well i took it into the shop today and they called me tonight and told me i would need to come in and take a ride with the mechanic and proove to him it is happening before he will order the part. WTF. i told them it only happened every once in awhile and showed him the TSB but they still want me to drive with the mechanic? this will be the second time it has been in the shop for this and the first time they drove it then told me they could do nothing. and ideas?