# Introduction – SSP 237 Manual Gearbox 02T

> The modular system of the 02T gearbox (clutch release lever, selector shaft, inner selector module, bearing support) and its magnesium housing.

- Web page: https://catalog.polo.blue/self-study/ssp-237-manual-gearbox-02t/introduction/
- Original document (PDF): https://cdn.polo.blue/files/SSP237-Manual-gearbox-02T.pdf

## The modular system

Individual modules are assembled in modular form. This increases their functionality after assembly in series production and in the service workshop.

The modules are:

### Clutch release lever

![Clutch release lever (237\_040)](https://catalog.polo.blue/instructions/ssp-237/d882269167a7d357.webp)

This module contains the clutch release lever, the release bearing and the guide sleeve.

### Selector shaft with selector mechanism cover

![Selector shaft with selector mechanism cover (237\_041)](https://catalog.polo.blue/instructions/ssp-237/eda5291e15b24876.webp)

All blocking detent, spring and guide elements of the selector mechanism, as well as the angle piece for adjustment of the selector mechanism are accommodated in this module.

### The inner selector module

![The inner selector module (237\_042)](https://catalog.polo.blue/instructions/ssp-237/4150a756f0dc01ea.webp)

with shift forks, selector plates and bearing.

### The bearing support

![The bearing support (237\_043)](https://catalog.polo.blue/instructions/ssp-237/1bfd35a307c10cf9.webp)

with the two grooved ball bearings and pre-assembled powertrain and output shaft.

## The housing

is made from magnesium and consists of 2 parts (gearbox housing, clutch housing). The gearbox housing is sealed off from the exterior by a cover.

The fixing points for the left assembly mounting bracket are located at the top of the gearbox housing. The attachment points for the self-aligning bearing support are located at the bottom of the gearbox housing.

In comparison with aluminium, magnesium has a lower density and therefore also lower strength. This was compensated for by thicker ribbing and increased wall thickness.

The result is a mass reduction of 2.5 kg compared to the conventional aluminium construction.

> **Important**
>
> The lower material density of the housing necessitates increased bolt screw-in depths.
>
> To protect the housing against electrochemical degradation, the bolts are coated (see SSP 192, page 36/37).

![The housing (237\_039)](https://catalog.polo.blue/instructions/ssp-237/d0ea00f13bb0d80c.webp)