auto differential gear

What is your manufacturing process: We disassemble the gearbox first, clean, conduct a life assessment (hardware type, like housing, pulley, cylinder), improve defects (like valve body, oil pump, chain cylinder), replace original parts (seals, size repair kits), conduct a local inspection, install, test, then check the internal parts, replace the damaged parts, use the machine to test the quality of the parts, install them perfectly and finally test the performance. Company