1999-2003 F250 & F350 7.3L Powerstroke Parts & Accessories

The big 7.3L Powerstroke under the hood of your F250 or F350 Super Duty is a legend for a reason, capable of racking up a million miles and making impressive power. However, the aging 4R100 transmission behind it is often the weak link that holds this truck back. Tier One has everything you need to unleash the horsepower and torque hiding away in your tough truck while ensuring your drivetrain can handle it. We have a full lineup of built 4R100 transmissions that can hold huge levels of power and handle tough applications on the road, out on the trail, or at the track. We also carry a wide range of performance parts, including 7.3L Powerstroke cold air intakes, tuners, and lift kits to take your build to the limit. If you don't see what you're looking for, contact Tier One or call 602-399-5484! If your factory transmission is slipping or you are pushing serious horsepower, a stock replacement just won't cut it, so take a look at our 1999-2003 F250 & F350 7.3L Complete Transmissions. The factory converter is often the first weak point to fail when you start adding torque, but you can put more power to the ground without shuddering by upgrading to one of our 1999-2003 F250 & F350 7.3L Torque Converters. Heat is the number one killer of the 4R100, especially when towing heavy loads, so keep your fluid temps in check with our 1999-2003 F250 & F350 7.3L Transmission Coolers. Sloppy shifts and pressure issues are common on high-mileage trucks, but you can restore crisp operation with our 1999-2003 F250 & F350 7.3L Valve Bodies. Finally, whether you need a billet input shaft for strength or a deep pan for capacity, find it in our section of 1999-2003 F250 & F350 7.3L Transmission Parts.