If your trans mount hasn't snapped in half like mine did
![Roll Eyes (Sarcastic)](http://www.ausjeepoffroad.com/forum/images/smilies/rolleyes.gif)
I would leave it. If you replace it and have lift you might get vibes from the tail shaft as you will raise the trans. If it ever gets a knocking noise take off the transfer case bash plate and the noise will go away.