Just installed Rough Country 4" lift with TCase Drop On 1997 Jeep Wrangler Sahara. Jeep Shifted in and out of 4wheel Drive Hi and 4 Wheel Low Just Fine before lift. Now after Lift, Four Wheel Drive High still Engages, but four wheel drive low won't go in at all. Sometimes I get a really bad grinding noise like its halfway engaged. Any Ideas as to My Problems? thanks guys.