88 K5 vibration (How much yoke play)

[Johnb3]

I have a vibration that starts 15-30 mph (almost feels like the driveshaft is whipping) it goes away and comes back around 55. I replaced the u-joints, checked for play in the pinion yoke and axle bearings and all good also replaced the tailshaft bushing. Tires are OK. I have some radial play in the yoke coming out of the transfer case (208) and would like to know how much if any is acceptable? The shake/vibrations is always there, but sometimes feels worse at the same speeds I mentioned. THIS IS DRIVING ME CRAZY? Forgot to mention acceleration and putting in neutral have no effect on the vibration.

 

[jamber2541]

check the chain in the t-case, may have stretched

 

[Johnb3]

How much play is acceptable? This would cause some slop in the output shaft? I don't have any noise that indicates a stretched chain. Just trying to figure this out. When vehicle is cold the vibration is less, it gets worse after driving for a while.

 

[jamber2541]

1/2 inch of play on the chain is what they say should be max, thats how much mine had, also this could be caused by a bad pinion bearing, do a search on transfer case vibration