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Automatic Transaxle Diagnosis - 4T40-E & 4T45-E: Application Pontiac Sunfire I

Automatic Trans 1 illustration

APPLICATION

WARNINGVehicle is equipped with Supplemental Inflatable Restraint (SIR) system. When servicing vehicle, use care to avoid accidental air bag deployment. SIR system-related components are located in various locations throughout interior and exterior of vehicle, depending on application. Do not use electrical test equipment on or near these circuits. If necessary, deactivate SIR system before servicing components. See AIR BAG DEACTIVATION PROCEDURES article in GENERAL INFORMATION.
Application (Body Code)Transaxle Model (RPO Code)
Alero & Grand Am ("N")
2.2L4T40-E (MN4)
3.4L4T45-E (MN5)
Cavalier & Sunfire ("J")4T40-E (MN4)
Malibu ("N")4T40-E (MN4)

TRANSAXLE APPLICATION

Transaxle has a metal identification plate attached to rear face of transaxle case. (Scheme 129)

Scheme 129

Scheme 129: TRANSAXLE
Scheme 129: TRANSAXLE

CLUTCH & BAND APPLICATIONS

Selector Lever PositionSolenoid Position (1-2/2-3)Elements In Use
"D" (Drive) 1st GearON/OFFForward Clutch, (1) Input Sprag & (1) Low Roller Clutch
"D" (Drive) 2nd GearOFF/OFFForward Clutch, (1) Input Sprag, (3) Low Roller Clutch, 2nd Clutch & (1) 2nd Roller Clutch
"D" (Drive) 3rd GearOFF/ONDirect Clutch, Forward Clutch, (1) Input Sprag, (3) Low Roller Clutch, (2) 2nd Clutch & (3) 2nd Roller Clutch
"D" (Drive) OverdriveON/ONDirect Clutch, (2) Forward Clutch, (3) Input Sprag, Intermediate-4th Band, (3) Low Roller Clutch & (2) 2nd Clutch
"3" (Manual 3rd) 1st GearON/OFFCoast Clutch, Forward Clutch, (1) Input Sprag & (1) Low Roller Clutch
"3" (Manual 3rd) 2nd GearOFF/OFFCoast Clutch, Forward Clutch, (1) Input Sprag, (3) Low Roller Clutch, 2nd Clutch & (1) 2nd Roller Clutch
"3" (Manual 3rd) 3rd GearOFF/ONCoast Clutch, Direct Clutch, Forward Clutch, (1) Input Sprag, (3) Low Roller Clutch, (2) 2nd Clutch & (3) 2nd Roller Clutch
"2" (Manual 2nd) 1st GearON/OFFCoast Clutch, Forward Clutch, (1) Input Sprag & (1) Low Roller Clutch
"2" (Manual 2nd) 2nd GearOFF/OFFCoast Clutch, Forward Clutch, (1) Input Sprag, Intermediate-4th Band, (3) Low Roller Clutch, 2nd Clutch & (1) 2nd Roller Clutch
"2" (Manual 2nd) 3rd Gear (4)OFF/ONCoast Clutch, Direct Clutch, Forward Clutch, (1) Input Sprag, (3) Low Roller Clutch, (2) 2nd Clutch & (3) 2nd Roller Clutch
"1" (Manual Low) 1st GearON/OFFCoast Clutch, Forward Clutch, (1) Input Sprag, Low/Reverse Band & (1) Low Roller Clutch
"1" (Manual Low) 2nd Gear (5)OFF/OFFCoast Clutch, Forward Clutch, (1) Input Sprag, Intermediate-4th Band (3) Low Roller Clutch, 2nd Clutch & (1) 2nd Roller Clutch
"1" (Manual Low) 3rd Gear (4)OFF/ONCoast Clutch, Direct Clutch, Forward Clutch, (1) Input Sprag, (3) Low Roller Clutch, (2) 2nd Clutch & (3) 2nd Roller Clutch
"R" (Reverse)ON/OFFLow/Reverse Band & Reverse Clutch
"N" or "P" (Neutral or Park)ON/OFF(2) Input Sprag & Low/Reverse Band
(1) Holding. (2) Applied but not effective. (3) Overrunning. (4) 3rd gear is only available at vehicle speeds greater than 62 MPH. (5) 2nd gear is only available at vehicle speeds greater than 37 MPH.
(1)Holding.
(2)Applied but not effective.
(3)Overrunning.
(4)3rd gear is only available at vehicle speeds greater than 62 MPH.
(5)2nd gear is only available at vehicle speeds greater than 37 MPH.

CLUTCH & BAND APPLICATIONS

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