Automatic Transmission Servicing: Identification: Notes

Transaxle has a metal identification plate or Service Replacement Transmission Assembly (SRTA) plate attached to rear face of transaxle. See Fig 1 and Fig 2 . Transaxle RPO codes are MN3 or MH1.

Fig 1: Locating Transaxle ID Plate & SRTA Plate Information (4T65-E)

Courtesy of GENERAL MOTORS CORP.

Fig 2: Locating Transaxle ID Plate & SRTA Plate Information (4T80-E)

Courtesy of GENERAL MOTORS CORP.