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Allison is the world's largest maker of medium- and heavy-duty fully automatic transmissions for commercial and defense vehicles. It doesn't build trucks — it builds the gearbox inside them, selling to 300+ vehicle OEMs, then earns high-margin service parts for decades. North America On-Highway is ~54% of sales; Defense and its eGen electric axles are the growth edges.

What Allison Transmission Holdings, Inc. really sells

Allison is the world's largest maker of medium- and heavy-duty fully automatic transmissions for commercial and defense vehicles. It doesn't build trucks — it builds the gearbox inside them, selling to 300+ vehicle OEMs, then earns high-margin service parts for decades. North America On-Highway is ~54% of sales; Defense and its eGen electric axles are the growth edges.

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