What engine is in a mail truck

The engine used in a United States Postal Service (USPS) mail truck, also known as a Grumman LLV (Long Life Vehicle), is a Ford 6.9L V8 diesel engine. This engine was used in the LLV from 1987 to 2009, when it was replaced by the Grumman Forward Frame (GFF) vehicle.

The Ford 6.9L V8 diesel engine is a 444 cubic inch (7.3 liter) engine that produces 170 horsepower and 400 lb-ft of torque. It is a reliable and durable engine that has been used in a variety of applications, including the LLV mail truck.

Here are some key specifications for the Ford 6.9L V8 diesel engine:

It's worth noting that the USPS has been gradually replacing the LLV fleet with newer vehicles, including the Grumman Forward Frame (GFF) and the next-generation mail truck, the Grumman LLV2. The LLV2 features a more modern design and a more efficient engine, including a 3.0L V6 gasoline engine or a 2.8L I4 diesel engine.