E46 series BMW 3

since 1998 of release

Repair and car operation

Automatic transmission

Specifications

Separate characteristics are provided also in the text of Head and in case of obligation of their performance are allocated with a bold print

General parameters
Type
Models 316i, 318i	4-step, with electronic and hydraulic management and functions of blocking of the ignition key (Interlock) and the selector (Shiftlock), and also adaptive system (Steptronic). The fifth transfer - raising
Other models	5-step, with electronic and hydraulic management and functions of blocking of the ignition key (Interlock) and the selector (Shiftlock), and also adaptive system (Steptronic). The fifth transfer - raising
AT with electronic control of EGS/AGS	A5S 360R Siemens AGS 20 GM 5L 40E
Transfer relations
Transfers 1/2/3/4/5/backing: 1	3.45/2.21/1.59/1.00/0.76/3.17
The transfer relations of the main transfer of models with AT
Models with a back drive
316i	4.44
318i	4.44
320i	3.38
325i	3.23
330i	3.38
320d	3.07
330d	2.81
Models with a full drive
325i	3.23
330i	3.15
330d	2.93
Efforts of a tightening of carving connections
The moments of an inhaling of fixture are given also in the text of Head and on some иллюстрациях*. *vydelenny in the text a bold print the moments of an inhaling are subject to exact observance; the efforts not allocated with a bold print are given only roughly
Beam to the bottom
М8	22 N • m
М10	45 N • m
Box to a beam (М10)	45 N • m
The driveshaft to a box flange
М10, class of durability “8.8”	50 N • m
М10, class of durability “10.9”	60 N • m
М12	100 N • m
Sensors of temperature of a contour of management of transmission
91 °	14 N • m
99 °	14 N • m

BMW of the 3rd series can be equipped with automatic transmission (AT). In the course of a troganiye from a place of AT carries out function of ordinary coupling, and during movement performs work on gear shifting.

The AT main hubs are: torque converter, planetary reducer and hydraulic or electronic control system. Hydrodriving disk brakes and disk coupling are applied to transition to another transfer the relation in a planetary reducer.
The torque converter on the functions corresponds to hydraulic coupling. Its task includes coupling implementation at a troganiye about places and gear shifting without mechanical influence.

Management of effort of pressing when switching carries out the electronic device instead of the hydraulics applied in usual check point. Thus, there is fuller information for better management of switching process that gives the chance to choose the optimum transfer relation depending on a mode of operation of the car and desire of the driver. The considered control system of BMW firm has designation of AGS (Adaptive Getriеbesteuerung) (An adaptive control system of transmission).

The monitor distinguishes till speed from which the pedal is pressed, whether the driver wants to go "is sports" or is economic" and according to it operates a gear shifting point. Whether at management of process of switching resistance to movement is considered also the car uphill or from the mountain, acceleration of braking and movement on turn, for example, moves.

Steptronic – automatic equipment of step-by-step switching

The 5-step automatic transmission near a path of automatic switching has a short coulisse with step-by-step switching. Such switchings are accepted in motorcycle sport.

In Steptronic system the driver can switch transfers at will up or down. In comparison with manual switching the Steptronic system considerably more with comfort also is protected from errors of management. For example, switching of transfer is not carried out, if thereof the most admissible number of turns of the engine is exceeded.

At emergence of malfunctions with entrance signals or with electromagnetic valves switching on the emergency program of work is performed. At the same time, the malfunctions arising in the course of work register in memory of malfunctions. Address to the Section Diagnostics of malfunctions. Work it is desirable to lead HUNDRED in conditions.

For assesment of the work of an automatic transmission and search of malfunctions needs existence of a certain experience. Therefore only removal of a check point and adjustment of draft of the selector here are described. Oil in a check point is replaced only at repair. Oil replacement at carrying out maintenance is not made.

Cars with AT are authorized to be towed only at observance of the established rules, address to Poddomkrachivaniye's Section and towage.