Lock Up Torque Converter - Summit Racing Quick Flicks

Summit Racing Quick Flicks discusses lock-up torque converters. This video covers the differences between lock-up and non lock-up torque converters, the anatomy of lock-up torque converters, and the advantages of using a lock-up converter. Please check out of first video on torque converters for more information:
https://www.youtube.com/watch?v=j5JFM...
To check out Summit Racing's Lock-Up Torque Converters, click here:
http://www.summitracing.com/redirect?...

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Closed Caption:

Welcome back I’m make and you better buckle
up were going to talk about lock up torque
converters today.
On this installment of quick flicks were going
to address a question that we had in our previous
torque converter video. And the question was
and the question was what about lock up converters.
I think a lock up converter in comparison
to a standard converter is a little mysterious
in the fact that it does operate a little
differently than the standard torque converter
does. For most of us that have been building
muscle cars or street rods for the most part
if we were using an automatic transmission
we were using the standard three speed automatic
in a lot of these applications. Most three
speed automatics use a standard non lock up
converter. This means that you are going to
have a percentage of loss throughout the drivetrain
throughout that converter because that converter
does not have a lock up device in it and that
has always been the downfall to having an
automatic transmission, in any vehicle is
the fact that you have somewhere between a
five to ten percentage drivetrain loss of
power throughout that assembly. Whereas in
comparison if you go with a transmission that
goes with a lock up converter in it you get
that full transfer of power once the lock
up piston engages inside that converter. This
is becoming more and more relevant in builds
today because more and more people are building
vehicles for not just performance but for
fuel mileage as well so they can go ahead
and use more aggressive gearing on the street
and they need that extra overdrive gear set
in that transmission. We are seeing this mostly
in the automatic overdrive world where those
transmissions require a lock up converter
to operate correctly. What’s happening with
a lock up converter is once that transmission
senses a certain mile per hour or a certain
RPM it’s going to go ahead and engage a
lock up piston that’s actually going to
be on the back side of the converter against
the turbine assembly. You’ll notice that
on the input shaft assembly on that automatic
overdrive transmission you will not have the
standard two shafts that you have seen there
is actually going to be a third shaft that
is really small that is going to be the engagement
unit for that piston assembly inside that
converter. The benefits to this for the most
part these days is that you have the ability
to have a vehicle that is maybe aggressive
on the street but has some race car manors
at the same time and what is does for you
is once it reaches a certain speed it locks
that piston up and now you get better fuel
mileage and at the same time the vehicle doesn’t
seem like it has as aggressive gearing in
it and things of that nature. As seen in this
image you will notice that a lock up converter
looks very similar to that of a regular non
lock up converter it still maintains the standard
impeller, turbine and stator assembly but
its also going to add a lock up piston device
to go ahead and put it into lock up mode when
necessary. Hopefully this video will clear
up any questions you had about how lock up
torque converters operate. Feel free to leave
comments or questions
in any of these videos see ya soon.