E40d

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Electronically Controlled
4 Forward Gears
OD = Over Drive

Curt shows the differences between the E4OD and the 4R100 monster transmissions. The earlier generation was produced from 1990 to 1997 was considered an E4OD. The E40D was Ford's first electronically controlled automatic in light trucks. According to 'Popular Mechanics,' the E40D receives commands from the EEC-IV on-board engine control computer, 'which processes input from engine, transmission and the vehicle itself to determine the best shift points for performance and consistent shift feel.' E40D 4R100 Transmission Shift Kit Transgo SK E4OD. Reduces, corrects or prevents soft shifts, torque converter burnup, reverse delay, torque converter slip-shudder, no reverse when hot, 2nd and 3rd burnup and pump buzz. Comes with complete, easy to follow instructions. This shift kit designed for installation installed during transmission rebuild.

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.


E40d rebuild kit

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.

Torque

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.


E4OD / 4R100 Specs

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

Gear Ratios:

E40d Troubleshooting

  • 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.


E40d valve body

Early E4OD Range Sensors are Prone to Failure

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.

Section 6: E4OD Transmissions

Tips for Lightning and Other Truck Owners

The E4OD four speed automatic transmission is used in F and E seriestrucks, as well as AOD and AOD-E/4R70W four speed automatic transmissions.To determine which is used in your vehicle, follow these guidelines:

E40d Vs 4r100

  • If the shifter has a P-R-N-OD-D-1 pattern, the transmission must be anAOD (applicable to 1980-1993 vehicles).
  • If a 1989-1993 truck has an Overdrive Cancel Switch and a P-R-N-OD-2-1shifter pattern, then it is equipped with an E4OD transmission. With thepossible exception of some 4R70W equipped 1993 E-150 vans with 5.0L SFIengines (The existence of a 1993 4R70W van is unsubstantiated).
  • 1994 and later vehicles with four speed automatic transmissions will allhave an Overdrive Cancel Switch and a P-R-N-OD-2-1 shifter pattern, butmay have either an E4OD or a 4R70W transmission. All 4.2L, 4.6L, and some5.0L engines use the 4R70W transmission, while diesel, 4.9L, 5.4L, 5.8L,6.8L, and 7.5L vehicles always use E4OD's. You can measure the transmissionfluid pan to determine which transmission you have if identification informationis not available. A 4R70W transmission pan has an overall length of justunder 15 inches, while an E4OD pan is much larger, measuring about 20 inchesin overall length.

The E4OD has seen many changes and updates since its introduction in 1989,but most later transmissions will prove reliable with nothing more thanour ReCal-Pro E4OD valve body recalibration kit and a 'low pressure drop'auxiliary oil cooler (an OEM auxiliary cooler, if installed, is usuallyadequate). Baumann Electronic Controls supports the E4OD with the US Shift electronic transmission control system (which provides completecontrol of all transmission shift points as well as torque converter clutchoperation and part-throttle shift firmness). We can alsoprovide custom-built torque converters for the E4OD transmission as mentionedin the 'Torque Converter Upgrades' section ofthis guide.

If it becomes necessary to overhaul your E4OD transmission, you shouldperform as many updates as possible if it is a pre-1995 unit. E4OD componentupdates include, as an example, the following items:

E40d Transmission For Sale

  • Improved (thicker) converter clutch piston (circa 1994), prevents the formationof cracks which relieve fluid pressure from the apply side of the clutch,causing it to slip and even bluing the outside surface of the torque converterin extreme cases. Ensure that your new converter contains an updated OEMor 'LuK' brand heavy-duty clutch. This can be difficult, as many torqueconverter suppliers and remanufacturers may not use this new style of clutch.
  • Higher displacement front pump (for 1995) provides more fluid capacityfor faster engagement of reverse and greater lube flow.
  • New (for 1994) 4-pinion overdrive planet and input shaft assemblies replaceolder 3 and 4 pinion units which tend to develop cracks in the carrierunder heavy loads.
  • Center support update kit (for units built from 1989 through part of 1994)replaces wear-prone bushing with a ball bearing and contains a new overdrivestub shaft.
  • Stronger overdrive clutch cylinder snap ring which will not dislodge.
  • Revised sun gear and rear case bushings (circa 1992 model year) providelonger wear life and better lubrication.
  • 4 pinion planet carriers (first used in 1992 model year)
  • New forward clutch friction plates with hardened internal splines cure'chatter' and 'no-drive' conditions in E4OD and some later C-6 transmissions.