1997 yukon clunk

when starting from 0 a loud clunk is heard comming from the back or the middle of the yukon, chnge transfer case oil and differential grease and still have it, hear something about the yoke but no clue on what I need to do.... any help will be beneficial at this point thanks

I have a 2000 and am having the same clunk at movement after stop. My mechanic pulled driveshaft and put grease in trans end of driveshaft which made it quite for awhile 2 or 3 weeks but it came back.

Have you checked for bad u-joints?

Have you checked for bad u-joints?
I had those checked and they were fine. I have actually had 4 mechanics look at it and none could offer any suggestions

Same trouble here, but found the fix. There is a SPECIAL grease you can get at the dealer. I know what you are thinking, I thought it too. My friend had some and it works great for about 8 month to a year and you have to reapply it to the inside of the spline. I wil get the name of it if I can remember. But you can just go to a dealer and ask for yoke grease for a Yukon/Blaser and they should know. It is a very thin brown grease that comes in a blue and white can.