Re: driveshaft play
As for it being solid in Park sometimes, this makes sense to me. It all depends on if the d/s is preloaded, ie holding the vehicle on a slight incline. If it is, you of course won't feel any play. You always want to check for d/s play w/the vehicle in neutral and parking brake set, preferably on a level surface :-) It could be any of your 3 rear u-joints or the slip shaft. IME, it's normal to have some play at the t-case output and of course you'll see some play at the pinion itself, this is just the ring gear/pinion backlash. What you DON'T want is play anywhere in the d/s ITSELF. Truthfully, the VERY BEST way to do this is spend 5 mins to remove the d/s entirely and then check it all out. I had a ton of play in my CV (double cardan) that I couldn't feel until I dropped the shaft and tried to twist it by hand.