Repairing a manual transmission is a difficult job for a home craftsman. Repair requires the removal and installation of many small parts. Numerous gaps must be accurately measured and, if necessary, modified using selective spacers, shims and snap rings. Therefore, if there are problems with the gearbox, then a motorist can also remove and reinstall it, but it is better to entrust the repair to a specialist. You can try to get a restored gearbox; in any case, the time and money spent on repairs will almost certainly exceed the cost of the rebuilt unit.
However, this does not mean that an inexperienced motorist cannot restore the gearbox at home. To do this, you need to have a set of special tools and work slowly, step by step, so as not to miss anything important.
Tools needed for repair include: pliers for removing and installing inner and outer spring rings, bearing puller, impact screwdriver, set of punches, dial indicator, and possibly a hydraulic press. In addition, a large, sturdy workbench with a vise or transmission stand is required.
As you disassemble the transmission, make careful notes about how each part is removed, where it is in relation to other parts, and how it is held in place.
Before disassembling the gearbox, it's a good idea to have some ideas about where the fault lies in the gearbox. Some problems may be associated with certain parts of the transmission, which makes it easier to check and replace parts. Information about possible causes of failures is given in the section "troubleshooting" at the end of this book.