My Model X was in for service for a few things and I mentioned the shudder to them. Here's what they did:
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Concern: Customer states vehicle shutters when acceleration at full throttle from about 30 to
60 MPH.
Pay Type: Warranty
Corrections: Interior NVH General Diagnosis
Both front half shafts will need to be replaced restore proper working due to imbalance.
Corrections: Front Halfshaft Assembly - Front - LH Replaced left front halfshaft and test drove
vehicle.
Parts Replaced or Added
Part Quantity
HALFSHAFT, FR LH, MODEL X (1027111-00 1
-A)
Corrections: Front Halfshaft Assembly - Front - RH
Replaced right hand haft shaft assemble and test drove vehicle.
Parts Replaced or Added
Part Quantity
HALFSHAFT, FR RH, MODEL X (1027115-00 1
-A)