There are no snaprings, only split rings. All you need is a good set of split ring pliers with the knurled duck-bill ends to spread the rings. I use Craftsman.
Need a 10mm 12pt socket for the one odd-ball bolt on the case halves, I usually replace with with a 15mm bolt to match all the others.
CLean all sealing surfaces with a wire brush, then follow up with brake cleaner on a rag. Use the RTV silicone very sparingly, like 1/8" bead and spread evenly with your finger. Less is more, as long as the entire sealing surface is covered. No set-up time required on the RTV.
A little RTV on the yoke splines helps as well.