i lot of the YJ tranny's have that problem, have you driven it for like 15 minutes straight or more, if you let the trans "warm up" the grinding may go away, mine does, its kinda weird but once the gears and fluid get heated up the grinding stops and its smooth shifting all the way around.
'90 I6 258 w/ Weber 32-36 Carb.
32" BF M/T's with cragar rims
5" BDS springs, MORE greasable shackles, XJ driveshaft, AA SYE kit, RE SS brake lines. Bilstein 5150's, 255/70 valving all around, 14" travel in front, 10" in rear.
JF MOTO>>>>"Ban a tard...save a life"
<<<contributed by leftlanetruckin
...gotta get me some of that