1999-2003 F250 & F350 7.3L Powerstroke Complete Transmissions

Your 7.3L Super Duty may be a legendary truck, but it has been on the road for a long time, and its stock 4R100 transmission has likely seen better days—especially if you're rocking extra horsepower and torque. Tier One's built transmissions for 1999-2003 F250 & F350 7.3L Powerstroke trucks are designed to get your Super Duty back on the road and holding far more power than the factory unit ever could. These built 4R100 transmissions come with reliability upgrades to fix common issues like weak mechanical diodes and overheating, allowing you to add powerful tuning, big turbos, and oversized injectors without fear. We have everything from stock-replacement transmissions for towing to competition-ready units that can hold over 1000 horsepower. Even the best transmission build needs a reliable connection to the engine, so if you are piecing together your own build or need a specific stall speed, look at our 1999-2003 F250 & F350 7.3L Torque Converters. Protect your investment from heat while towing by adding one of our 1999-2003 F250 & F350 7.3L Transmission Coolers. If you aren't ready for a complete transmission swap but want to fix shifting issues, a valve body replacement is a great place to start, so check out our 1999-2003 F250 & F350 7.3L Valve Bodies. To get the most out of your new transmission, consider upgrading your fluid capacity or installing a billet input shaft from our section of 1999-2003 F250 & F350 7.3L Transmission Parts.