Hi all, I've had my Model X for almost 13 months, and I have driven almost 40k miles in that time. Last year, I took her in to service due to a problem with shuddering under acceleration. They replaced the half shafts and the shudder went away. I just got her back from service today where they replaced the half shafts and jack shaft again because of acceleration shudder. The problem happened again after about 30k miles. They didn't bother to diagnose root cause, they just slapped new parts on and called it a day. The shudder is gone again, for now, but... I'm worried that it will happen again 30k miles from now (around March of 2019, given my driving habits), and again around December of 2019, and again 30k after that. If this stuff is part of the "drive unit", then I'll be covered for 8 years/unlimited miles. If not, then it's covered only 4 years/50k miles (e.g. September 2018 for me). If I buy the extended warranty, I'll be covered until about December of 2019. After that, if it happens again, I have to foot the bill. And I'm not ok with that. Has anybody worked with Tesla on this? Is there any clarity in terms of how these shafts are classified from a warranty perspective? I suppose I could go the lemon law route, but that won't cover the tinting, PPF, chrome delete, and other extras that I had done to her. In my mind, there really is no reason why this isn't something that can't be truly fixed on my car, if I can get them to do more than just install new parts.