Overhauling a transfer case is a challenging task for a do-it-yourselfer, requiring the disassembly and reassembly of numerous small parts, with precise measurements of clearances that may need adjustment using select-fit spacers and snap-rings. While a competent individual can remove and install a transfer case, the overhaul is best left to a transmission repair shop, as the time and expense involved often surpass the cost of a rebuilt unit, which may be available through dealer parts departments and auto parts stores. An inexperienced mechanic can successfully rebuild a transfer case if equipped with the necessary special tools and approaches the job methodically to avoid overlooking any details. Essential tools for the overhaul include internal and external snap-ring pliers, a bearing puller, a slide hammer, a set of pin punches, a dial indicator, and possibly a hydraulic press, along with a large, sturdy workbench and a vise or transmission stand. During disassembly, it is crucial to take careful notes on the arrangement and installation of each piece, as this will facilitate the reassembly process.