1999 xj 2wd auto aw4. Friend's jeep. Loaded in park, won't rev past 3800 rpm. Reverse momentary forward then no reverse. Won't roll back unless engine off. Neutral goes forward in first gear. Drive works perfectly. Fluid was low. Topped off, no change. Unplugged TCU. No Change. Checked Linkage, NC. Removed linkage and hand shift in the air, NC. Adjusted TV cable, no change. Drained fluid, dropped pan, no chunks, some shiny bits but not excessive. Nothing looks wrong. Wat now?