The clutch delay valve (CDV) is only in play when the clutch pedal is being released. Once the clutch is engaged, there is no impact. The effect of the CDV is to potentially alter the timing to when the clutch engages, by slowing the return flow rate to the clutch master cylinder (delaying the engagement if you let the clutch pedal off too quickly).

If you are driving steadily, with your foot off the clutch, there is no impact from the CDV.

Sounds more like motor mounts, or a transmission mount. Could still be related to the clutch disk, if the torsional springs are bad. Doesn't sound like a transmission problem. Possibly a transfer case problem.

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2007 X3 3.0si, 6 MT, Premium, White

Retired:
2008 535i, 6 MT, M Sport, Premium, Space Grey
2003 X5 3.0 Steptronic, Premium, Titanium Silver
2002 325xi 5 MT, Steel Grey
2004 Z4 3.0 Premium, Sport, SMG, Maldives Blue