Took the L back for the alignment on Monday, and to fix the "pop" noise heard when making certain turns. After a day, they cant figure it out, so I am in a Lincoln Town Car. I gave them some of the postings from threads on this part replete with part numbers, and who to call at SVT Tech line, and we will see what happens. At least they seem like they are making an effort. Should have the truck back Wednesday evening at the latest, they say.