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Ford E4OD and 4R100 Transmission information
Ford introduced the
E4OD transmission in
F series trucks and
E series vans. the
E40D transmission was available
in F150-F350 trucks,
full size Bronco SUV
and E-150-E350 Vans.
The E4OD transmission
is a C-6 automatic transmission
with electronic controls and an
Ford renamed the E4OD
transmission as the
4R100 transmission. there are
some differences however its the same
they also gave some 4R100 models
a PTO option.
The E4OD can be
found behind a 6 cylinder 300 CID engine
up to the 7.3 ltr. diesel engines.
The 4R100 after 1998
will be found behind the 5.4 ltr.
engines up to the Diesel power
Technical information for Ford E4OD
and 4R100 Transmissions
including harness connector pin
identification and pressure testing
Complaint: E4OD/4R100 Torque converter shudder, feels like running over washboard
Cause: Several things can be the cause here, one simply being the fluid is
deteriorated badly and a fluid and filter change may remedy the problem. Second
is the converter clutch is glazed, damaged or other issue in the torque
converter. Third is that the bushings in the transmission are worn and causing
leakage in the converter ckt. if changing the fluid does not remedy the problem
and there's some mileage on the vehicle we recommend rebuilding the whole unit
with good reman converter to rule out any issues. On the Diesel and V-10
engines its highly recommended to use a converter with Billet front cover to
prevent warpage and HD clutch.
Complaint: E4OD/4R100 stalls engine when put into gear.
Stalls in reverse.
Cause: When engine stalls when put into forward and reverse gears, may be hot or
cold, or all the time the likely problem is that the lock up solenoid is
mechanically stuck. you will need to replace the solenoid pack. (be sure pan
isn't full of metal etc that has caused the stuck solenoid)
If transmission stalls when put into reverse only check the fluid level as low
fluid levels can cause this as not enough release oil to clutch and will stall
engine in reverse cold, maybe hot. Other causes can be stuck valves in the valve
body and or even the converter has an issue inside.
1994-1995 trucks only: if all else is ok you may have speedometer computer
failed and showing excessive vehicle speed to the TCM and the truck goes into
what's called over speed protection, and it shuts off the fuel pump. The
speedometer may be telling the ECM the truck is going 100 MPH when put into gear
and will shut off fuel. you can test this by disconnecting the Vehicle speed
sensor which will shut off vehicle speed. if your problem goes away you may need
a new speedometer module.
Complaint: Ford truck E4OD/4R100 trouble code 62 or
Cause: code 62 or P0628 means you have no lock up and or slipping lock up. It
may feel like lock up is working fine. some reasons for this code can be the
converter clutch, TCC solenoid, Valve stuck in the pump and a common one can be
worn sun shell bushings in the gear train and or stator support. Worn sun shell
bushings will send you diagnosing for ever for this code.
Complaint: 4R100 No second gear, 2001 model years only.
Cause: Ford tried to use a mechanical diode for the intermediate Sprague this
year and it dident work so well. If you have no 2nd gear in model year 2001
truck you will need to rebuild transmission/replace intermediate Diode and 2rd
drum with older or newer version sprague/drum. Never use mechanical diode drum/sprague
when rebuilding transmission.
Complaint: 4R100 PTO, no PTO operation.
Cause: The TCM applies the overrun clutches to operate the PTO on these
transmissions, if all external electrical diagnosis has been done and still wont
operate you may have failed overun clutches and or snap ring popped, worn out of
drum causing no clutch apply and thus no PTO or weak PTO operations. one test to
see if clutches are working is to drive truck up to 30-40 MPH and shut off
overdrive switch, with foot off accelerator, you should feel significant engine
braking if the clutch pack is holding, if just coasts away you've found your
Complaint: No lock or cycling lock up in and out, no
lock up at low throttle, no codes.
Cause: Check to see if truck has LED tail lights installed and if does this is
likely your problem as the BOO resistance is too high due to the LED bulbs. You
can add a 6OHM 50 Watt resistor to the brake/turn signal power ckt to remedy
this issue to keep LED bulbs.
Complaint: E4OD/4R100 no up shift and possible no
Cause: If you have no speedometer and no up shift you may have faulty speed
sensor, some trucks have the speed sensor in the rear differential housing. you
may or may not have VSS codes. If you have speedometer operation and no up shift
with only VSS codes or no codes you need to check that ECM is receiving VSS
signal. The signal branches off from sensor to speedometer, ECM and cruise
control, and its not too uncommon to loose one part in wiring etc.
Complaint: Ford truck All the transmission fluid blows
out of bell housing, overheated, snow plowing, towing.
Cause: Sometimes you can have sudden severe transmission fluid loss out of front
seal, bell housing area when working the truck hard such as snow plowing, towing
heavy loads, (usually during hot weather)
Don't assume the seal is bad or you have another problem, it may have simply
overheated due to heavy use or hot weather etc. most times you can let cool down
and refill transmission with new fluid and drive away. earlier trucks can have
updated seal installed which has been in production for many years and in all
overhaul kits etc. The real fix here is to check cooling system, add air to oil
cooler on top of radiator if doesn't already have one and or install larger
cooler. make sure you don't have any kinked lines etc that can be contributing
to this issue. You can have internal issues such as slipping TCC or clutches etc
causing overheat as well. This may show up without heavy use. On earlier E4OD
trucks if you have 5/16 cooling lines change over to 3/8 lines and will make a
difference of several degrees during operation.
Complaint: E4OD/4R100 Cracked around bell housing or
rear 4x4 case adapter.
Cause: A cracked case such as around the bell housing or sometimes around the
4x4 adapter in 4x4 trucks is almost always related to a vibration from such
source as bad or frozen u-joints in rear shaft, bent drive shaft, misaligned
such as from lift kits etc. If you replace a case for this reason make sure you
find the cause or it will be back broken again.
In some cases you can have corrosion build up between the bell housing and
engine block which can push the transmission off the engine and break the bell
housing area right around the bolt areas. this will look different than a
vibration crack due to its close location to the engine block and when
transmission is removed you will see the festering corrosion between the two
Complaint: E4OD diesel engines only: limp mode or starts
in high gear, no tachometer, no codes.
Cause: On the 7.3 diesel engines there is an engine rpm sensor on the timing
cover and can fail with no signal to TCM. this can create situation where TCM
doesn't know engine is running so wont actually turn on solenoids when you drive
the truck. if completely dead your tachometer wont operate. can also be
jumpy tachometer or no low rpms etc causing all kinds of shifting issues.
Complaint: Sudden loss of forward movement only, has
reverse and was working fine before.
Common issue here can be the forward drum splines have stripped out where the
input from front carrier goes into drum. This will require rebuild/replacement
of forward drum. always check these splines for wear when rebuilding
transmission. This problem was more prevalent on older 6 cylinder trucks.