hi welcome to lots of transmission you're in Curts corner we've got a lot of
questions on how to install torque converters today we're specifically
going to go over the AOD transmission and this will be the same procedure if
you have an AODe 4R70 w 4R75 those transmissions all the similar design and
the same type of converter install onto the front of the transmission so all of
those converters on the Fords have mounting studs then there's the studs on
the back of the converter right here okay they have four mounting lugs okay
and the critical thing with these is the alignment so a lot of these converters
have especially of these have a drain plug so what you want to do is when you
install the converter you want to rotate the converter around to where the stud
with the drain plug is on the bottom the very bottom okay and that will make it
easier for you when you're installing the transmission onto the engine that
the converter is already lined up because you've rotated the flywheel
around for the mounting holes on the flywheel so this is the flywheel a
typical Ford 5.0 liter okay and these large holes are for the drain plug on
the transmission the smaller holes next to it is for the studs of the converter
so this one has multiple but some fly wells only have one or two elongated
holes so you have to ensure that you line them up at the bottom so you have
to rotate the engine around where it did fly way around and the fly ball stays on
the engine so you're not to remove it but for demonstration purposes we're
going to show you after the converters installed how the converter should fit
and look sticky through the flywheel so we're going to start by installing the
converter again we want to ensure that that you're careful not to damage the
seal because the seal has a metal spring on it and that spring squeezes sealed
down to squeeze this hub of the converter so this area of the converter
is where the front seal writes and the front pump bushing so we put a little
trans jail they're to allow it to slide through
rubber to added some transmission fluid this convertible holds at least 2 quarts
and yeah I'm going to recommend installing the fluid prior to putting
the converter on the transmission you're going to put at least 2 quarts in the
converter first there are three areas on the front of the transmission you have
the the actual lockup input shaft so you have the first shaft
then you have the forward drum shaft with splines and then you have the pump
stator with splines so you have three shafts on the AL D converter on the four
7475 those units you only have two shafts so in this ALDS you have three so
they have to line up with all the splines in this converter so as you put
the converter in you want to rotate it gently clockwise applying pressure
pushing it in and you'll feel it clunk that's these splines lining up with the
splines inside the converter and the last clunk or the last part that goes in
is the actual flat land areas you notice there's two flat land areas here on the
converter that lines up with the pump gears themselves so the pump gear will
slide right over this flat land area of the input hub so that's the last part to
go in so we're gonna put this converter in and I'll show you how to measure it
to ensure it's properly installed its installed on the first spline and we're
gonna rotate it clockwise applying pressure in and as it goes in you hear a
clunk there one past the first shaft and now we're gonna rotate it onto the pump
gear okay the converter is all the way installed
and we have the drain plug Mountain located at the bottom to line up with
the flywheel you measure if you can measure in there the actual flat area of
the converter to the front part of this bell housing should be about one inch to
one and a quarter inch after this is all the way installed and you mount this up
to the engine block as you put the bell housing bolts in and you tighten them
you don't want to tighten one completely and then try pulling the
other side around that will actually snap the bell housing
so the recommend you do is you you start all the bolts and tighten them evenly so
tighten some on the passenger side and tighten the driver's side and pull it up
as you're pulling it up the studs themselves should gradually be pulling
themselves through the holes of the flywheel if it is not and the converter
is not lined up or to the flywheel and you start crushing it against the
flywheel okay that's that that's a bad situation you need to have this thing
lined up so you have to loosen the bell housing bolts and turny to the flywheel
okay rotor until it lines up properly to where the studs come through the
flywheel so this is critical on the forward applications that you line these
studs up now after this is completely tight to the engine block you should
still be able to wiggle the converter okay just still have room to wiggle even
though the holes are relatively tight in other words it's not wedge they're
jammed together okay because you actually have to tighten the nuts and as
you tighten nuts Aleksey pull the converter forward
towards the engine because when you install the converter was all the way
into the pump as far as it will go that's not the operating position the
operating position of the converter is actually pulled out over a quarter inch
if not more towards the flex plate and it's nice to call the flex plate for
reason because it flexes okay as the engine runs the converter the flex plate
will flex and actually the converter can float in and out just a little bit so
we're now going to remove the converter from the transmission and show you how
exactly the pump gear rides on the input hub of the converter so I have a pump
assembly here from meiody the actual pump stator these splines line up right
into the converter so this is the pump gears on that aod okay we're going to
take the center gear out and you notice of two flatland areas
those two flat land areas line up with the two flat land areas on the converter
nice tight fit there's no slop there if it's tight it's
very easy then when you're installing this especially on the ground he's
trying to get this in the converter can slide forward and then when you go to
tighten it up to the to the engine block instead of the gears being lined up
properly here they can actually be on top and as you tighten up the bell
housing up you're crushing this input hub of the converter into this gear okay
and you're crushing this assembly directly into the stator hub and you're
driving it into this assembly here and if you happen to tighten everything up
start the vehicle up you've just destroyed the pump assembly the pump
here and the torque inverter has all been destroyed in the note that you
broke the pumpkin or damaged them severely is that if you're able to put
fluid in the transmission more than two three quarts the pump will now pump the
fluid starve the tranny for fluid and then you're also gonna fry the
transmission trying to make it move so to make sure that the converter after
its installed on the transmission and you tighten it to the engine block that
you can still move the converter freely between the holes on the flywheel that's
mounted on the engine so that's how you install a converter on the AOD and this
is how it fits onto the pump if you have any further questions you give us a call
here at monster talk to anybody in our tech staff be more than glad to give you
a hand with any of your projects call us at one eight hundred seven oh eight
zeros or eight seven talk to you then
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