Section 6: E4OD Transmissions
E4OD Transmissions Rebuilt here with Free Shipping, Ford E4OD Specialist, Truck E4OD transmissions with heavy duty parts, Monster E4OD Transmission, Eat My Shift 0 800-708-0087. The E4OD transmission was introduced in 1989 and was based on the core components from the hugely popular Ford C6 transmission, which had started to feature an overdrive gearset and electronic shift controls. The advantages to these updates were numerous.
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:
- 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.
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E4od Transmission Fluid
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:
- 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.