Only If the front axle is disabled will front CV out be silent. If power is applied and one corner has no load that corner will spin like the wind. Usually the spine will try to grab you'll get a gnashing of teeth not friendly sound.

If the TC has the front disabled then front is not part of the equation anymore.

The people that have had any front axle disabling issues usually report the 4x4 icon on the dash so I'm quite curious about the no errors claim.

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2011 E70 • N55 (me)
2012 E70 • N63 (wife)