Rear end rebuild needed? video....

[SixStringMadness]

Okay, this is the best way to describe this. Watch the video.....

Someone please guide me in the right direction as to what to fix, how soon do I need to fix it, is this a dealer only or do in my driveway job, etc.....

and please forgive my redneck narration....

EDIT for what it's worth, I just found this on another website, doubt this is my problem, but.......

Bump or Clunk when Starting from a Stop, 4X2 Vehicles:
This may be due the slip yoke on the driveshaft not slipping smoothly. Separate the slip yoke from the driveshaft (index for reassembly) and lube the splines with Motorcraft P/N XG-8 PTFE (Teflon) grease.
TSB 04-26-6
(4X4 vehicle can be fixed in the same manner, although not covered by this TSB)

YouTube - My driveline play/slack

YouTube - My driveline play/slack

[Newman]

Try doing what that TSB says. You never know and its cheaper than a rearend

[SixStringMadness]

Yeah, if I have time tomorrow I think I may get under there a try it, it looks like a simple job. I've actually seen a couple threads elsewhere where a couple guys have put their own grease fittings. This dude has to go the long haul, so I may do that as well. The movement still has me concerned though, I wonder if that movement in the shaft indicates something else I need to address....

[chevytruckk30]

How many miles are on your truck? If its a "open" rear, chances is its the spider gears. When you turn the yoke where the play is, could you feel the gears ketching, almost like theres a bald spot then you feel the gears touch eack other? the spider gears are known for wearing out. Only way to check that is, pull the cover off the diff. let me kno if you need any help or tips

[Thetiler]

I have EXACTLY the same situation
Did you find anything out?

Jason