E4OD no drive nor reverse
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5th Gear
Joined: Feb 2019
Posts: 5
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From: Cincinnati
E4OD no drive nor reverse
howdy guys
I gots a 1990 F350 with a transamission problem thats got me stumped
Two weeks ago the transamission failed attempting to take off from a dead stop. There was a loud pop and then no power transmitted to the driveshaft at all
Additionally, the transamission started making a growl like a sound of a hydraulic pump low on fluid, in all PRNDL positions.No reverse and no forward drive.
I assumed the front pump or converter was toast, so I pulled the unit from the vehicle and completely disassembled it.I pulled the front pump halves apart and see no damage. Removed the pressure regulator valve from the pump and likewise no damage. Looking inside the drained converter, also see no damage. No other problems were apparent elsewhere in the transamission.
Unit was professionally rebuilt and upgraded about 40K miles ago, gave good service until failing suddenly. Any idea on where to look? I am certain its either a hydraulic or mechanical problem up in the front somewhere I reckon.
I gots a 1990 F350 with a transamission problem thats got me stumped
Two weeks ago the transamission failed attempting to take off from a dead stop. There was a loud pop and then no power transmitted to the driveshaft at all
Additionally, the transamission started making a growl like a sound of a hydraulic pump low on fluid, in all PRNDL positions.No reverse and no forward drive.
I assumed the front pump or converter was toast, so I pulled the unit from the vehicle and completely disassembled it.I pulled the front pump halves apart and see no damage. Removed the pressure regulator valve from the pump and likewise no damage. Looking inside the drained converter, also see no damage. No other problems were apparent elsewhere in the transamission.
Unit was professionally rebuilt and upgraded about 40K miles ago, gave good service until failing suddenly. Any idea on where to look? I am certain its either a hydraulic or mechanical problem up in the front somewhere I reckon.
Thread Starter
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5th Gear
Joined: Feb 2019
Posts: 5
Likes: 0
From: Cincinnati
Thanks for replying
Theres no transfer case and I ruled out the axle and driveshaft, since it holds park on a hill. Also, when the engine is running in drive or reverse, theres no abnormal noise at all coming from the drivetrain except the groaning pump noise being emitted from the transamission. This noise is occuring while the engine is running and the trans is in any PRNDL position, and raised in tone proportional to engine rpms
Theres no transfer case and I ruled out the axle and driveshaft, since it holds park on a hill. Also, when the engine is running in drive or reverse, theres no abnormal noise at all coming from the drivetrain except the groaning pump noise being emitted from the transamission. This noise is occuring while the engine is running and the trans is in any PRNDL position, and raised in tone proportional to engine rpms
Frmr Ford Trans Engr
Joined: Aug 1999
Posts: 24,732
Likes: 2,659
From: SE Florida
Something broke, but I can't see what it was from here. It could be inside the torque converter, the only way to know for sure is to cut it open. Otherwise, it is something mechanical that broke inside the transmission.
Cargo Master
Joined: Mar 2007
Posts: 2,851
Likes: 1,034
I had a similar problem 15-20 years ago. I was in a hurry so the job was sublet to a transmission shop [one of the worst decisions in my life]. According to the shop that 'fixed' my problem said the front pump broke. I got it back in a week along with problems I never had before.
Thread Starter
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5th Gear
Joined: Feb 2019
Posts: 5
Likes: 0
From: Cincinnati
Some test results:
The stator is freewheeling inside the converter, when I engage it using the stator support shaft. Practically no resistance in either direction
It does this both empty and full of fluid
According to my research, this is no bueno and indicative of a broken overrunning clutch
When the transamission broke, I was pulling a 5000lb trailer. Too much drag for a broken stator to get moving even a little bit? Seeming plausible to me
The stator is freewheeling inside the converter, when I engage it using the stator support shaft. Practically no resistance in either direction
It does this both empty and full of fluid
According to my research, this is no bueno and indicative of a broken overrunning clutch
When the transamission broke, I was pulling a 5000lb trailer. Too much drag for a broken stator to get moving even a little bit? Seeming plausible to me
Last edited by Phoron; Nov 10, 2023 at 11:52 AM.
Frmr Ford Trans Engr
Joined: Aug 1999
Posts: 24,732
Likes: 2,659
From: SE Florida
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Butt-Head
Joined: Apr 2004
Posts: 9,453
Likes: 2,936
From: Reed Point, MT
Some test results:
The stator is freewheeling inside the converter, when I engage it using the stator support shaft. Practically no resistance in either direction
It does this both empty and full of fluid
According to my research, this is no bueno and indicative of a broken overrunning clutch
When the transamission broke, I was pulling a 5000lb trailer. Too much drag for a broken stator to get moving even a little bit? Seeming plausible to me
The stator is freewheeling inside the converter, when I engage it using the stator support shaft. Practically no resistance in either direction
It does this both empty and full of fluid
According to my research, this is no bueno and indicative of a broken overrunning clutch
When the transamission broke, I was pulling a 5000lb trailer. Too much drag for a broken stator to get moving even a little bit? Seeming plausible to me
Had the same thing happen to me a few years ago during a 2-3 upshift getting a 6000 lb. load up to speed on an interstate on-ramp. I was unsure of what happened but I was going fast enough already for the torque converter clutch to apply when I let off of the accelerator and I drove another 15 miles. Stopped at the stop sign at the next exit - done. No movement.
Nothing broken on disassembly. No metal in anything (miraculously). Threw a new torque converter in it and it's been happy since.
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Thread Starter
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5th Gear
Joined: Feb 2019
Posts: 5
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From: Cincinnati
well I finally got to inspecting the remains a little more closely and i notice the overdrive planet carrier is busted where the input shaft splines into it
it is the long nose variant, 1.9" hub length, aluminum w 3 planet gears
I can get another for 75 bux but would rather upgrade to a steel 4 gear type
I see there are kits in a couple different sites which claim to be some retrofit update that includes a matching input shaft
Anyone ever use these? Any known issues? I hate the idea of puttin' an aluminum planet carrier back on there.
edit: I found a related thread that answers my question https://www.ford-trucks.com/forums/1...cracked-2.html
thanks guys
it is the long nose variant, 1.9" hub length, aluminum w 3 planet gears
I can get another for 75 bux but would rather upgrade to a steel 4 gear type
I see there are kits in a couple different sites which claim to be some retrofit update that includes a matching input shaft
Anyone ever use these? Any known issues? I hate the idea of puttin' an aluminum planet carrier back on there.
edit: I found a related thread that answers my question https://www.ford-trucks.com/forums/1...cracked-2.html
thanks guys
Last edited by Phoron; Feb 8, 2024 at 03:53 PM.
Cargo Master
Joined: Mar 2007
Posts: 2,851
Likes: 1,034
I've updated my E4OD last summer. I did all kinds of updates, some that I probably did not need. There are plenty of sites indicating what to update. All I know is that I had all steel gears and two of them had 6 planets. The other one had 4. I went through a small block E4OD and there was little that I actually swapped over. Overkill but I have a tendency to do that.
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