Automatic Transmission/Transaxle: Description and Operation: Overview

Automatic Transmission 01P, Overview
There are several fundamental differences between the 4-speed automatic transmission 01P. These changes are briefly mentioned below.

Transmission
The 4-speed automatic Transmission 01P is equipped with 4 hydraulically activated forward gears. When the lock-up clutch in the torque converter is closed these forward gears become mechanically driven gears by eliminating the torque converter slip.

Torque Converter
The torque converter is equipped with a lock-up clutch. The lock-up clutch is closed dependent on load and speed and drives 1st, 2nd, 3rd and 4th gears mechanically independent of slip.

Control Module -J217- With Driving Situation Gear Changes (Fuzzy Logic)
Driving situation adaptation takes place automatically.
Advantages:
- Gear changes will be consistent with better fuel economy.
- Maximum engine output is always available
- Individual adaptation of gearchange points in all driving situations
- Gear change points are infinitely variable

Gear Change Point Variations For Hills
An additional gear change map automatically selects gear changes for hills dependent upon Accelerator Pedal position and driving speed.
- Gear change map for extreme uphill stretches is matched to engine output
- Gear change map for extreme downhill stretches is matched to the braking effect of the engine