Hey guys, having a problem again with grinding noise coming from drivers front. I replaced both hub assemblies and both actuators last year bout this time and no noise during warmer months. Now at 9 deg outside my noise is back. Just wondering exactly where yall are talking about I can disconnect vacuum line in order to drive without further damaging anything until I can get vacuum tester to figure out if leaking or not. Do you think it maybe my solenoid? I took hoses off solenoid with engine running and they still have vacuum while off is this normal? Thanks for any help!!!