Casting in Kokomo, Indiana

Stellantis Kokomo Transmission, Kokomo Casting Plant, and the Indiana Transmission Plant I and II produce ZF 8-speed and 9-speed automatic transmissions for Jeep, Ram, Dodge, and Chrysler vehicles worldwide. Casting demand for transmission cases, valve bodies, and pump bodies in aluminum with precision bore tolerances requires exceptional die casting capabilities. Kokomo Casting Plant is one of the largest aluminum casting operations in North America, producing die cast components for Stellantis transmission and powertrain programs. The scale and precision of Kokomo Casting's production sets the benchmark for automotive aluminum die casting quality in Indiana. Electric vehicle powertrain development at Stellantis, transitioning toward hybrid and full-electric transmission systems, will evolve Kokomo's casting requirements toward motor housing components, reducer casings, and EV-specific powertrain structures as the product lineup transitions.

Kokomo's position within the Indiana automotive supply chain creates casting demand from Tier 1 and Tier 2 suppliers serving the broader Stellantis, Subaru, Toyota, and Honda Indiana manufacturing base with aluminum and iron casting for structural and powertrain applications. Delphi Technologies' Kokomo operations and the broader advanced automotive electronics manufacturing in the city create casting demand for electronic control unit housings, sensor mounts, and automotive electronics enclosures from precision aluminum die casting suppliers. ManufacturingBase connects Kokomo casting suppliers with Stellantis supply chain, automotive OEM, and industrial buyers nationally, extending the reach of Indiana's most concentrated automotive manufacturing city.

Kokomo's casting market is shaped by transmission and powertrain work, where aluminum housings, valve bodies, pump bodies, and related components must hold geometry through casting, heat exposure, machining, and assembly. A small casting defect can become a major functional problem if it breaks through at a bore, sealing surface, hydraulic passage, or fastener boss. That is why suppliers serving this region tend to focus heavily on process control and machining-aware casting design. For transmission-adjacent parts, buyers should identify pressure areas, datum structures, final machining allowance, sealing faces, flatness needs, and any leak test requirement. Die casting may provide high-volume repeatability, but only if tooling, gating, venting, vacuum assist, and thermal management are planned around the critical features. Sand or investment casting may be relevant for lower-volume or specialty components, but they still need the same attention to functional surfaces. Kokomo area sourcing is strongest when the foundry and machining provider communicate early. Many powertrain casting problems appear only after machining exposes porosity or distortion. A good RFQ should therefore include the machined drawing, not just the as-cast model, and should flag every functional surface tied to shift quality, lubrication, or assembly fit.

The North-Central Indiana automotive base is moving through a powertrain transition rather than a simple replacement of old work. Conventional transmission casting knowledge still matters, but hybrid and electric platforms add demand for motor housings, reducer cases, inverter and electronics housings, battery-related structures, and thermal management components. These parts change the questions buyers must ask of a casting supplier. EV-related castings often emphasize lightweight structures, heat transfer, sealing, electrical component protection, and dimensional stability across assemblies. Aluminum remains central, but the acceptable porosity, flatness, cleanliness, and machining requirements can differ from traditional drivetrain castings. A supplier with powertrain history still needs to prove it understands the specific functional risks of electrified components. For Kokomo buyers, the opportunity is to use the region's deep automotive production discipline while adapting to new component categories. ManufacturingBase helps procurement teams find casting suppliers that can discuss both mature transmission work and emerging EV hardware without treating the transition as a generic aluminum casting opportunity.

Kokomo automotive programs are often launch-sensitive because transmission and powertrain components are tied to vehicle production schedules. A foundry can have the right alloy and press capacity but still struggle if it cannot manage tooling readiness, dimensional studies, process capability, corrective actions, and release timing. Supplier qualification has to test the whole launch system, not only the casting sample. Buyers should ask how a supplier handles first article inspection, PPAP-style documentation, tool maintenance, die life tracking, porosity control, leak testing, CMM reporting, and communication with machining or assembly partners. For complex aluminum components, the quality plan should be built around the features that drive function, not around easy-to-measure dimensions. The Kokomo region is valuable because it has long experience with high-volume powertrain expectations. That experience is most useful when procurement teams provide complete technical packages and realistic timing. ManufacturingBase can help structure RFQs so suppliers respond with process evidence, certification fit, and launch support rather than a simple piece-price quote.