Your spindle nut is right had threads and should be torqued to 134 ft. Lbs And lug nuts 80 ft. Lbs. I recommend a penetrating lubricant such as PB blaster and let soak before re attempting so you don't run risk of stripping threads. Apply light engine oil to the seat of spindle nut when you reinstall to prevent future seizing.
〉 Answered on Sep 9th, 2014 by Amanda J. Pierce, MBA "AJ", Certified Mechanic, Project Coordinator; Primavera Scheduler at VIGOR Alaska Industrial Shipyard & BizzM3ch Solutions