Despite the foregoing, the independent repair of the manual transmission by an amateur mechanic is not at all an absolutely impossible undertaking. Indispensable conditions are only the availability of the necessary special tools and accuracy in the approach to the implementation of all procedures.
Tools needed to rebuild manual transmissions include needle-nose pliers for removing inner and outer circlips, a bearing puller, a sliding-face hammer, a set of punches and center punches, a plunger-type dial gauge, and possibly a hydraulic press. In addition, of course, you will need a durable, vise-equipped workbench, or a special assembly stand.
During the manual transmission disassembly procedures, try to remember, or rather write down, the installation order of each of the removed parts. The accompanying illustration shows the design of the F23 manual transmission as an example.
The design of the manual transmission F23 (for example)
Before proceeding with the disassembly of the gearbox, it would be wise to try to analyze the symptoms of its failures in order to approximately determine their causes. Many failures are uniquely related to the failure of well-defined components. see also Troubleshooting.
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