A friend of mine just striped out his splines a month ago. His rincon is an 06 and has been used and abused. After removing the shaft the splines were rusted to hell. I don't think I read anybody talking about the eighth inch vent tube at the bottom of the differential. That goes directly to the splined area to eliminate suction , if not vented with a hose will washout any grease in that area. I think that is what everybody is talking about.
2007 rincon W/GPScape. 3000 Warn winch W/rope on front,4000 Warn winch W/cable on rear and wireless remote,custom winch switches, BIG GUN exhust and fuel control,RD lift,Garmin GPS,full custom skids W/bush guard,12 SS chrome W/28 -10s Gorilla on all 4 corners,custom 1 1/4 in reciever W/tow hook,BRGR gears,K/N filter,2 in snorkel.
2007 Rincon camo, 12in ITP rims (black), 26in mudlites ,the rest stock for now.