How to Reset Eaton Fuller Automatic Transmission

1. To reset an Eaton Fuller Automatic Transmission, first make sure the vehicle is parked on level ground and that the parking brake is engaged. 2. Put the transmission in neutral and turn off all electrical power to the transmission for at least a minute. 3. Turn on the ignition switch but do not start the engine yet, then move shift selector through all gears including reverse several times quickly before returning it back to neutral again.

4. Now start up your engine while keeping your foot firmly on the service brakes and wait until you hear two audible clicks (indicating that fuel valve has been activated) then release your foot from service brakes slowly after hearing these two clicks indicating that shifter calibration has been completed successfully . 5. Lastly turn off ignition switch for few seconds and restart it making sure no trouble codes appear when you get it into drive mode or any other gear position; if everything checks out ok then resetting process of Eaton Fuller Automatic Transmission has been done successfully!

  • Step 1: Park the truck on a flat surface and turn off the engine
  • Apply the parking brake for additional safety
  • Locate the transmission dipstick and remove it from its holder
  • Step 2: Use an oil extraction pump to remove all of the fluid from the transmission, making sure not to spill any on your clothes or skin as it is toxic when ingested or touched
  • Replace this with new ATF-approved Eaton Fuller automatic transmission fluid; refer to your owner’s manual for correct type and quantity requirements
  • Step 3: Withdraw a pin that is found inside of each shift lever assembly at every gear station, including reverse, neutral and drive positions (six total)
  • This will reset all of your gears back to their factory settings and allow you to start fresh in terms of shifting patterns
  • Once these pins have been withdrawn they should be disposed so they cannot enter into other transmissions accidentally
  • Step 4: Put all six shift levers in either park or neutral position before turning on ignition switch so that no unexpected movement occurs while resetting process takes place; some vehicles may require disconnection of battery terminals as well if there are electronic components involved in gear operation such as speed sensors etcetera, consult user guide/service manual prior attempting anything else further than what has already been explained hereinabove! Step 5: Reinsert drain plug after ensuring filter elements were cleaned properly during draining operation earlier—fill up tank using appropriate amount & quality grade ATF which was specified by manufacturer according instruction provided within aforesaid reference book(s); use funnel if needed help ensure proper pouring without making mess out around vehicle’s vicinity like spilling onto ground below…

How to Reset Grease Interval in an Eaton Ultrashift Plus transmission

What is the Code 25 on the Eaton Autoshift?

The code 25 on the Eaton autoshift is a diagnostic code that indicates an issue with the transmission range sensor. This sensor is responsible for sending information to the engine control unit (ECU) about what gear the vehicle should be in at any given time. If this sensor fails, it can cause a variety of problems including inconsistent shifting and trouble codes such as code 25.

To diagnose this problem correctly, one must first read any other trouble codes stored in the ECU or scan tool to identify which components are failing before replacing anything related to the transmission range sensor itself. Once all other possible causes have been eliminated, then it would be safe to replace or repair the faulty part or parts associated with code 25 on an Eaton autoshift system.

What is the Code 22 on the Eaton Automatic Transmission?

Code 22 on the Eaton automatic transmission is an indication of a problem with the transmission’s shift solenoid. It can be caused by a few different issues, such as low line pressure in the transmission due to failure of one or more components, and/or contamination in the fluid that controls shift timing. When this code appears, it is important to have a certified technician inspect your vehicle’s electrical system and perform any necessary repairs.

If not corrected promptly, Code 22 could cause serious damage to your vehicle’s automatic transmission system resulting in decreased performance and even total failure. To ensure proper operation of your vehicle’s automatic transmission, always make sure to follow regular maintenance schedules for all essential components including periodic oil changes and filter replacements. Additionally, if you experience any problems when changing gears or notice any unexplained noises coming from under the hood while driving then have your car inspected immediately before further damage occurs.

What is Code 88 on Eaton Automatic Transmission?

Code 88 on Eaton automatic transmissions is an indication that the transmission has reached its maximum temperature. This code can be triggered by a variety of conditions, such as overloading, excessive engine revs and towing heavy loads. It is important to note that although this code is not necessarily indicative of a major issue with your transmission, it should still be addressed promptly in order to prevent further damage or even catastrophic failure.

In most cases, the solution will involve simply allowing the transmission to cool down for an extended period before restarting it again. If cooling alone does not resolve the problem then other measures may need to be taken; which could include replacing parts such as seals or gaskets or performing more extensive repairs if needed. Ultimately, addressing Code 88 early on can save you from costly repairs in the future and keep your Eaton automatic transmission running smoothly for years to come.

What is Code 14 on Eaton Automatic Transmission?

Code 14 on Eaton automatic transmission is an error code that indicates a problem with the clutch pressure control solenoid. The clutch pressure control solenoid is responsible for controlling the amount of oil pressure within the torque converter, which in turn affects how quickly or slowly the vehicle shifts gears. When Code 14 appears, it usually means that there’s a restriction in the line leading to this solenoid, indicating either a blocked passage or faulty wiring.

If left unchecked, this can cause further damage to your transmission and lead to costly repairs down the road. To fix this issue, you’ll need to check all lines leading up to and connected to the clutch pressure control solenoid for any blockage or signs of wear and tear. In some cases, replacing either part may be necessary in order for your vehicle’s transmission system to work correctly again.

How to Reset Eaton Fuller Automatic Transmission


Eaton Fuller Automatic Transmission Service Light Flashing

If your Eaton Fuller Automatic Transmission Service Light is flashing, it’s important to have your truck inspected by a qualified mechanic as soon as possible. In many cases, the service light will indicate a minor issue that can be easily fixed; however, in some instances, the transmission may need more extensive repairs or even replacement. It’s best to take care of any necessary repairs sooner rather than later so that you don’t end up with bigger problems down the road.

Eaton Fuller Automatic Transmission Problems

Eaton Fuller Automatic Transmissions are widely used in heavy duty trucks and buses, but they can be prone to occasional problems. Common issues include difficulty shifting gears, a slipping clutch, and transmission fluid leaks. If any of these problems arise it is important to get the issue repaired quickly by a qualified mechanic in order to prevent further damage.

Eaton Fuller Automatic Transmission Won’T Go into Gear

If you find that your Eaton Fuller Automatic Transmission won’t go into gear, there are several potential causes. It could be due to a faulty shift selector switch, low transmission fluid levels, or worn out clutches and bands. If the issue persists after topping up your transmission fluid, it is recommended you take your vehicle to an experienced mechanic for diagnosis and repair.


In conclusion, resetting an Eaton Fuller Automatic Transmission is a simple process that can be done by anyone. The steps outlined in this blog post are straightforward and easy to follow. With the correct tools and a bit of patience, you can have your transmission up and running again in no time.

If you need help or have questions about the procedure, it is always best to seek professional advice from an automotive technician who specializes in these transmissions.


  • Alex Gearhart

    Alex Gearhart, an automotive expert specializing in transmissions, has over a decade of hands-on industry experience. With extensive knowledge in manual and automatic systems, Alex is passionate about educating car enthusiasts on vehicle maintenance. As the chief author at, Alex simplifies complex concepts for readers, helping them make informed decisions about their vehicles. Outside of work, Alex enjoys road trips, restoring classic cars, and exploring new automotive technologies.

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