Transmission questions
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Senior User
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From: San Jose, CA
Transmission questions
Hi all I have a few questions about what I ought to do w/ my transmission. 1990 F250 7.5l E4OD*.
X57000 miles on the truck w/ the trans being rebuilt at least once by PO, this was determined from a receipt found in the glove box.
*I was told it has the E4OD, I'm not sure it does or exactly how to check
X57000 miles on the truck w/ the trans being rebuilt at least once by PO, this was determined from a receipt found in the glove box.
- The steel cooling lines appear to be leaking. With the amount of rust on the truck I'm not too surprised. What's a good place to buy these?
- I think an attempt was made to install an aftermarket cooler. The stock cooling lines are 5/16 and the cooler has 3/8 inlets. If I'm not doing much towing, should I just put the cooling lines back to the radiator? Or should I put the aftermarket cooler in series since I already have it? Or should I leave it the way it is?
- I want to drop the pan just to have a look, replace the fluid and filter. I'm seeing that there are two types of filters, metal mesh and cellulose. Is one preferred over the other? Isn't the metal mesh the OE?
*I was told it has the E4OD, I'm not sure it does or exactly how to check
Last edited by woodson84; Sep 16, 2019 at 03:50 PM. Reason: forgot to add my note
Lead Driver
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From: Houston/Sugar Land
Looking on Rockauto. I see there are two Motorcraft E4OD filters for your truck. One for 4WD and one for RWD. RWD takes motorcraft FT113 4WD takes FT114. I think the difference is the neck on the filter. One is longer than the other. I believe the 113 is longer. I saw nothing about the components in construction. Sandy
Lead Driver
Joined: Feb 2002
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From: Greater Austin, Texas
Keep the aftermarket cooler so long as it is not the kind with a tube inside that just snakes back and forth. Every auto trans likes to stay as cool as possible and this is especially true of the E4OD.
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Senior User
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From: San Jose, CA
Do transmissions not have a thermostat? (Noob question?)
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Senior User
Joined: Apr 2019
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From: San Jose, CA
Looking on Rockauto. I see there are two Motorcraft E4OD filters for your truck. One for 4WD and one for RWD. RWD takes motorcraft FT113 4WD takes FT114. I think the difference is the neck on the filter. One is longer than the other. I believe the 113 is longer. I saw nothing about the components in construction. Sandy
Lead Driver
Joined: Feb 2002
Posts: 7,970
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From: Greater Austin, Texas
But isn't it better to use both the radiator and the aftermarket?
Depends on where you live. You should put them in series, yes, but it is more important to do this if you live where it is cold. This allows the radiator coolant to actually warm the ATF. If you live where it is warm, it can't hurt to put them in series, but it is not mandatory.
Do transmissions not have a thermostat? (Noob question?)
No they do not.
Frmr Ford Trans Engr
Joined: Aug 1999
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From: SE Florida
Yes it is.
They didn't have thermostats when this trans was built but they do have them now.
I haven't seen a metal mesh OEM filter. All the ones I've seen are cellulose.
Depends on where you live. You should put them in series, yes, but it is more important to do this if you live where it is cold. This allows the radiator coolant to actually warm the ATF. If you live where it is warm, it can't hurt to put them in series, but it is not mandatory.
This is an old wive's tale that just won't die. The radiator cooler never warms the ATF. Ever. In any condition. For the last three years of my Ford career I was a transmission cooling engineer. I tried to find a condition where the radiator warmed the trans fluid. I tested it as cold as -40°F and NEVER found a condition where the coolant in the cold side of the radiator was warmer than the ATF coming into the cooler. It just doesn't happen.
They didn't have thermostats when this trans was built but they do have them now.
Depends on where you live. You should put them in series, yes, but it is more important to do this if you live where it is cold. This allows the radiator coolant to actually warm the ATF. If you live where it is warm, it can't hurt to put them in series, but it is not mandatory.
This is an old wive's tale that just won't die. The radiator cooler never warms the ATF. Ever. In any condition. For the last three years of my Ford career I was a transmission cooling engineer. I tried to find a condition where the radiator warmed the trans fluid. I tested it as cold as -40°F and NEVER found a condition where the coolant in the cold side of the radiator was warmer than the ATF coming into the cooler. It just doesn't happen.
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My trans isn't plumbed to the radiator at all right now, just the oil cooler which is not meant for this truck I don't think. It's got 3/8" lines while the cooling lines are 5/16 (probably 8mm).
Where should I put a gauge for a transmission temp sensor if I want to install one? I know I saw it somewhere else but now I can't find it :/
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Frmr Ford Trans Engr
Joined: Aug 1999
Posts: 24,741
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From: SE Florida
The best place for a temp sensor is in the test port on the driver's side of the trans. It's towards the front of the trans, just above the pan. It has a black hex plug in it from the factory.
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