Section 110 (Automatic Transaxle Servicing): Identification: Notes
WARNING: This page is about a different car, the 2003 Buick Regal and 2003 Buick Century. However, it is still accessible from the selected car via links, so may be relevant.
Transaxle has a metal identification plate or Service Replacement Transmission Assembly (SRTA) plate attached to rear face of transaxle. See Fig 1 . Transaxle RPO codes are MN7 or M15. Century models, use RPO code M15. Regal models use RPO code MN7 or M15. The MN7 is a heavy duty model and has a 10.2" (258 mm) torque converter. The M15 model has a 9.6" (245 mm) torque converter.