Hi guys, My buddy's and I installed my C6 yesterday. Street and weekend-racing C4s can easily handle 250 to 600 hp without breaking a sweat. Spline the forward clutch hub and ring gear into clutch frictions by gently working the ring gear back and forth until fully seated. Because used C servos are hard to find, go with the larger-capacity H servo. The C4 employed a new state-of-the-art Simpson compound planetary gear set, which became an industry standard in the years to follow. Reverse-high clutch return springs do differ in old-versus-newer C4 units. Note: Deep Pan Required with all Transbrake Valve Bodies.
Did you remember to install the gasket? Now I'm sure you're wondering how to find the C4 that you want. Besides which it will not bolt up behind a V8 different bolt pattern. This may vary considerably in the aftermarket. Step-9: Install Reverse-High Snap Ring Special Tool Use a spring compressor to install a reverse-high clutch-piston snap-ring. Ford called its C4 the Cruise- O-Matic while Mercury called its C4 the Merc-O-Matic. Check line pressure at idle, then, at 10 and 3 inches of manifold vacuum to determine if any further adjustment needs to be made.
You have to change your shifter to a P-R-N-D-2-1 with the change to a 1967—1969 valve body. The input shaft and front hub were strengthened by enlarging them to 26 spline, increasing the input shaft diameter, but also making its torque-converter and input shaft non-interchangeable with the older 24 spline 64-69 C4's. Step-13: Install Reverse Planet Carrier Fit the reverse planet carrier into the reverse ring gear already installed in the case. They also offer the quickest release time, which is important to crisp performance. Step-6: Adjust the Bands Professional Mechanic Tip Tighten in this sequence: intermediate band to 10 ft-lbs torque and then back off 1½ turns. Prior to assembly, closely re-inspect all parts for unusual wear patterns or damage. If you start out in second gear with this 1967-on pattern, there is no upshift out of second, which makes the 1967-on Select-Shift shift function differently than the earlier 1964—1966 Green Dot, which does upshift.
When vacuum exceeds spring pressure, you reduce control pressure. Tighten all pan bolts first first stage , then tighten again to final spec second … stage. Im sure its inch pounds but I do not know what the exact torque it is. Beginning in 1967, Ford dropped the Dual-Range shift pattern for this traditional P-R-N-D-2-1 pattern and used a new name—Select-Shift. This valve body was used from 1967 to 1969. You get what you pay for.
Step-17: Torque Bolts Torque Fasteners Use a high-temperature thread locker on pump bolt threads for added security. Step-19: Replace Low-Reverse Servo Piston The low-reverse servo piston should always be replaced. C4 Operation In order to best understand how to build a C4, you must first know how it operates. 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. The casting number is derived from the actual casting or part, and typically does not match the part, engineering, or service numbers. Later versions had a transmission fluid cooler in the radiator.
There are no gaskets or seals here, just a snug interference fit. On the street, you want longevity. A C6 is easily identified by its one-piece bellhousing and main case design. Locknuts to 35 to 45 ft-lbs. Tailshaft length and housing are important considerations. Valve Body Kits Performance Automatic has researched the best shift modification packages in the business and brought together the best there is.
Secondary valve determines shift points based on vehicle speed. The reverse planet pinion gears drive the reverse ring gear in the opposite direction. The main thing you want to pay attention to is cover and piston size along with Ford part number. When installing the valve body, carefully guide manual shift and kickdown linkages into proper positions. In early applications, the Ford-O-Matic transferred heat to the atmosphere via the torque converter and cooling vents in the bellhousing, instead of using fluid as coolant and a transmission cooler in the radiator.
The blended-bell case is known as a pan-fill because the dipstick tube goes into the pan instead of the case. Proper fitment boils down to feel—first the input shaft, and then the pump flats. Although this was known as a very durable and robust transmission, everything has problems. If there is something that is particularly unreadable, drop me a note and I will try to rescan the item. The sun gear is driven by the input shell, which drives the reverse planet gears.
Hope that this may provide someone with some useful information. This means both stator support and forward clutch contact surfaces. This is when Ford engineers developed lightweight a l u m i n u m — c a s e automatic transmissions for an exciting lineup of automobiles that arrived in the 1960s. Confusion abounds when mass rebuilders get pieces mixed up. You want the best friction materials possible.