If one or more teeth on the flywheel are missing or broken, the whole flywheel should be replaced. Replacement ring gears may be used in place of a new flywheel for V10 or Diesel Engine models, but you need to follow exact steps to stop damage from occurring. Begin by finding out the position of the old gear on the flywheel by drawing lines with a scriber. With an abrasive cut-off wheel, cut the old gear mostly through at one place and then remove what's left by striking it with a cold chisel or punch. Since the ring gear attaches by shrink fit to the flywheel, it has to be warmed to expand it for the installation process. You should heat the whole gear, using an enclosed oven at about 375°F to make sure the heat is even. Do not heat it with an oxy/acetylene torch, since the heat will not be even and can quicken wear of the gear. When working with a hot ring gear, always use goggles or safety glasses and heat-resistant gloves. Make sure to spread out the heated gear evenly so it doesn't become distorted or crooked by adding it slowly using a shop press and the right press plates. Set the flywheel on a workbench and let it cool while the ring gear inside is still exposed to normal shop air. Water is not allowed for cooling, since fast cooling can damage the new gear.