Download 1999-2004 Cadillac DeVille Service Engine Soon (SES) – Follow the diagnostic and repair procedure below to repair this condition. 1. Remove the transaxle from the vehicle. Refer to the appropriate Service Information for transaxle removal procedure. 2. Remove the torque converter. 3. Install the transaxle to holding fixture. Refer to Holding Fixture Installation SI Document ID #513730. 4. Remove the transaxle side cover, upper valve body and case cover. Refer to the appropriate Unit Repair 5. Inspect the two case cover seals (34 and 35) for uneven wear patterns. 6. Inspect the two case cover seals (34 and 35) for uneven wear patterns. The wear patterns will be evident by a uneven wear pattern of the inner diameter white seal surface as shown in the two above illustrations. 7. Inspect the two case cover seals (34 and 35) for splits/tears and or flat spots. 8. Inspect the support drive socket (400) for wear on the bearing race.