E4OD TCC still "Hunting"
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Joined: Jun 2005
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E4OD TCC still "Hunting"
I've posted questions on this before a received help and I have made changes to the truck but the problem persist.
I have a 1991 Ford F250 Diesel with an E4OD transmission. When the Check engine light was on the Code was for a Speed Sensor. I was also informed that the FIPL switch could also be bad and how to test. The FIPL/TP had the wrong voltages so I replaced it and the vehicle speed sensor. The FIPL now reads correctly but the problem persisted. I then, through alldata found that a bad Engine Speed sensor caused the same problems as I was experiencing so I replaced that as well. Problem is, the TCC still disingages and re-ingages as I'm going down the highway. I no longer have the Check Engine light and I show no error codes so now what do I do? (Other then take it to a shop which is what I seem to be headed for)
I have a 1991 Ford F250 Diesel with an E4OD transmission. When the Check engine light was on the Code was for a Speed Sensor. I was also informed that the FIPL switch could also be bad and how to test. The FIPL/TP had the wrong voltages so I replaced it and the vehicle speed sensor. The FIPL now reads correctly but the problem persisted. I then, through alldata found that a bad Engine Speed sensor caused the same problems as I was experiencing so I replaced that as well. Problem is, the TCC still disingages and re-ingages as I'm going down the highway. I no longer have the Check Engine light and I show no error codes so now what do I do? (Other then take it to a shop which is what I seem to be headed for)
Post Fiend
Joined: Nov 2004
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From: Manitoba
I suggest you look at oal connections to the trans....especially the on the one behind the heat shield pax side. Check for corrosion and bent pins etc etc.....
Special note:
To remove the solenoid plug, remove the heat shield."Do not use pry bars or screw drivers in attempt to remove plug" without shield removed.
Remove solenoid body connector by pushing on the center tab and pulling the wire harness.
To replace push down on solenoid connector until audible click is heard, then replace heat shield.
Special note:
To remove the solenoid plug, remove the heat shield."Do not use pry bars or screw drivers in attempt to remove plug" without shield removed.
Remove solenoid body connector by pushing on the center tab and pulling the wire harness.
To replace push down on solenoid connector until audible click is heard, then replace heat shield.
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Joined: Jan 2005
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My truck was doing this for a while. What it turned out to be was a corroided relay on the fire wall. Talking to some of my buddies they daid that it is pretty common for the washer fluid to be spilt all over the relay when refilling and corroiding the relay and the diagonistic connector.
good luck
good luck
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To anyone interested, the plug behind the heat shield had become dirty. I cleaned it and all works well.
TCC problem was the dirty plug. (TCC was locking then unlocking when cruising)
Check Engine light was the FIPL switch (Votlage was .6 at Idle, .8 at WOT)
Anit-Lock light was the wheel speed sensor on top the differential.
All these hit at the same time. A big Thanks! to all those that helped.
TCC problem was the dirty plug. (TCC was locking then unlocking when cruising)
Check Engine light was the FIPL switch (Votlage was .6 at Idle, .8 at WOT)
Anit-Lock light was the wheel speed sensor on top the differential.
All these hit at the same time. A big Thanks! to all those that helped.
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