I am attempting to do this with the trans in car to keep from having to drop it, as I don't have any helpers for getting it back in. I already have the drive shaft and cross member dropped, and the tail shaft unbolted. I remeber it being a pain in the ass to get the tail shaft to seperate, but I don't remember exactly what to do. I have to pull out the linkage and remove a cotter pin from the shaft that connects to the shift forks, correct? Trying to get this done soon, quick replies appreciated.
If you're just replacing the seal where the driveshaft goes, you've done way more than you needed to. The seal installs from the outside, so once the driveshaft is out of the way, all you need to do is pry the old seal out, and tap the new seal in. If you've separated the tailshaft housing from the main gearbox, you're going to have to clean those mating surfaces and silicone them back up. If you haven't broken the seal between the tailshaft and main box (you didn't say anything about fluid leaking everywhere so maybe not) Throw the bolts back in it before you do anything else.