Workshop Manual for Volkswagen 02Q 6-Speed Manual Gearbox

Quick guide from the manual

This workshop manual provides detailed technical information and repair procedures for the Volkswagen 02Q 6-speed manual gearbox. It is intended for use by trained mechanics and covers maintenance, repair, and adjustment procedures for the gearbox, clutch, and selector mechanism. Always observe basic safety precautions when working on motor vehicles.

Technical Data

The 02Q gearbox is used in various 4-cylinder engine configurations for the Jetta (2005, 2011) and Golf Variant (2007, 2010). Key technical data, including identification codes, gear ratios, and oil capacities, are provided in the technical data section. The gearbox code can be found on the gearbox housing and vehicle identification plates.

General Repair Notes

• Cleanliness: Flawless repairs require the utmost care and cleanliness.
• Contact Corrosion: The gearbox and clutch housings are made of magnesium alloy. Use only correct, matched bolts and components to prevent contact corrosion.
• Seals and O-rings: Always renew O-rings, seals, and gaskets. Lightly oil O-rings before installation.
• Bearings: Tapered roller bearings must be renewed as a set.

Clutch Mechanism

The manual covers the repair of the clutch mechanism, including the pedal cluster and hydraulic system. Procedures include removing and installing the clutch pedal, master cylinder, and clutch position sender (G476). The hydraulic system requires specific bleeding procedures using brake filling and bleeding equipment.

Selector Mechanism

The selector mechanism repair section details the removal and installation of the gear knob, gaiter, selector cables, and the selector unit itself. Proper adjustment of the selector mechanism is critical for smooth operation and is described in detail, including the use of locking pins.

Gearbox Removal and Installation

Separate procedures are provided for vehicles with turbo diesel engines and petrol engines. These procedures involve extensive preparation, including removing the air filter housing, battery, and battery tray. Support brackets (e.g., 10-222 A) are required to support the engine/gearbox assembly during removal.

Gearbox Dismantling and Assembly

This section covers the internal components of the gearbox, including the input shaft, output shafts, and differential. Detailed instructions are provided for dismantling and assembling these components, including the use of special tools for pressing bearings and gears. Specific attention is given to the modification of the deep groove ball bearing seat in the gearbox housing.

Final Drive and Differential

Procedures for renewing flange shaft oil seals and adjusting the differential are included. Adjustment of the differential requires precise measurement and the selection of appropriate shims to achieve the correct bearing preload.