026742PL - Ford C6/E4OD/4R100 Transmission Alto Red Eagle High Performance Direct Friction.075' 63 Tooth 6.362' OD L67-On: 026701K: 026701K - Ford C6/E4OD/4R100 Transmission Kolene Coated High Performance Forward & Direct Steel.078' 26 Tooth 5.121' OD L67-On: 026703K. A Used 4R100 Transmission Used 4R100 transmissions are no doubt an enticing option because of they’re affordability. However, locating the exact match to your vehicle can be difficult and sourcing a properly functioning used 4R100 Transmission may take several installation & removal attempts before getting a good one.

A transmission cooler is a good buy, as it can help regulate your transmission’s temperature, thereby helping it operate at maximum efficiency while giving longevity to the part. Ultimately, fixing your 4R100 transmission comes down to inspecting your components.

A vehicle is made with numerous software and hardware components. Amongst them, the gear box or transmission plays an essential part in the function of the car, just like the brain and heart in our body. Without a transmission, the engine would not be able to deliver power to the wheels.

In general, there are 2 types of transmission: automatic and manual. The manual device is managed by the user and have a gear selector as well as clutch assembly to adjust levels of gear.

Therefore, you can control the selected gear completely. These days, most car models it made with an automatic system of transmission, which applies a torque converter instead of clutches to change gears automatically without manual effort.

4R100 is a heavy-duty automatic transmission that is introduced in 1998 by Ford. In fact, it is an updated version of the predecessor E4OD. This system is an essential part in several of the most popular Ford cars such as Ford Excursion, Ford Expedition, Ford Super Duty, Ford Lightning and Ford E-series.

When you expose a 4R100 transmission to increased torque load and overload, its operation would be weakened. In this article, we will show you some common problems in 4R100 transmission and also several according solutions that you can do yourself without the need to call a professional mechanic.

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Problems in 4R100 Transmission​

The first thing you need to do is finding out what is wrong with the 4R100 transmission to have suitable solution. The following are some common issues happening in the 4R100:

• Slipping the transmission off when shifting gears.
• Fluid leakage from the front part of the transmission.
• Hard shift in the gears.
• Car stalls in reverse.
• Transmission only works in reverse.

Solutions for 4R100 Transmission Issues

If you have any problems with the 4R100 transmission mentioned above, then the following solutions would help to deal with them:

1. Transmission Slipping When Shifting Gear

When the gears are not shifted properly by the transmission, do the belowing steps.

4r100 Transmission Specs

• Check the alignment of DTR sensor to see whether it slips, it would be a cause for the delay in transmission response in your vehicle.
• Check the overdrive light to see if it flashes. In this situation, the problem would be from the transmission’s solenoid. This is a serious problem and requires rebuilding, which could save you a lot of money. However, this task requires specialized skills, so you should have it done by a professional mechanic.

2. Fluid Leakage from The Transmission

When you face a fluid leakage in the transmission, it is important to check the following parts:

• • Front seal: If you have not used the car for a long time, then the seal would possibly dry up and get brittle. As a result, the seal would lose its elasticity and ability to keep the liquid, which leads to the leakage.

• Hub of the torque converter: This component would worn out due to constant use of your car, which requires replacement of the transmission or the torque converter.

In both cases, you need to replace the transmission with an already used one, which would be found with cheaper price.

3. HardShift in The Gears

If you are dealing with a hard shift in the gears, then the accumulator would be broken or stuck in the bone. In this case, you should remove it carefully from the transmission, and see if there is any marks of wear at the bore.

Use a dry and soft cloth to clean it, then check whether the grooves in the accumulator are damaged or not clogged.

Another possible cause would be because of a faulty line modulator valve. You would see it show up at other gears if the problem happens. To fix this, you need to replace with a new one.​

4. Vehicle Stalls While Reversing

This issue would be the result of malfunction in IAC or Idle Air Control sensor, which is often built in modern vehicle models to control the idling RPM of the engine.

This device could last for lifetime of your car, thus the premature failure is probably due to complete or partial jamming in the actuator, which could not control smoothly and lead to frequent stall of the engine.

In most situations, you can resolve this problem by removing and cleaning the IAC sensor. But if this does not work, then you need to replace the actuator or the IAC sensor.​

5. Transmission Only Works in Reverse

When facing this problem, you should examine the forward clutch assembly to see if it is worn out. In addition, remember to check the splines in the forward planetary. Both cases require to replace the transmission.

A re-manufactured or rebuilt transmission has all required upgrades and necessary major alterations, which are made to improve its durability and performance.

​If you buy a 4R100 transmission that is re-manufactured from a famous brand, then you can have a warranty of nearly 3 years instead of a 90 days. The company also provides complete replacement of the transmission when it fails to work normally during this warranty period.

Conclusion​

After reading this article, we believe that you have learned all necessary information to deal with common problems in 4R100 transmission.

Once you have mastered in rebuilding the transmission, it becomes much easier to add the features as an improvement, which eventually enhances its performance. In addition, you can also increase the efficiency by installing a transmission cooler to regulate the temperature in the transmission.

To get maximum performance from the 4R100 transmission, you need to manually check its components and operation frequently. Figuring out any problems early could help to solve it timely, which does not seriously affect the performance of the car.​

4r100 Transmission Diagram And Description

Related Article: What Should You Do After Adding Too Much Transmission Fluid?

4r100 Transmission Fluid Type

Electronically Controlled
4 Forward Gears
OD = Over Drive

Introduced in 1989, the E4OD was Ford's first electronically controlled transmission. Based on core components of the C6, this transmission was used in many light and heavy duty vehicles including the Bronco, F-150, F-250, and F-350. While physically too large for use in most passenger cars, these transmissions are popular upgrades for older trucks and larger vehicles that were originally equipped with a 3 speed automatic. With the addition of an overdrive, increased fuel economy and a better driving experience can be had by choosing one of these units for your project. This transmission is also very robust, with power and torque handling capabilities (especially when upgraded) that make it a popular choice for diesel enthusiasts. The E4OD was produced in several different bolt patterns, which also makes it popular for a swap or upgrade. These include small block, big block (385 series, not FE), diesel, and modular bolt patterns.

Important Years

• 1989 - 1997 was the E4OD production run
• 1997 was the transition year to the 4R100 and vehicles from this year could be found with either transmission.

The 4R100 was introduced as the replacement for the E4OD and was internally stronger for use in the Powerstroke Diesel trucks. While almost identical on the exterior, not all parts are interchangeable between these two units, so care must be exercised to insure compatibility. Unlike the E4OD, these units have a dedicated output shaft speed sensor located towards the rear of the transmission. A PWM (pulse-width modulated) torque converter clutch solenoid was also added, first to 4R100s in diesel applications and later to all 4R100s.

Ford 4r100 Performance Transmissions

E4OD / 4R100 Specs

• Weight: 270 lbs. (dry with converter)
• Case: Aluminum
• Fluid Capacity: 18 quarts Mercon V (total with torque converter)

Gear Ratios:

• 1st: 2.71
• 2nd: 1.54
• 3rd: 1.00
• 4th: 0.71

Not all E4OD transmissions come with the gear machined into the output shaft to drive a cable-drive speedometer. In 1992, Ford started using the differential speed sensor to run the electronic speedometer in trucks and omitted the drive gear from the output shaft. Transmissions without the gear can have the output shaft changed, but complete transmission disassembly is required since the output shaft is in the back and the transmission disassembles from the front.

Early E4OD Range Sensors are Prone to Failure

4r100 Transmission Problems

E4OD transmissions manufactured prior to 1995 had an issue with the MLPS, or “Range Sensor”. It was determined to be inadequately weather-proof, allowing water to enter the connector and corrode the pins, causing electrical problems. It is always recommended that this sensor be replaced with an updated 1995 or newer style, if it has not been already.