Ok, so I'm narrowing down the sources of a slight vibration upon light deceleration. Like going over a choppy road. The rear end was completely rebuilt, rebuilt entire rear driveshaft, repacked slip yolk... now I'm at the transfer case. I know there is some rotational play in these units, but how about lateral play. I have about .010" of lateral play in the output shaft. Is that right? The manual doesn't specifically address this specification.

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Close up of dial indicator

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casper i was under mine a couple months ago and shook mine like that up and down it moved alot looks like at least triple what your seeing .it looked like a short shaft in the tail housing . i ordered the bearing and seal and was gonna try the shaft slip joint grease thing as well being its never been off.i was gonna post here to see if anyone would check there's for me to reference to since it really wasn't showing me any (bad signs) but it surely worse than yours,how many miles on yours?

 

I've got 243k on it right now. It was worse than that prior to rebuilding the double cardan joint, I figured I'd retest for Sts&Gigls. I know at the outer most part of the transfer case there is a needle bearing, and the actual ball bearing is further in the X-fer case. I'm probably going to do the bearing/seal thing too, as I've had the Ford "update" for this transfer case for close to 8 years now , bout time I put it in.

 

my cardian feels tight but t he out put shaft is moving alot ! whats the update??