Hesitating E4OD
Thread Starter
|
New User
Joined: Jan 2008
Posts: 11
Likes: 0
Hesitating E4OD
The E4OD on my 1991 E-350 7.3 created this problem a few says ago: When I put it in D, 2 or 1, it won't go forward. Just like it was still in Neutral. Reverse works OK. After a little while, if I rev the engine to about 2000 rpm the 1st gear finally engages, a little harsh because of the high rpm. Then it feels like slipping just a little for the next 10-20 seconds. After that all feels OK. All the gears work just like they should. If I stop the van and accelerate again, all the gears work perfectly unless I put it in Neutral for more than one second. If I do, the symptoms return, except that it doesn't slip anymore.
The transmission was overhauled 2 months ago. After that it had occasionally this no-drive symptom a couple of times, but it disappeared almost immediately by putting it in reverse shortly, or shutting and starting the engine again. A TransGo shift kit was installed during the overhaul.
The symptom is the same in D, 2 or 1 except that when I put it in 1, it feels like the van tried to move rearward, but just slightly. Before this, I also had the feeling that the van moves too fast in Reverse.
I have replaced the Throttle Position Sensor, but it didn't help.
The transmission was overhauled 2 months ago. After that it had occasionally this no-drive symptom a couple of times, but it disappeared almost immediately by putting it in reverse shortly, or shutting and starting the engine again. A TransGo shift kit was installed during the overhaul.
The symptom is the same in D, 2 or 1 except that when I put it in 1, it feels like the van tried to move rearward, but just slightly. Before this, I also had the feeling that the van moves too fast in Reverse.
I have replaced the Throttle Position Sensor, but it didn't help.
Post Fiend
Joined: Jan 2005
Posts: 8,402
Likes: 10
First do not sit reving the engine with the trans in D, you will cook it. Second I am no expert on the E4OD but it sounds to me like a faulty shift lever position sensor but wait for some of the experts to chime in. Again do not rev it in D.
Transmission Rebuilder
Joined: Jul 2008
Posts: 1,570
Likes: 63
From: North Georgia
My first thought is a hardened inner seal in the forward drum, or a problem with the sealing rings on the forward drum. You said it was overhauled so I am assuming that these items have been replaced and they are fine. I would check and see if the filter is correct and is still tight up in the pump, but this should also give you a problem in reverse. But lets start with square one, is the fluid level correct, idling in park on level ground?
Thread Starter
|
New User
Joined: Jan 2008
Posts: 11
Likes: 0
I didn't step on the accelerator for very long, just long enough to get the gear to engage.
All of the seals are new and the fluid level is correct. I did the overhaul work myself. I have overhauled automatic transmissions for decades, but this is my first E4OD. It didn't seem too difficult to overhaul. A hydraulic diagram for this transmission would be very helpful, but neither the 1991 Ford Shop Manual nor the ATSG book have one.
I will pull the oil pan and check the shift lever switch also next week.
All of the seals are new and the fluid level is correct. I did the overhaul work myself. I have overhauled automatic transmissions for decades, but this is my first E4OD. It didn't seem too difficult to overhaul. A hydraulic diagram for this transmission would be very helpful, but neither the 1991 Ford Shop Manual nor the ATSG book have one.
I will pull the oil pan and check the shift lever switch also next week.
Thread Starter
|
New User
Joined: Jan 2008
Posts: 11
Likes: 0
I did not find any bad connections and changing the MLPS to a known working one did not help, either. I also tried changing the valve and accumulator bodies from a good transmission, so the next thing to do is to take the transmission apart.
I have two other good solenoid packs, but there are differences in the oil holes in them. Is there interchangeability between solenoid packs from other years/gas/diesel transmissions?
I have two other good solenoid packs, but there are differences in the oil holes in them. Is there interchangeability between solenoid packs from other years/gas/diesel transmissions?
Transmission Rebuilder
Joined: Jul 2008
Posts: 1,570
Likes: 63
From: North Georgia
The solenoid blocks are different, make sure the holes match the one you take off. Also the plug connection are different too.
I personally dont think the solenoid block is your problem.
It sounds like the forward drum wont engage, most likely due to a "leak" in that circuit. I cant seem to come up with a oil schematic that I can post, but I'll keep looking.
With the valve body off you can aircheck the forward drum.
I personally dont think the solenoid block is your problem.
It sounds like the forward drum wont engage, most likely due to a "leak" in that circuit. I cant seem to come up with a oil schematic that I can post, but I'll keep looking.
With the valve body off you can aircheck the forward drum.
Thread Starter
|
New User
Joined: Jan 2008
Posts: 11
Likes: 0
I think I found out what caused the problem. One of the two Teflon rings on the neck of the Forward Clutch drum had gotten pinched when I assembled the transmission for the first time. About 10 mm of the ring was missing. It resulted in pressure loss in the clutch and therefore it eventually burned. Everything else in the transmission seemed to be o.k.
Thread
Thread Starter
Forum
Replies
Last Post
artsjunkremoval
1999 - 2016 Super Duty
4
Jul 30, 2012 06:08 PM
bentcipher
1999 - 2016 Super Duty
25
Oct 23, 2010 10:29 PM
fordmanbrian
Clutch, Transmission, Differential, Axle & Transfer Case
3
Oct 18, 2010 10:41 PM
F250_96_460_E4OD
Clutch, Transmission, Differential, Axle & Transfer Case
2
May 30, 2002 04:46 PM
