Automatic Transaxle Overhaul & Testing - 4T40-E & 4T45-E: Identification: Notes

Transaxle has a metal identification plate attached to rear face of transaxle case. See Fig 1 . Transaxle RPO code is MN4 for 4T40-E and MN5 for 4T45-E.

Fig 1: Locating Transaxle Identification Information (Typical)

Courtesy of GENERAL MOTORS CORP.