Ford Super Duty 4R100 Transmissions & Transmission Parts

The big 7.3L Powerstroke under the hood of your 1999-2003 F250 or F350 can make impressive levels of power with relatively few modifications and performance diesel tuning, but that doesn't mean that your stock 4R100 transmission can handle it, especially after over two decades on the road. Tier One's built 4R100 transmissions for 1999-2003 Super Duty trucks can handle huge levels of power and aggressive applications so that you can push your 7.3L Powerstroke as hard as you need when you're towing, hitting the trail, down at the sled pull, or ripping down the drag strip. Our lineup of Super Duty built transmissions drop right into place of stock, making them perfect for both truck overhauls and performance builds. Also check out our 4R100 rebuild kits or our other Super Duty performance parts and accessories! Contact Tier One with questions or for custom builds!