1990 e4od question
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Tuned
Joined: Nov 2007
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1990 e4od question
i have a 1990 ford superduty with a 7.3 with a e4od tranny that is sluggish to take off from a dead stop(easier to start from 2nd gear), and wont downshift on its own if you step into it going up a hill pulling a load.
all the other gears work great.
Fluid doesnt smell burnt or anything.
I was thinking of rebuilding it myself as the repair shops want between $2,100-2,700 to rebuild it and i cant locate a good used one.
My question is, would you guys think it is in the clutches or the valve body? Also, can i pull the clutches/guts out without removing the valve body components to reduce the risk of missplacing some stuff till i get to that section.
all the other gears work great.
Fluid doesnt smell burnt or anything.
I was thinking of rebuilding it myself as the repair shops want between $2,100-2,700 to rebuild it and i cant locate a good used one.
My question is, would you guys think it is in the clutches or the valve body? Also, can i pull the clutches/guts out without removing the valve body components to reduce the risk of missplacing some stuff till i get to that section.
Frmr Ford Trans Engr
Joined: Aug 1999
Posts: 24,738
Likes: 2,666
From: SE Florida
If you install a new transmission it's going to do the same thing. If you rebuild this one it's going to do the same thing. The problem isn't inside the transmission.
Have you tried to run self test? Ford ? OBD Trouble Codes
I'll bet that won't work because I believe your computer isn't getting powered. When that happens the transmission is always in fourth gear, unless you move the shifter to 2. It will be really sluggish from a dead stop, unless you move the shifter to 2. It also will never downshift on it's own.
There is a relay that supplies power to the computer. They are known to fail and cause this.
Have you tried to run self test? Ford ? OBD Trouble Codes
I'll bet that won't work because I believe your computer isn't getting powered. When that happens the transmission is always in fourth gear, unless you move the shifter to 2. It will be really sluggish from a dead stop, unless you move the shifter to 2. It also will never downshift on it's own.
There is a relay that supplies power to the computer. They are known to fail and cause this.
Fleet Owner
Joined: Jul 2006
Posts: 20,382
Likes: 845
From: Mi'kma'ki
when your trans (well,teca i should say here) isn't getting power,the OD light should be on dim (aprox half the brightness as when it's normally pushed,when you cancel od.someone told me,that yes this happens even with the 8th gen trucks with the button/light on the dash.)
you should also find that D is top gear and sluggish (though with the f450 and steep gears,probably not quite as bad as the pickups)
then when you place the shift lever in 1 and 2 positions,it should give you 2 gear and much easier starts.
now,you could still find the fuses/fuse links and power through the relay is all good.instead you might find a poor connection at the solenoids themselves.
if your TECA is getting power,then inspect the bulkhead connector;
https://www.ford-trucks.com/forums/1...s-harness.html
it should be a fairly easy fix.meanwhile,you could make due by manually downshifting on take off,and downshifting to 2 when you need it on hills........but it's probably just a fix that could take between 30 seconds to 30 minutes.
you should also find that D is top gear and sluggish (though with the f450 and steep gears,probably not quite as bad as the pickups)
then when you place the shift lever in 1 and 2 positions,it should give you 2 gear and much easier starts.
now,you could still find the fuses/fuse links and power through the relay is all good.instead you might find a poor connection at the solenoids themselves.
if your TECA is getting power,then inspect the bulkhead connector;
https://www.ford-trucks.com/forums/1...s-harness.html
it should be a fairly easy fix.meanwhile,you could make due by manually downshifting on take off,and downshifting to 2 when you need it on hills........but it's probably just a fix that could take between 30 seconds to 30 minutes.
Lead Driver
Joined: Jul 2007
Posts: 7,868
Likes: 9
From: Rhode Island
- Fuel Injector Pump Lever Sensor Input Is Out Of Self Test Range (Diesel)
- Shift Solenoid 1 Circuit Failure
- Shift Solenoid 2 Circuit Failure
- Converter Clutch Solenoid Circuit Failure
- Torque Converter Clutch Solenoid Circuit Failure
- Insufficient Input From Vehicle Speed Sensor (To 1992)
- Transmission Fluid Temperature Circuit Open
- Electronic Pressure Control Circuit Failure
- Transmission Control Switch/Overdrive Cancel Switch Circuit Did Not Change States
- Transmission Fluid Temperature Sensor Input Out Of Self Test Range (5.0L, 5.8L, 7.3L & 7.5L Truck)
- A couple of the codes either don't exist (50) or don't make sense given the application (76)
Make sure your solenoid pack connector is plugged into the transmission (passenger side). If it is plugged in, either your solenoid pack has completely failed internally, or there is a huge wiring fault somewhere in your truck between the ECU and the transmission.
- Shift Solenoid 1 Circuit Failure
- Shift Solenoid 2 Circuit Failure
- Converter Clutch Solenoid Circuit Failure
- Torque Converter Clutch Solenoid Circuit Failure
- Insufficient Input From Vehicle Speed Sensor (To 1992)
- Transmission Fluid Temperature Circuit Open
- Electronic Pressure Control Circuit Failure
- Transmission Control Switch/Overdrive Cancel Switch Circuit Did Not Change States
- Transmission Fluid Temperature Sensor Input Out Of Self Test Range (5.0L, 5.8L, 7.3L & 7.5L Truck)
- A couple of the codes either don't exist (50) or don't make sense given the application (76)
Make sure your solenoid pack connector is plugged into the transmission (passenger side). If it is plugged in, either your solenoid pack has completely failed internally, or there is a huge wiring fault somewhere in your truck between the ECU and the transmission.
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Thread Starter
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Tuned
Joined: Nov 2007
Posts: 276
Likes: 0
[QUOTE=Lead Head;16074151]- Fuel Injector Pump Lever Sensor Input Is Out Of Self Test Range (Diesel)
- Shift Solenoid 1 Circuit Failure
- Shift Solenoid 2 Circuit Failure
- Converter Clutch Solenoid Circuit Failure
- Torque Converter Clutch Solenoid Circuit Failure
- Insufficient Input From Vehicle Speed Sensor (To 1992)
- Transmission Fluid Temperature Circuit Open
- Electronic Pressure Control Circuit Failure
- Transmission Control Switch/Overdrive Cancel Switch Circuit Did Not Change States
- Transmission Fluid Temperature Sensor Input Out Of Self Test Range (5.0L, 5.8L, 7.3L & 7.5L Truck)
- A couple of the codes either don't exist (50) or don't make sense given the application.
I was a thinking the pack is probably bad with the 1 and 2 being bad
]
- Shift Solenoid 1 Circuit Failure
- Shift Solenoid 2 Circuit Failure
- Converter Clutch Solenoid Circuit Failure
- Torque Converter Clutch Solenoid Circuit Failure
- Insufficient Input From Vehicle Speed Sensor (To 1992)
- Transmission Fluid Temperature Circuit Open
- Electronic Pressure Control Circuit Failure
- Transmission Control Switch/Overdrive Cancel Switch Circuit Did Not Change States
- Transmission Fluid Temperature Sensor Input Out Of Self Test Range (5.0L, 5.8L, 7.3L & 7.5L Truck)
- A couple of the codes either don't exist (50) or don't make sense given the application.
I was a thinking the pack is probably bad with the 1 and 2 being bad
]
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From: Mi'kma'ki
Thread Starter
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Tuned
Joined: Nov 2007
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i did check the plug connections and thy are all very clean and shiny as the tranns was rebuilt(after i got ahold of previous owner). Which one would it be under the hood so i can check and clean that one?
Lead Driver
Joined: Jul 2007
Posts: 7,868
Likes: 9
From: Rhode Island
If you can find a pinout of the solenoid pack connector, it would be pretty trivial to hook up power and ground and test each individual solenoid to see if it clicks or not.
You could also use a multimeter to check the resistance of the solenoid coils.
You could also use a multimeter to check the resistance of the solenoid coils.
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