Complete 4R100 Built Transmissions

The 4R100 transmission is known for being fairly reliable, but it doesn't tend to handle more power that effectively, and a lot of 4R100s have been out on the road and doing work for a VERY long time now. Whether your Super Duty's 4R100 has seen better days or if you're adding a whole ton of power to your aggressive 7.3L Powerstroke build, we here at Tier One have a nice selection of built 4R100 transmissions that will give your truck a total transmission refresh and the ability to handle a ton more power and heavy towing applications all in one place. Tier One's performance 4R100 transmissions come with a ton of upgrades that both improve reliability over the stock 4R100s, as well as power-holding improvements that let you use aggressive tuning, big turbos, fuel system upgrades, and just about anything else you have in mind. Make sure you also check out our 4R100 Transmission Rebuild Kits or our 4R100 Transmission Coolers!