OP your fill quantities are incorrect. Refer to your owners manual. The Rubicon front D44 holds roughly 1.4 quarts, the rear about 2.4. In my experience you can¬ít get those amounts into the axles via the fill holes in the covers. When I had stock covers I would add gear oil to the bottom of the fill hole, put in the plug, then put the remainder in via the breather fitting on the axle.
'09 JKRU. 4" Teraflex long arm, Teraflex R44 housing, Teraflex / Fox Resis, Poly Performance skids, Nemesis Billy Rockers, Nemesis flares, 37" ATZ P3s on 17" 5x5.5" Trailready HDs, Spyntec hubs, Teraflex BBK, Mopar BBK master/booster, Superior front & Alloy USA rear axle shafts, CTMs, Reids, Synergy drag link & tie rod, WTOR hydro-boosted steering, 5.38s, TF Dual Rate front bar, TF bumpers, Warn Powerplant, Tom Woods shafts, AA xfer case cable, Kilby canister relo, RH4x4 cage.