Common Customer Problems With The Ford E4OD Transmission
Posted by Regis on Friday, January 4th, 2013
The Ford E4OD is a four speed automatic transmission designed for rear wheel drive light and medium duty pickup trucks. The transmission is based heavily off the Ford C6 transmission which was a heavy duty three speed automatic. The E4OD is Ford’s first electronically controlled transmission. It was first introduced in the full size Bronco’s, and remained in product in the Ford E-series, F-series and Expedition through the 1998 model year. The E4OD was eventually replaced by the 4R100 transmission.
Here are a few problems your E4OD trans equipped customer may experience:
The transmission will only go into reverse, but nothing in the other gears. I would check the forward clutch assemble first. The clutches might be worn out. You may have also stripped the splines from your forward planetary. Either problem is going to require that the transmission be replaced.
No Reverse. MLPS (Manual Lever Position Sensor) is possibly the problem. This problem could also be caused by the TRS (Transmission Range Sensor). I would first remove both of them and clean them up with an electronic specific cleaner. If cleaning doesn’t solve the problem, I recommend you just replace them.
Vehicle wants to stall in reverse. IAC (Idle Air Control) sensor could be the culprit in this case. Remove the IAC and clean it. If that doesn’t fix the problem then replace it with a new one.
Fluid is leaking from the front of the transmission. The two things I would look at are the front seal and the hub on the torque converter. If the vehicle sits for long periods of time, it is possible that the seal can dry up and become brittle. When it becomes brittle it loses its elasticity and can no longer hold fluid back. If the transmission has a lot of miles on it, then the hub on the torque converter may have worn where is makes contact with the front seal. In this case the converter will need to be replaced. Both problems will require the removal of the transmission from the vehicle.
The transmission revs high in all the forward gears. The problem is most likely that the torque converter clutch is not engaging. It could be caused by a fault solenoid, a stuck valve or a worn clutch inside the torque converter.
Transmission shifts hard into second and only after the rpms have gone very high. The problem here is the intermediate clutch pack is starting to fail. The only solution is to pull the transmission and replace the clutches.
The transmission has a hard 1-2 shift. The problem here could be the 1-2 accumulator stuck in its bore or broken. Remove the accumulator and check the bore for wear marks. Clean the bore with a fine grit emery cloth and make sure the rings on the accumulator are not damaged or stuck. Another cause could be a defective line modulator valve, but this would most likely cause a problem in all the other gears, too.
You need to work with your customer to solve their transmission problems. Teach your staff to give the same great service and you’ll build trust. Think of this as a form of executive coaching. You are the expert, and you are imparting your wisdom to your client. You don’t need to just fix the problem, you need to educate your customers so that they know the warning signs of a faulty transmission. This will save them money and make them a long term customer.