I just replaced the front actuator for the second time now and am thinking of buying the posi-lok system to replace the actuator. After spending over 160 dollars for the actuators, I have heard the posi-lok kit is a much better option. Has anyone tried one of these kits yet? My Tahoe is a 97. And the light blinks in 4hi but the axle actuator does not engage. Only the transfer case actuator does.