*enter Capt. Obvious*
"yea, donuts in 4hi...yea...not the healthiest activity for the jeep. Research indicates such activity is often spurred by large consumption of alcohol and accompanied by great fits of laughter and often filmed by onlookers; (see also: youtube, google video) this usually carries on until something breaks which in turn draws more laughter but subsequently results in said owner (often driver) of the vehicle to curse (see also F@#K!!, S#*T!!) and may also result in financial loss."
on a serious note-ive experienced that very same problem-shifting in causes a grinding noise-or it wont shift out and kinda hangs inbetween like neutral or something or it pops out.this usually occurs if im trying to shift while on an incline....so when i need to shift while on an incline i now put her in neutral and go through that way rather than shift while in drive.