Do you have an accurate set of calipers, and accurate torque wrench, a dial indicator and magnetic base, a good carrier bearing puller and/or a set of setup bearings?
Gear setup is a complex operation that requires several non-standard tools. I really would encourage you to seek professional help, unless you're determined to do it yourself and are willing to spend double the cost of professional install for the learning experience. On a Dana 44 you will be pressing pinion and carrier bearings off and on multiple times to get everything right. It could easily take you several days, and unless you have a good bearing puller and press (or setup bearings), you will likely ruin a lot of bearings. You will need to buy a master install kit to get the bearings, shims, gear marking compound, ring gear bolts, etc. that you need. These run about a hundred bucks if you get a good deal.