How do you know when your driveshaft is going.....I have a 2 dr with a 2 inch lift that gave me closer to 3". I have been running this way for close to 50 thousand miles....My rear shaft is still very tight and shows no visible signs of wear or leaking. My front is leaking just a bit of grease at the transfercase and the u-joints at the axle seem to be leaking too.....been this way for about 4-5thousand miles. It is still very tight, no movement at all, no noise, no nothing. Even offroad and disconnected it seems fine....should I worry about it? How do I know if it is going? Shouldn't it have some play in it if it's going?

 

So as long as I have no play I should not worry

 

ditto on what Oleg said