Embodiments of systems and methods for confirming fluid fill in automobile subassemblies are described herein. Such systems can include a weigh station to determine if the assembled automobile differential is at an acceptable weight that is indicative of proper fluid fill. A method of detecting a fluid fill condition for an automobile subassembly can comprise transferring the subassembly to a weigh station, applying constraints configured to prevent removal of the subassembly from the weigh station, weighing the subassembly, and determining the fluid fill condition based on the weight of the subassembly.