IDENTIFICATION
Transaxle has a metal identification plate attached to rear face of transaxle case. (Scheme 1)
Scheme 1
DESCRIPTION & OPERATION
Hydra-Matic 4T40-E and 4T45-E are fully automatic 4-speed transaxles consisting primarily of a 3-element hydraulic torque converter and converter clutch. Transaxle uses a variable capacity vane-type oil pump to supply all hydraulic pressure needed for operation.
Multiplied torque from torque converter is transferred to transaxle by a sprocket and drive link assembly. Other internal components consist of 5 multiple-disc clutches, 2 roller clutches, a sprag clutch, 2 bands and 2 planetary (carrier) gear sets. Differential and final drive assemblies are an integral part of transaxle. (Scheme 2)
The Hydra-Matic 4T40-E and 4T45-E transaxles are equipped with 2 electronic shift solenoids, a pressure control solenoid and Torque Converter Clutch (TCC) Pulse Width Modulated (PWM) solenoid. The Powertrain Control Module (PCM) utilizes these solenoids to control shifting, hydraulic pressures and TCC apply and release.
Note. For diagnosis of transaxle electronic control system on Daewoo models, see appropriate DIAGNOSIS article.
