Introduction

Introduction


The E46 introduces a new 5 speed automatic transmission manufactured by General Motors Powertrain division of Strasbourg, France. The transmission is designated:
- A5S 360R - BMW Designation
- 5 L40-E: GM Designation

The transmission will be available as an option in both the 323i and 328i models from start of production. The A5S 360R will also be available in the 1999 528i (9/98 production).

System Overview

The A5S 360R transmission offers the following features and benefits:
- The A5S 360R's has a maximum torque rating of 360 Nm.
- Designed and manufactured to provide maintenance free lifetime operation,
- Transmission fluid is designated as "sealed for life".
- Gradual torque converter lock up providing a controlled degree of clutch slippage and smooth transition to full lock.
- Torque converter variable lock up control can occur in 3rd, 4th and 5th gears.
- New GS 20 control system designed and manufactured via a joint effort with BMW, Siemens and GM.
- AGS shift program logic controlled,
- Transmission diagnostics improved due to the new E46 diagnostic concept,
- Drive train management system communication via CAN
- Emergency Program (Safety Mode) activates if certain faults are present

Overview Of Components







The A5S 360R is an assembly of the following:
- Four case housing design (Torque converter bell housing, pump cover plate, main and extension cases)
- Single piece sump pan
- Replaceable oil filter unit
- Four element torque converter assembly with variably controlled lock up clutch.
- Vane type oil pump.
- Four multi-plate drive clutches with single sided friction plates
- Five multi-plate brake clutches with single sided friction plates, Four Free Wheel One Way Clutches (sprag type)
- One Planetary Gearset Assembly
- One Valve Body with solenoids for pressure regulation, shift control, torque converter regulated lock up and reverse lock out (combined function).
- Input, output shafts and drive flange.