The Navistar T444E is a diesel V8 engine manufactured by Navistar International Corporation. In its use in Ford Motor Company trucks, vans, and school buses, it is the first of the Power Stroke family of diesel engines. The T444E was manufactured from 1994 to 2003, replacing the 7.3L IDI V8 designed by International Harvester. As a result of its inability to meet California noise regulations, the T444E was discontinued midway through the 2003 model year, replaced by the all-new 6.0L VT365. In total, nearly 2 million 7.3L Power Stroke V8s were manufactured for Ford at Navistar's Indianapolis, Indiana, plant before switching to the 6.0L.

The T444E used a bore and stroke. Power output was at 3000rpm and at 1600rpm for 1994-1997. Power was increased in 1998 to at 2600rpm and of torque at 1600rpm. In 2000, power was once again upped to at 2700rpm with automatic transmission and with manual transmission, and of torque at 1600 rpm.

Applications:

• 1994.5–1997 Ford F-250 HD, F-350, and F-Super Duty

• 1999–2003 Ford Super Duty (2001–2006 in Australia)

• 2000–2003 Ford F-650/F-750

• 2000–2003 Ford Excursion

• 1995–2003 Ford E-Series (E-350, E-450, and E-550)

• 1994–2003 International 3400/3600/3700/3800 bus chassis

• 1996–2003 International 3000 bus chassis

• 1994–2003 International 4700/4900 cab/chassis

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