Is a Cruise O Matic a C4?

By Anna Duncan

Have you ever heard the term “Cruise-O-Matic” and wondered what it means? Many car enthusiasts are familiar with the Ford C4 automatic transmission, but there is often confusion about whether the Cruise-O-Matic is the same thing. In this article, we’ll explore the differences between these two transmissions and help you understand what makes them unique.

What is a Ford C4 Transmission?

The Ford C4 transmission was first introduced in 1964 and was used in a variety of vehicles until its discontinuation in 1981. This three-speed automatic transmission was designed for small-block engines and was known for its reliability and durability. The C4 was also relatively lightweight, making it a popular choice for drag racing.

The Features of a C4 Transmission

  • Three-speed automatic
  • First gear ratio of 2.46:1
  • Second gear ratio of 1.46:1
  • Third gear ratio of 1:1 (direct drive)
  • No overdrive
  • Cast-iron case
  • Integrated bellhousing design

What is a Cruise-O-Matic Transmission?

The Cruise-O-Matic was also introduced in 1964 as an option for full-size Ford vehicles. It was later used in other models as well until its discontinuation in 1979. The Cruise-O-Matic is sometimes referred to as the MX or FMX, depending on the model year and specific features.

The Features of a Cruise-O-Matic Transmission

  • Three-speed automatic
  • Variety of gear ratios depending on model year and engine size
  • Some models had an overdrive gear
  • Cast-iron case with an aluminum tailshaft housing
  • Removable bellhousing design for easier engine swaps

Is a Cruise-O-Matic a C4?

The short answer is no, a Cruise-O-Matic is not a C4 transmission. While they share some similarities, such as both being three-speed automatics, they are distinct transmissions with different features and designs.

One of the main differences between the two transmissions is the bellhousing design. The C4 has an integrated bellhousing, which means the transmission and bellhousing are one piece. The Cruise-O-Matic has a removable bellhousing, which makes it easier to swap engines or replace the transmission.

Another difference is the material used for the tailshaft housing. The C4 has a cast-iron tailshaft housing, while the Cruise-O-Matic has an aluminum tailshaft housing. This makes the Cruise-O-Matic slightly lighter than the C4.

Finally, there are differences in gear ratios and overdrive options between the two transmissions. The Cruise-O-Matic was designed for larger vehicles and often had different gear ratios depending on engine size and model year. Some models even had an overdrive gear, which was not available on the C4.

In Conclusion

While it’s easy to confuse the Cruise-O-Matic with the C4 transmission, they are distinct designs with unique features. If you’re restoring or modifying a classic Ford vehicle, it’s important to know which transmission you have so you can source parts and make any necessary repairs. We hope this article has helped clarify some of the confusion around these two popular transmissions!