Most tesla model x owners are complaining of an acceleration shudder that happens due to a halfshaft alignment design flaw widely acknowledged by all tesla service centers. when it gets worse due to inaction / lack of recall by tesla, serious catastrophic failure can occur while car is in motion. wide spread problem. my issue was first noticed with less than 1,500 miles. service centers seem to have stopped replacing front end half shafts until redesign is done. but no one knows if or when that might happen. tesla needs oversight in this area. google "tesla acceleration shudder model x" and you can read about it from hundreds of owners.