Ford c4 transmission identification

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Literally millions of Ford cars and trucks were equipped with C4 and C6 automatic transmissions between the introduction of the C4 in and the replacement of the C6 in the s. These purely mechanical no electronic controls automatic transmissions are still popular with racers, hot rodders, and restorers today due to their simplicity and low cost. Cores can be purchased and rebuilt to suit the needs of a specific vehicle for much less than a comparably rebuilt modern overdrive automatic transmission with electronic controls. But, they lack the overdriven gears and lockup torque converters the newer transmissions rely upon to boost fuel economy figures. Ford had a fundamental challenge to its direction and future in the late s—how to shed a stodgy image and dated technology.

Ford c4 transmission identification

This article should give you a better grasp on the different types and uses of C4 transmissions. C4's were produced and used in production cars and trucks from to , when they were replaced by the three speed automatic transmission with lockup torque converter known as the C5. In this timeframe there were several versions, each with significant differences that, depending on your application, might make one better for you. From through , the C4's made had a 24 spline input shaft and front hub assembly, and with the lower spline count came a slightly smaller diameter on the input shaft. This year range is still desirable, as its case is identical to the case fill C4 transmissions, so the old 24 spine parts can be upgraded to 26 spline. However, the valve bodies in the transmissions are different. The valve bodies fall into 4 different groups. Keep this in mind when selecting a C4, since the valve bodies cannot be interchanged between year ranges a valve body wouldn't work on a C4. Bell housings came in both small and tooth large bell housing sizes, with matching flex plate sizes. In , the C4 got an upgrade.

Then some had 5 clutch forward drums, some were 4.

Log in. Sign up. JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding. Since our previous restorations have all been 4 speeds we don't have much experience in this particular item. The transmission in the car is marked C6DPA.

The C4 is a transmission that was produced by the Ford Motor Company starting in It was engineered to work with rear-wheel drive vehicles. The transmission stayed relatively the same for its first 5 years of production. In the engineers at Ford gave it its first design changes. These changes gave the C4 upgraded internals capable of handling more power and increased its durability. The C4 was used in light duty vehicles such as the Mustang, Torino, and Falcon. It also was used in the F until production ceased. It still is a pretty popular transmission with bracket racers due to its pound weight.

Ford c4 transmission identification

Seeing as we don't know a heck of a lot about Ford automatics, we abducted a variety of transmission experts and interrogated them for the following information. We found that like GM, Ford also made a number of trannies capable of fulfilling the needs of the weekend warrior, class racer, heavy hauler, and Sunday driver. Follow along as we take an in-depth look at the two-speeds, three-speeds, and the overdrive units. Ford offered a "Fordomatic" two-speed between and in six-cylinder applications exclusively mainly in Falcons, Comets, and so on. They are easily identified by their one-piece aluminum case. Unlike GM's Powerglide, they offer no performance advantages, so forget 'em. Ford's various three-speed automatic transmissions came in a number of applications and a variety of types. The lightest duty of the three-speed automatic transmissions, the C3, and the oddball "Cruise-O-Matic" series probably won't be of any interest to many car crafters. From a V-8 performance standpoint, there are really only two transmissions to consider - the C4 and the C6. Introduced in , the C4 was Ford's first light-duty three-speed automatic transmission.

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The transmission in the car is marked C6DPA. This is when Ford engineers developed lightweight aluminum-case automatic transmissions for an exciting lineup of automobiles that arrived in the s. Generally tooth flex-plates have a If the car was previously a T5 car with long-tubes, or if long-tubes will be added in the future, a tooth bell housing would be preferable because there will be much less problems with header clearance as compared to a tooth bell housing. Please consider creating a new thread. Sporting a tooth bell housing and flex-plate, and a differently designed bell housing and transmission case, it was put mainly into trucks during its usage. Ford had a fundamental challenge to its direction and future in the late s—how to shed a stodgy image and dated technology. These purely mechanical no electronic controls automatic transmissions are still popular with racers, hot rodders, and restorers today due to their simplicity and low cost. This valve body was used from to Insert Quotes Quotes Post Reply. This is an older thread, you may not receive a response, and could be reviving an old thread. On the foundry stamps alpha digit denotes decade ie. C4's were produced and used in production cars and trucks from to , when they were replaced by the three speed automatic transmission with lockup torque converter known as the C5. For example: D7SP would mean that the transmission is a model. Several companies sell flex-plates, some in SFI versions, if you cannot find the stock equivalent of what you need.

The Ford C4 automatic transmission, manufactured between and , is easily identified by sight, measurement and Ford part numbers. It is a two-speed automatic, used extensively in both passenger cars and trucks.

Log in. Expect to see all kinds of mismatched transmissions. Case and valve-body bolt patterns changed for —, which is why a — valve body does not fit a — case. In , Ford gave the C4 a larger input shaft and clutch hub measuring. This is an older thread, you may not receive a response, and could be reviving an old thread. It has 2 sets of bolts in the bell housing, 7 for the front pump and another 5 to attach the bell housing. There were C4 transmissions with pan-fill dipstick tubes blended case and bellhousing with tooth flexplates. Are there any differences between a 66 and 68 C4 Tranny? However, C5 cases and many internal components are similar or identical to the C4, and are quite suitable for performance applications thanks to their improvements, as discussed in Chapter 4. Explore Our Forums. These are right above that DODP number.