Any scoring is unacceptable and must be machined out or replaced. The close-up on the right shows how clutch frictions are internally driven. Reliability comes from a firm shift instead of a soft shift, where slippage and friction burning occur. Check line pressure at idle, at 10 inches, and then at 3 inches of manifold vacuum to determine if any further adjustment needs to be made. The C4 is an automatic transmission that is mounted longitudinally. The drain-back valve keeps the torque converter full after shutdown. Performance Automatic tends to be at the center of the C4 universe because the company has done so much racing research and development in nearly four decades of racing experience.
It is one of the easiest automatic transmissions to rebuild and modify because it is so simple and there are a lot of seasoned racers and builders who know a lot about this transmission and how to get it to perform. The C4 was used on those trucks from 1965 until 1983. Expect some stubborn interference issues here. Check for a clean fit and lubricate with transmission fluid before installation. Tailshaft retention C-clip is already installed. There are other minor differences too numerous to mention. In first gear, the input shaft turns the forward planet, which reverses input shaft rotation to the sun gear.
For used parts like bellhousings, there are Ford specialty parts dealers around the country all too happy to help you. Written by George Reid and Republished with Permission of CarTech Inc. Diesels call for an extremely firm shift program for a more solid transfer of torque. The Dominator Extreme version of the C6 transmission is more powerful than the Stock or Dominator models as it has a torque rating of 600 nM and a horsepower rating of 650. At higher elevations, your engine may struggle to maintain 18 inches at idle. Some transmission professionals suggest deleting the wavy washer and adding a friction. Hindrances to control pressure can cause slippage, heat, and wear.
They just seem to keep going and going. Have professionals service your vehicle. There were two C4 shift patterns employed during its production life. Torque converters must always receive 1 to 2 quarts for a good pump prime and quick lubrication on start-up. The reverse-high clutch is linked to the input shell, which is connected to the sun gear. At this point, power is flowing through the front planet carrier to the output shaft for a gear reduction of 1.
Which one should you get when every year is faster? The transmission was produced in Livonia, Michigan for much of its production life, until being moved to Sharonville, Ohio in the 80s. Step-4: Install Thrust Washer This is the number-1 selective thrust washer, located at the front pump, which controls geartrain endplay. Another main case option available to you is the 1982—1986 C5, which is compatible with the C4 in terms of key components that interchange. Thanks much Fordfool wrote:Man, thank you for all of that information! It is easy to unknowingly damage seals and then be faced with leakage when the unit is in the car. And because the valve body is in two halves, expect to see different casting number years on each half, depending upon engineering changes. Another C4 issue to watch out for is transmission ventilation.
Step-4: Install Governor First lubricate the governor distributor sealing rings then slide the assembly onto the output shaft. The Dominator Extreme is the first of the three transmissions to use a hard input shaft. This transmission was also designed to handle significant loads in order to be able to be used in the large engine variants of the F-150. Im sure its inch pounds but I do not know what the exact torque it is. Some C4 and C5 applications have an O-ring instead of a gasket.
Step-3: Align Intermediate Band Intermediate band and both struts are in place. This spring returns the piston to rest when hydraulic pressure stops. Learn how to save some money by replacing your Corvette brake discs safely. At 3 inches of vacuum, expect to see 138 to 148 pounds of line pressure in any forward gear. I'll call you sat or sun scott and try and touch base with ya, sounds like you've got what i needIn that case, if it's the short shaft 4x4 with the short aluminum adapter, don't screw with taking it apart at all, just cram some rags into the back of the tailhousing, and take your handy abrasive cutoff saw, and whack about an inch off the shaft, dress it a bit, and call it a day.
The more friction surface you have going here, the better. External Assembly Step-1: Inspect Throttle Valve The throttle valve, which is actuated by the vacuumoperated throttle valve assembly vacuum modulator. The C4 transmission employs a conventional fluid coupling known as a torque converter. The transmission was very popular thanks to its strength and durability, being. Its torque rating is 800 nM and its horsepower rating is 1,000 rpm. Figure 7 includes all the torque values needed for your motor.
We have five clutch frictions as it is, which is satisfactory, and plenty for the street. However, what also matters a lot with the intermediate band is how wide the friction area is coupled with the type of friction material. On the other hand, over-torquing can stretch the bolt, causing it to damage the threading and possibly break. 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. There are six servo-apply-lever ratios to be aware of, and you must be very careful of which ones you use with corresponding servo covers and pistons. The only really bad news with C6 transmissions is internal drag due to dated thrust washer design, which promotes friction.
Note, I have torqued my 7. I used the rebuild book available from Summit sorry can't seem to find it there now. In the first year it was introduced, the C4 was offered in mostly cars, such as the Ford Fairlane and the Mercury Comet. The C servo you often hear about is for the 289 High Performance and is harder to find. And be very careful of the front and only pump.