The manual transmission overhaul tasks require the disassembly and subsequent reassembly of many small parts. Taking various measurements of different clearances may require select-fit spacers and snap-rings. The whole process is not easy for a DIYer. Competent folks can remove and install the transmission if trouble arises. However, the overhaul should be left to a professional repair facility. So, the time and expense usually aren't worth it. Further, a rebuilt unit is often offered by dealers or auto parts stores. It is possible for a novice mechanic to rebuild a transmission with some patience, the right special tools and a little attention to detail. Internal and external snap-ring pliers, a bearing puller, a slide hammer, a set of pin punches, and a dial indicator are just some essential tools for the job. Also, maybe a hydraulic press is a good idea, along with a large vise or transmission stand and a robust workbench. While disassembling, one should take notes about the sequence of the parts, their location and how they are fastened. Moreover, knowing which area of the transmission is not working can help provide the right inspection and replacement of components.