It seems the front differential leak (gear oil) I've been chasing all Winter is NOT the passenger-side axle flange seal... After replacing THAT seal several times, I finally determined the gear oil is actually leaking from the respective differential cover plate. The O-ring behind the cover plate needs to be replaced. To do this, the sub frame needs to be lowered or removed to gain access to some of the 12 T-40 bolts securing the cover (namely the lower ones.) Any advice or insight lowering or removing the subframe?

BTW, I do have a lift and access to an engine transverse support bar...
Thanks!