On Fri, 16 Jun 2006 17:43:16 GMT, "David N. Makinson"
If you are looking for a quicker firmer, crisper shift, you
won't get it with the TCM. I do not recall whether the '92
had a TCM or was controlled by the ECM like the '93 up
versions but, I do know that the major problems can only be
addressed with valve body and pump mods to get it cooking.
You can install part of a shift improver kit in the valve
body with the trans in the vehicle. The rest of the kit has
to be installed in the pump which requires removal of the
trans from the truck. It is a big heavy trans and this can
be a bear of a job if you do not have a trans jack to handle
it. Once you pull it out, it would be a waste of time and
effort to not rebuild it and install a new converter. These
are not cheap transmissions to build and are not forgiving
of repair mistakes. Having been there and built a few of
them, I wouldn't touch a thing unless you are prepared to do
it all. If you perk up part of it, there will likely be
some stress added to the components and it will fail if not
up to par all the way thru. All that said, the E4OD is
plenty strong and reliable after it is fully updated and has
a few minor mods done to improve shifting and reliability.
If you have never done this, it is easy to waste it with a
mistake. It will be expensive to properly repair.
Thank you. Yes I just had it rebuit, with a Jr. shift kit, converter,
updates.... $1740 total. I was just wanting to improve the un-lock
downshift pattern, but looks like that is too much trouble.
On Fri, 16 Jun 2006 20:56:16 GMT, "David N. Makinson"
Exactly what is it you are trying to accomplish? I
installed an interceptor in the wire harness of mine which
allows me to externally increase line pressure
electronically if needed and to delay the lockup of the
converter to allow the engine a few more revs before
locking. It also unlocks the converter on each shift so the
engine doesn't bog. With the complete shift kit installed,
it feels like a 6 or 7 speed trans while accelertaing as you
can feel both the shifts and the lockups which have minimal
lock time. I don't even know if the interceptor is still
made. You can install the interceptor easily enough
externally into the harness connector at the rear of the
trans - not tools needed. If they installed the same sort
of kit as most others, the required work has already been
done in the pump to improve some of the slushiness. You do
need to be careful of too much line pressure in this unit
because you can get to the point that it downright hurts in
the seat of the pants when it shifts. Mine feels more like
a decent C6 when it shifts. I do not like a particularly
hard shift but I want to know it shifted.
What I don't like is when it is in 4th and locked, and one progressively
pushes the gas (opens the throttle), as in approaching and going up a
hill, if the tranny unlocks, it always also shifts to 3rd. Often,
unlocking was all that was needed to give enough torque / rpm increase
to make it up the hill, but it downshifts anyway. My Hondas and Toyotas
all just unlock. Then, if the hill is real steep, they will downshift
to third. To me, this is a better approach.
That's the way my 89 van with E4OD shifted also, so yours is behaving
normally. I didn't like that either, and would sometimes save the inertial
otherwise lost by the locked converter by just hitting the OD cancel button
On Sat, 17 Jun 2006 12:30:25 GMT, "David N. Makinson"
Your's sounds as if it is working the way it is supposed to
work. I have found that the converter unlock can be changed
by calibration of the valving in the pump but is hit and
miss. They were programmed that way to keep the heat down
in 4th which is a 30% overdrive. Much less heat is
generated in 3rd which is direct. Some of the later models
which were controlled by the ECM would unlock the converter
but, the down side of that is acelerated converter wear from
the frequent locK/unlock cycle. Some of them were
programmed to lock in 3rd and remain locked during the 3-4
upshift to reduce stress and heat that may be caused under
load while upshifting. This seems to work better in a truck
where it has a good chance of working harder than a car
trans. Also, I hope you have installed a good add-on cooler
to this trans. Ford never could make up their mind whether
it needed one or not even with a tow package. My POV is
that I never heard of a transmission failing from
overcooling - that is not true of overheating.
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