Overhauling a manual transmission is a complex process for the DIY home mechanic. This job entails taking apart and putting together many small parts, measuring spaces with accuracy and where necessary adjusting them through choice of shims and spacers. Getting internal transmission parts may be difficult and they may also be very expensive. Therefore, if there is any fault or noise in the transmission, it is better to have the entire unit overhauled by an expert repairer or to get a replacement reconditioned unit. Nevertheless, with special tools on hand and careful step-by-step execution that excludes nothing, this task does not pose an impossible challenge for a more experienced mechanic. Among the necessary tools for an overhaul are circlip pliers (both inside and outside), bearing pullers, slide hammer, pin punches set, dial test indicator and perhaps a hydraulic press. It will also be necessary to have a large solid workbench and vice. As one works to dismantle the transmission notes should be taken on how each part fits so as to make reassembly easy and correct. It is therefore useful to know which part of the gearbox is faulty before embarking on its disassembling since certain faults can be directly related to specific sections making it easier to inspect components for wear or damage.