GENERAL INFORMATION

Specifications

CAUTION

Individual specifications are also given in the text of the chapter, and where their observance is mandatory they are printed in bold

General Data Type: 4-speed (or 5-speed), all forward gears synchronized. Final drive located in the transmission housing. Designation: 01M. Fluids Used: Automatic transmission type ATF ESSO EGL 71 141 or AUDI–ET No. G052 162 A2 (light yellow). Capacity: Drain and refill 3 L; Total 5.3 L. Automatic transmission final drive oil 0.8 L, synthetic oil G052 162 A2…SAE 75W90. Haldex clutch oil for all-wheel drive models 0.2 L; Haldex clutch oil specification G 052 175 A1. Tightening Torques: Fastener tightening torques are given in the text of the Chapter and in some illustrations*.

*Torques shown in bold in the text must be strictly observed; torques not in bold are approximate. AT mounting on engine: M10 bolts 60 Nm; M12 bolts 80 Nm. Torque converter to drive plate 60 Nm. Starter to transmission 60 Nm. Left mount bolt to transmission 25 Nm. Left mount bolt to bracket 60 Nm. Front mount bolt to bracket 60 Nm. Transmission cover bolt 15 Nm. Drive shafts to AT flange 45 Nm. AT fluid filler plug 15 Nm. Haldex clutch drain plug (all-wheel drive models) 15 Nm. Haldex clutch filler plug (all-wheel drive models) 30 Nm

AT Sectional View

Automatic transmission clutch design 1 roller one-way clutch 2 reverse gear brake clutch 3 4th gear input clutch 4 1/3 gear input clutch 5 reverse gear input clutch 6 2/4 gear brake clutch 7 torque converter lock-up clutch

Drive gear 1 – locking pin with socket head 2 – cup washer 3 – adjusting shim 4 – tapered roller bearing inner race 5 – tapered roller bearing outer race 6 – transmission case 7 – thrust needle roller bearing 8 – tapered roller bearing outer race 9 – tapered roller bearing inner race 10 – drive gear

Drive gear 1 – locking pin with socket head. 2 – transmission case. Cup washer. 3 – screw 4 – hex nut 5 – driven gear 6 – tapered roller bearing inner race 8 – bolt 9 – bearing cap 10 – adjusting shim 11 – parking lock gear 12 – bearing thrust ring 13 – O-ring 14 – drive gear oil seal 15 – tapered roller bearing outer race 16 – tapered roller bearing inner race

Final drive assembly AT 1 – transmission case 2 – speedometer drive 3 – output shaft with drive flange 4 – O-ring 5 – adjusting ring 6 – drive flange oil seal 7 – tapered ring 8 – thrust washer 9 – compression spring 10 – drive flange 11 – cup washer 12 – snap ring 13 – cover 14 – locking element 15 – screw 16 – cover 17 – snap ring 18 – cup washer 19 – drive flange 20 – compression spring 21 – thrust washer 22 – tapered ring 23 – drive flange oil seal 24 – bearing housing 25 – O-ring 26 – output shaft/drive flange 27 – differential 28 – screw 29 – locking element 30 – snap ring 31 – snap ring 32 – gasket 33 – cover 34 – screw

Park lock gear AT 1 – bolt 2 – manual selector valve control 3 – selector shaft with selector segment 4 – spring pin 5 – connecting lever 6 – detent segment 7 – lock washer 8 – bolt 9 – selector segment spring 10 – bolt 11 – O-ring 12 – washer 13 – detent lever pivot 14 – return spring 15 – detent lever 16 – park lock gear 17 – bolt 18 – retaining plate 19 – guide plate 20 – O-ring 21 – multi-function transmission range switch 22 – bracket 23 – bolt 24 – transmission case 25 – O-ring 26 – vehicle speed sensor 27 – bolt 28 – bolt 29 – transmission speed sensor 30 – O-ring 31 – O-ring 32 – breather hose 33 – breather 34 – breather cap

Planetary assembly AT 1 – retainer 2 – O-ring 3 – thrust needle roller bearing washer 4 – thrust needle roller bearing 5 – thrust needle roller bearing washer 6 – bearing housing with installed driven gear 7 – driven gear 8 – retainer adjusting shim 9 – washer 10 – bolt 11 – spacer sleeve 12 – gasket 13 – cover 14 – bolt

Valve body assembly AT 1 – plug 2 – overflow tube 3 – oil pan 4 – bolt 5 – magnet 6 – spacer sleeve 7 – gasket 8 – ATF screen 9 – bolt 10 – gasket 11 – valve body 12 – bolt 13 – O-ring 14 – conductive bus bar with connector 15 – retainer 16 – wiring harness connector 17 – connector retainer 18 – nut 19 – solenoid valve connectors 20 – sealing plug 21 – O-ring 22 – O-ring 23 – manual valve actuating rod

Instead of a manual transmission, the AUDI A3 may be equipped with a 4-speed automatic transmission (AT). When starting off, the AT performs the function of a conventional clutch, and while driving it performs gear shifting.

The main components of the AT are the torque converter, the planetary gear set, and the hydraulic or electronic control system. To change to a different gear ratio in the planetary gear set, hydraulically actuated multi-plate brakes and a multi-plate clutch are used.

By its function, the torque converter corresponds to a hydraulic clutch. Its role is to provide clutch engagement when starting off and when shifting gears.

Shift pressure control is performed by an electronic control unit instead of the hydraulics used in a conventional manual transmission. Thus, more complete information is available for better shift control, which makes it possible to select the optimal gear ratio depending on the operating conditions of the vehicle and the driver's wishes, which in turn improves shift quality.

There are no manual "Economy" or "Sport" programs. The control unit recognizes from the speed at which the accelerator pedal is pressed whether the driver wants to drive "sporty" or "economical" and controls shift timing accordingly. Shift control also takes into account driving resistance, for example whether the vehicle is driving uphill or downhill, whether a trailer is attached, and headwind.

If faults occur in the sensor or solenoid valve signal circuits, the transmission switches to the emergency operating program, and the faults are simultaneously stored in the fault memory. They can be read from the control unit memory later.

Appropriate AT experience and qualifications are required to evaluate operation and to correctly locate faults.

CAUTION

Vehicles with AT may be towed a distance of up to 50 km at a speed not exceeding 50 km/h. When towing on a transporter, the front of the vehicle must be raised.