IDENTIFICATION
Transaxle has a metal identification plate or Service Replacement Transmission Assembly (SRTA) plate attached to rear face of transaxle. (Scheme 1) Transaxle RPO codes are MN3, MN7 or M15. The MN3 and MN7 are heavy duty models and have 10.2" (258 mm) torque converters. The M15 model has a 9.6" (245 mm) torque converter. For model build information on each RPO code (Scheme 2), (Scheme 3) and (Scheme 4).
Scheme 1
Scheme 2
Scheme 3
Scheme 4
DESCRIPTION & OPERATION
Hydra-Matic 4T65-E is a fully automatic front wheel drive electronically controlled transmission. Four forward ranges including overdrive are provided. Powertrain Control Module (PCM) controls shift points using two shift solenoids. A vane-type oil pump supplies oil pressure. PCM regulates oil pressure using pressure control solenoid valve. All vehicles equipped with 4T65-E transmission have an Electronically Controlled Capacity Clutch (ECCC) system. In ECCC system, pressure plate does not fully lock to torque converter cover. It is precisely controlled to maintain a small amount of slippage between engine and turbine, reducing driveline torsional disturbances.
Multiplied torque from torque converter is transferred to transaxle by a sprocket and drive chain (drive link) assembly. Other internal components consist of 4 multiple-disc clutches, roller clutch, sprag clutch, 3 bands and compound planetary gear set. Final drive gear and differential assemblies are an integral part of transaxle. (Scheme 5)
Note. Drive chain may also be referred to as "drive link".
