The Ford C4 Transmission: A Legacy of Reliability and Performance
The Ford C4 transmission, introduced in 1964 as a replacement for the Ford-O-Matic two-speed, represents one of the most significant developments in automatic transmission history. This three-speed automatic transmission was designed to be lighter and more compact than its predecessor, making it an ideal match for Ford's smaller displacement engines, particularly the inline-six and small V8 applications.
Built for Efficiency and Durability:
The C4's lightweight aluminum case and simple internal design made it approximately 50 pounds lighter than the cast-iron Ford-O-Matic. This weight reduction not only improved vehicle performance but also enhanced fuel efficiency. The transmission features a Simpson planetary gearset, which provides three forward gears and one reverse gear, operated through a straightforward hydraulic control system.
Power Handling Capabilities:
In its stock form, the C4 can reliably handle around 300-450 horsepower, depending on the build year and specific application. Early models (1964-1969) typically have lower power handling capabilities due to their smaller input shaft (26 spline), while later models (1970 and up) feature a stronger 26/31 spline input shaft. The transmission's limitation primarily lies in its relatively small input shaft and servo sizes.
Common Applications:
Originally installed in vehicles such as:
• Ford Mustang (1964-1982)
• Ford Fairlane
• Mercury Comet
• Various Ford trucks and vans
• Numerous other Ford vehicles with small block V8s and six-cylinder engines
Performance Modifications:
At Bench Built Transmissions, we frequently upgrade C4s with:
• Hardened input shafts
• Enhanced clutch packs
• Heavy-duty servo assemblies
• Modified valve bodies for improved shift characteristics
• Upgraded bands and sprags
C4 Automatic Transmission (Rebuild)
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Carry Out C4 (No Torque Converter) $1,850 Starting Price
Our 12-month/12,000-mile limited warranty for the C4 transmission covers internal soft parts including friction clutch packs, sealing rings, gaskets, seals, band material, bushings, thrust washers, and filter. The warranty specifically excludes the case, valve body, pump housing, planetary carriers, sun shell, output shaft, input shaft, and torque converter. Our warranty does not cover labor, fluids, removal/installation costs, towing expenses, or rental vehicles.
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Carry out C4 with reman torque converter (stock oem) $2,150 Starting Price
12-month/12,000-mile limited warranty for the C4 transmission and torque converter package covers internal soft parts including friction clutch packs, sealing rings, gaskets, seals, band material, bushings, thrust washers, filter, and torque converter internals. The warranty specifically excludes the case, valve body, pump housing, planetary carriers, sun shell, output shaft, input shaft, and converter housing.
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Turn Key C4 Automatic Transmission Rebuild $2,650 Starting Price
Our premium 24-month/24,000-mile extended warranty for Turn-Key C4 transmission service includes comprehensive coverage of internal soft parts: friction clutch packs, sealing rings, gaskets, seals, band material, bushings, thrust washers, filter, and torque converter internals. The warranty specifically excludes the case, valve body, pump housing, planetary carriers, sun shell, output shaft, input shaft, and converter housing. This enhanced warranty includes installation labor but does not cover fluids, towing expenses, or rental vehicles.
Subtract $300.00 If Supply Performance Converter