Modulators
Rostra Precision Controls has been manufacturing original equipment vacuum modulators since the early 1950s. What began as Skoville Manufacturing, then Century Brass, and now Rostra (purchased Allomatic production in 1982,) is now one of the few companies in the world still producing a broad range of this sometimes forgotten technology.
We proudly offer over 30 part numbers for all of the “popular” Ford, GM and Jatco produced vacuum controlled transmissions. We have consolidated as many original equipment part numbers as possible to keep your inventory levels low and to further simplify the ordering process. We have also made many applications adjustable to help you fine tune and put the finishing touches on your rebuild.
All of our modulators are produced with pride in our North Carolina facility.
See our current list of modulators.
Rostra Precision Controls is capable of designing and manufacturing many different types of modulators. If you have a specialized need or a recommendation for a new product, please contact us at the link below to discuss tour need with one of our sales engineers. We appreciate and welcome all new opportunities.