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  #1  
Old 01-20-2008, 11:40 AM
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Notice for all Ford trucks with the E40D transmission

To everyone that has a 90's or newer Ford with the E4od transmission.
DO NOT Run your truck with the HAZARD lights on.
By doing so will cook your transmission.
The torque converter lock up solenoid is controlled by your brake lights. Every time they flash they switch the solenoid on/off.
By doing that it ends up destroying your transmission !
Just an FYI for you Ford owners.
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Ford found the problem.. they even circled it and highlighted it in blue

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Old 01-20-2008, 11:51 AM
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just a Q..

fords have an electronically controlled toque converters?
How is this accheved?
I know how a torque converter works, so how does this work?
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Old 01-20-2008, 12:06 PM
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It is the TCC lockup solenoid that is the issue. I can't go into the specifics as I am not that knowledgeable on the electrical breakdown of it. I worked for a transmission shop for 3+ yrs and after R&R ing hundreds of em for that specific issue I am bringing it to the attention of as many ford owners as possible. I have been told by the owner/builder at that shop and also from a Ford service management about the exact cause of failure.
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93 chevy k1500 6.2 diesel fisher mm 8'
97 chevy k3500 6.5 diesel fisher mm 9 '
98 chevy k1500 5.7 3/4 ton susp 8 ' fisher mm
95 chevy 2500 5.7 with 7.5' fisher mm
94 chevy k3500 dually 6.5 w 9 ' fisher mm
2011 bobcat skid
3 trojan 1900 loaders

Ford found the problem.. they even circled it and highlighted it in blue

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Old 01-20-2008, 07:27 PM
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Quote:
Originally Posted by SnoFarmer View Post
just a Q..

fords have an electronically controlled toque converters?
How is this accheved?
I know how a torque converter works, so how does this work?
Most all lock up converters are electronically controlled SF...only the very early units relied totally on hydraulic activation...Ford's AOD's are an example.

The clutch in the TC is still hydraulically applied, but the hydraulic activation is controlled by an electric on/off solenoid (exactly like a valve/solenoid on a plow pump). The ECM uses many different input readings from different sensors, including the brake light switch like street frog mentioned to decide when the TC should be engaged or released..or in the late model stuff, held somewhere in between.
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Old 01-20-2008, 07:28 PM
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FYI: Most of the newer stuff (GM especially) actually cycle the TC clutch on and off dozens of times per second...this allows for a smooth, controlled and easy apply and release on the clutch so the driver never feels the TC lock or unlock. GM refers to it as "EC3" converter strategy.

Last edited by B&B; 01-20-2008 at 07:34 PM.
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Old 01-21-2008, 01:21 AM
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Well, good thing I don't own a ford.
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Old 01-21-2008, 02:17 AM
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Thank you B&B You explained where I couldn't seem to get the point out. thank you.
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93 chevy k1500 6.2 diesel fisher mm 8'
97 chevy k3500 6.5 diesel fisher mm 9 '
98 chevy k1500 5.7 3/4 ton susp 8 ' fisher mm
95 chevy 2500 5.7 with 7.5' fisher mm
94 chevy k3500 dually 6.5 w 9 ' fisher mm
2011 bobcat skid
3 trojan 1900 loaders

Ford found the problem.. they even circled it and highlighted it in blue

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Old 01-21-2008, 07:52 PM
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I never would have thought of that. Good to know.
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Old 01-23-2008, 06:37 AM
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one would think that it would be controlled by a brake sensor not a flashing tail light
interesting though
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Old 01-23-2008, 06:47 AM
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Ahhh But thats the thing. It is controlled by the brake light Circuit. Of which the hazard lights run through. Hence the problem with doing so.
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93 chevy k1500 6.2 diesel fisher mm 8'
97 chevy k3500 6.5 diesel fisher mm 9 '
98 chevy k1500 5.7 3/4 ton susp 8 ' fisher mm
95 chevy 2500 5.7 with 7.5' fisher mm
94 chevy k3500 dually 6.5 w 9 ' fisher mm
2011 bobcat skid
3 trojan 1900 loaders

Ford found the problem.. they even circled it and highlighted it in blue

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  #11  
Old 01-23-2008, 09:21 PM
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Good to know! So is there a recall on this or what? Interesting to say the least.
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Old 01-23-2008, 09:30 PM
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Try and find a wiring diagram of where this thing ties into the brake circuit and add a diode just after it. That way the flashers won't backfeed and and kick it out. I's sure the point of this is to turn off the tc lockup so you can actually stop.
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Old 01-23-2008, 09:32 PM
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whats the source of this info??
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Old 01-24-2008, 12:28 AM
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So I probably shouldn't be power braking my Ford???
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  #15  
Old 01-24-2008, 01:22 PM
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Brake switch is actually several switches inside. Seperate circuits for the actual lighting and signal to PCM. That's why your cruise control doesn't shut off when you activate turn signal or hazard. The PCM looks at several inputs (speed,gear,load,rpm,temp,throttle pos. etc.) and decides to lock or what % to lock the converter. If trans. is failing because of hazard light operation it's probably because if your hazards are on something outside of normal operation is occuring - snowplowing, pulling heavy load etc.
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Old 01-24-2008, 02:17 PM
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So how do you tell if you have that transmission? E4od??
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Old 01-24-2008, 02:20 PM
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Quote:
Originally Posted by StoneDevil View Post
whats the source of this info??
good question
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Old 01-24-2008, 03:45 PM
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Here is the connector view from Alldata for a 2003 F-350. 4r100 trans. Updated version of E4OD. The signal to PCM that controls the trans. is a completely seperate circuit from the lighting system. There are seperate contacts inside the brake switch. I've even taken them apart and looked. If you don't believe me drive down the highway at 60 mph and activate your hazard lights. If this circuit controlled TCC you would feel a "trailer hitching effect" or what may feel like the trans. shifting up and down as the lights flashed. You would see the tach bounce as well. The engineers who designed this system definitely made some mistakes but this was not one of them. If you want to help your E4OD get a reputable trans. shop to recommend and install a valve body kit (shift kit) such as a sonnex. These trans. are very expensive $2500.-3000. to replace with oem and double that for an extreme duty unit. It would be worth your time to talk to a trans. specialist (reputable) about a kit, and keep them serviced. 4X4 LOW is your friend.
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Old 01-24-2008, 05:56 PM
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I have a light on my truck when the T/C is locked the light is green. I drove down the high way and turned on my flashers and the light did not blink. Plus the T/C usually wont lock up when plowing anyways unless your are going pretty fast.
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Old 01-24-2008, 06:21 PM
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Quote:
Originally Posted by rjfetz1 View Post
So how do you tell if you have that transmission? E4od??
You do not have it in your 06.
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