ZF sold the manufacturing rights to the 5DS 25 Series transaxles to RBT Transmissions, who has developed the proprietary RBT-6 speed transaxle.
The history of RBT Transmissions follows the dynamic career of Roy Butfoy, who was a member of Ford's GT racing team at LeMans. Roy was later instrumental in setting up Ford's ZF re-manufacturer program during the time Lincoln-Mercury imported the Pantera. After he passed away in 2000, his son Lloyd Butfoy left the CART/Indycar series after 12 years as a Gearbox Technician to run RBT Transmissions.
RBT Transmissions can re-build your ZF transaxle according to your needs, from stock to applications with high output racing engines.