That's not made clear. The instructions have excellent pictures and a thorough write-up however I thought others may benefit from the few uncertainties I experienced. If you are considering this project, don't be fearful of the process. It is straight forward and with the proper tools, a very satisfying addition.