6R140 Complete Transmissions

If your Super Duty's 6R140 transmission has catastrophically failed or if you just want a drop-in way to hold a bunch more power, Tier One's complete 6R140 transmissions are your winning ticket. Each one of these 6R140 transmissions is 100% complete and installs right into place of your F250 or F350's factory transmission with minimal hassles. Each of Tier One's built 6R140 transmissions includes both performance and reliability upgrades that allow you to push some extra power out of your tough Super Duty truck and tackle tough towing, off-road, and track applications without your transmission letting you down. Some of these 6R140 transmissions can handle over 1000 horsepower, allowing you to put together an immensely powerful F250 or F350 that will absolutely dominate at the drag strip or sled pull. Also check out our 6R140 rebuild kits or our 6R140 valve bodies!