Selector Lever; Torque Converter - Fiat Bravo Service Manual

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Table of Contents

S E L E C T O R L E V E R

To select a gear, use the selector lever located on the central console, which comprises a safety button

(2) to protect against accidental gear engagements. It is connected to the automatic transmission via a

flexible cable, and it acts on the valve unit and on an electrical device through which a coded electrical

signal indicating the lever's position (P, R, IM, D, 3, 2, 1) is transmitted to the control module.

The following positions may be set using the selector lever:

The drive wheels are locked (the engine can be started)

Reverse ratio (the reversing lights come on)

Neutral position (the engine can be started)

Automatic operation of the gearbox on all four ratios

Automatic operation of the gearbox on the first 3 gears (the change to 4th gear is i n -

Automatic operation of the gearbox on the first 2 ratios (the change to 3rd and 4th

gears is inhibited)

Operation only in 1st gear (with engine braking effect)

T O R Q U E C O N V E R T E R

The purpose of the torque converter is t o hydraulically transmit power from the engine to the gearbox,

and to increase the torque when the vehicle is accelerating. The rotary motion is transmitted t o the

epicyclic gearing through t w o shafts:

- the gearbox main shaft w h i c h engages in the hub of the converter turbine.

- the layshaft which engages on the lock-up clutch;

The converter comprises (see figure on next page) a pump P connected to the crankshaft, a turbine T

connected to the gearbox main shaft, and a stator S connected to the gearbox outer casing. The c o n -

verter is filled completely w i t h oil w h i c h , because of the kinetic energy impressed upon it by the pump,

permits the transmission of the driving torque.

Auto transmission and differential

Components and operation

1. Selector lever

2. Safety button (to prevent accidental gear

3. Lever position display

4. NORMAL/SPORT

switching over from N O R M A L mode to

SPORT mode and vice versa)

5. ICE button (for driving on slippery roads)