Has anyone else had issues with the undercarriage on Cat 247b2 shifting up and in at the drive motor to the point that the track rubs on the belly pan / fender. Dealer has checked many times and says everything within specs. Am I the only one that this has happened to? Any ideas? Only happens on right side. May be the cause of the inner drive sprocket stress cracks? I demoed a new 247b3 and the track was very close to the belly pan at the drive motor on it as well but further away from belly pan at front of unit? Looking forward to input. Thanks!