2003.5-2007 F250 & F350 6.0L Powerstroke Complete Transmissions

The 6.0L Powerstrokes are more than capable of making a whole bunch of extra horsepower and torque, especially after a proper bullet-proofing, but the factory 5R110W transmission can struggle to handle it all. Tier One's built transmissions for 2003.5-2007 F250 & F350 6.0L Powerstroke trucks can hold a ton of extra power while delivering reliability improvements that will help keep your 6.0L Super Duty on the road for years to come. We have built 6.0L Powerstroke transmissions that range from improved towing transmissions for stock power levels all the way to full-on competition 5R110W transmissions that can handle over 1000 horsepower and hard launches at the track. Whether your current transmission is having issues, or if you want to take your 6.0L Powerstroke to the next level, Tier One's built Super Duty transmissions are the way to go! 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 2003.5-2007 F250 & F350 6.0L Torque Converters. Protect your investment from heat while towing by adding one of our 2003.5-2007 F250 & F350 6.0L 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 2003.5-2007 F250 & F350 6.0L 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 2003.5-2007 F250 & F350 6.0L Transmission Parts.