Instead of a low-reverse drum as in the C4, you instead have a low-reverse clutch package tied to the case, which performs the same function in a C6. In Drive, the C4 shifts the same as the Dual-Range at the large green dot with a normal 1-2-3 upshift program and the same gear ratios throughout. Torque is 12 to 20 ft-lbs. When line pressure is too high, shifts become harsh. And while I am on the subject of clutches, some transmission shops dress the steels for improved traction. These letter codes can be found cast into each apply lever. Torrington bearings reduce internal friction and free up power.
Step-10: Install Thrust Washers Numbers-3 and -4 thrusts are installed. Use great care, walking each seal carefully into place using a seal manipulation tool right. These valve bodies are machined to provide a perfect mating surface. Valve bodies between 6F35 Generation 1 and 2 are also different which indicates the two are not interchangeable. You could use a super-thin film of Form-Agasket non-hardening sealer on leakers but not everyone agrees with this approach.
Low-friction Torrington bearings reduce internal friction by a wide margin. C4 Gear Ratios First Gear 2. Written by George Reid and Republished with Permission of CarTech Inc. Covers transmission assembly, dis-assembly, diagnosis, troubleshooting, and electronic controls and operation. And then fill the pump cavity with assembly lube for a good start-up. The main regulator valve is next, which regulates control pressure. As you carefully separate the halves, take note of check ball and valve locations.
The graphics will open in a new window. We sell the total package, not something that will cost more in the long run or cost more after you buy everything you need one part at a time. Step-5: Install Wavy Washer After the pressure plate, install this wavy washer. This is an extremely rugged transmission as it came from Ford. This weak spot for C6 transmissions must be closely inspected. As with the C4, throttle valve adjustment on the C6 is key to proper operation and reliability. Alth-ough the C6 has a completely different case and internal components than the C4, it is virtually the same internally to the C4—on a larger scale for heavy-duty use.
Through the Gears As the reverse-high clutch direct clutch and input shell come into play, power begins to flow. Step-4: Insert Spring Retainer Secure the low-reverse clutch-piston spring retainer with a spring compressor and snap-ring. Instead, it used a redesigned valve body offering a P-R-N-D-2-1 shift pattern known as Select-Shift. Deburr the hole with a larger bit. Step-5: Remove Separator Plate Next remove the separator plate from the upper half of the valve body. Step-14: Remove Servo Accumulator Valvespring Next in line is the intermediate servo accumulator valve. And when you punch the accelerator, you want a quick and positive downshift that delivers rapid acceleration without delay.
This is a critical safety item; so pay very close attention to detail here. The low-reverse clutch and hub, one-way roller clutch, and the output shaft are visible. Step-7: Install Parking Gear Closely inspect parking gear teeth for any damage or potential failure points. The forward planet carrier is tied to the output shaft via the sun gear. Hold the adjustment stud and tighten the locknut 35 to 40 ft-lbs. Written by George Reid and Republished with Permission of CarTech Inc.
Note: There have been many engineering changes in this transmission since its introduction. Seals One of the most important elements of a transmission build is proper seal use and installation. Step-10: Assemble Valve Body Two valve body halves go back together. I cannot overstress the importance of checking clutch clearances followed by an air-check on each. Step-4: Install Intermediate Servo Apply Lever C6 transmissions are fitted with a number of different intermediate- band servo apply levers. Step-9: Install Output Shaft Lubricate and install the output shaft, making sure it is firmly seated in the case. The C4 employed a new state-of-the-art Simpson compound planetary gear set, which became an industry standard in the years to follow.
Step-2: Install Rings Front pump sealing rings are gapless. This manual will show the disassembly and assembly of both the Generation 1 and 2 transmissions as well as component differences and transmission specifications. The C4 Ford took what it learned from the 2-speed BorgWarner automatic and applied it to the C4 3-speed Cruise-O-Matic that arrived for the 1964 model year. The A lever left has a 1. If you must use a steel pan, find one with perfect rails and use a thick, highquality gasket.
This involves working the forward clutch back and forth until it completely seats in the reverse-high clutch drum. The pan-fill C4 really is more about strength for heavy-duty applications like full-size cars and trucks than anything else because the bellhousing bolts to the case outside the pump housing. The wider you can spec your band width, the better. In this case we are going to install a shift correction kit along with all the necessary parts to rebuild it. This one gets five clutches. The C6 was used in trucks and cars with larger engines. It is important for the rebuild technician to pay close attention to parts differences between Generation 1 and 2.