hello everyone and welcome in this video
we're going to be talking about five
things which you shouldn't do in a dual
clutch transmission vehicle now if
you've watched my video on the things
you shouldn't do in a manual or an
automatic transmission a lot of you guys
were asking you know which of these
apply to a dual clutch transmission so
that's what we'll be clarifying in this
video and we are in the 2016 Hyundai
Tucson which has a 7-speed dry dual
clutch transmission so the first one
we're going to get into is if you're
driving along and you come to a stop
some of you guys were asking should I
put the vehicle in neutral because
you've got a clutch there and in this
case it is a dry clutch and so you're
going to be squeezing up against that
clutch your engine's going to be trying
to rotate it but the clutch can't rotate
because it's connected to your wheels
and so you're going to have wear on that
clutch so should you be putting it in
neutral well the engineers who develop
these cars are smart enough to realize
that problem so what they'll do is as
you're coming to a stop at a certain
speed and with a certain amount of brake
pressure they'll automatically disengage
both clutches so your transmissions
effectively in neutral and as a result
of this and you're not going to have any
wear on your clutch so if you do come to
a stop you can just leave it in Drive
the computer takes care of it you don't
have to put it in neutral and you won't
have any wear on your clutch moving on
to number two if you come to a stop on
an incline you shouldn't take your foot
off the brake and in a lot of cases with
an automatic transmission this can be
okay to do because if you let your foot
off the brake the torque converter is
sitting there spinning anyways and it
has enough torque to just hold the
vehicle stationary in place well in a
dual clutch transmission vehicle you're
using that clutch pack which is going to
be slipping and so you're going to be
putting unnecessary heat into the clutch
pack where you know when your foots on
the brake it's going to disengage that
clutch pack and your brakes will hold
the vehicle rather than that clutch pack
and absorbing all that unnecessary heat
and causing unnecessary wear now there's
a difference to in clutches for example
this has a dry clutch versus you could
have a wet clutch and you can also have
single plate versus multi-plate clutches
so multi plate and wet clutches they
tend to be able to absorb a bit more
heat and then you know a single plate or
a dry clutch and they don't necessarily
have to be in that combination but a dry
clutch tends to be a bit more efficient
it's going to Rob less power and they're
also going to tend to weigh less and so
from that standpoint you
they can be used in both eco cars such
as the vehicle we're in you know trying
to get that efficiency but it can also
be used in sporty cars because they
don't rob power and they weigh less and
so you know there are benefits to a dry
clutch over a wet clutch but a wet
clutch does tend to be able to absorb a
bit more heat without as much wear and
so you know of course they're all
designed for their specific scenarios so
this is an eco car you're not going to
be driving it super aggressively and so
they take that into mind but they also
you know obviously build it so that's
robust enough for whatever you know
scenarios you could be putting it
through now the third thing I want to
talk about is try not to spend too much
time just inching forward so you've got
your foot on the brake and you're just
slowly creeping forward and in this case
you're not going to be able to fully
engage that first gear clutch and
because of that you're going to have
more wear now this is especially true if
you are towing or if you're going up a
steep incline we're going to have more
resistance to that and so in these
scenarios or if it's just hotter outside
and these scenarios you know you want to
try minimize the time that you spend
inching forward because it's trying to
engage that clutch but you don't have
enough speed where it can fully engage
it so it has to allow for some slip now
these clutches are of course made for
wear and tear so it's not like you know
it can't do it it certainly can but if
you're looking for the maximum longevity
of the clutch then you want to try and
minimize the amount of time you spend
inching let a gap form in front of you
and then you know let yourself move up
and let the clutch fully engage and so
that way you're not going to have that
slip in there and cause any heat to
build up within the clutch pack now the
next one we're going to get into deals
with the logic of the transmission so
you shouldn't downshift
while on the accelerator pedal and you
shouldn't up shift while on the brakes
and it's not that this is going to cause
any harm but you should understand the
logic behind this of why there's going
to be a delay because you might get
frustrated with your vehicle if you were
to do this because it takes a little bit
longer for it to shift so a dual clutch
transmission has at minimum two
different transmission shafts and one of
those chefs is going to have the even
gears and the other is going to have the
odd gears and so what that allows it to
do with those two clutches is to
pre-select one of the gears let's say
you're in first it can pre-select second
and then all it has to do is disengage
the first clutch and then engage the
second clutch and in doing that you're
already in second gear so the gear
shift only requires a change of
disengaging and re-engaging a clutch
rather than actually shifting that cog
for second gear and so as a result of
that they're very fast but they have to
be able to predict which ear you're
going into next and so that all depends
on the logic of the ECU and how it's set
up now but for example a very basic
example is that if you're on the brakes
you're slowing down so that likely means
your next step is going to be to
downshift versus if you're on the
accelerator pedal you're speeding up and
that likely means your next operation is
going to be to upshift and so in these
scenarios it'll tend to you know pre
select the gear that it thinks you're
going to use next and so let's say
you're on the highway you know you're in
fourth gear and someone cuts you off and
you were about to shift into fifth
because you're at a high enough speed
well you hit on the brakes because
someone cuts you off and then you shift
a fifth it may think that because you
just sit on the brakes you're probably
going to downshift and so depending on
that scenario it may take longer for it
to shift into fifth gear another example
you know coming up to a stoplight it
could be where you're on the brakes and
so it's disengaged the clutches
altogether and then the stop light turns
green while you're still rolling up to
it so you get on the gas and then you
experience a delay
well that delay could be because it
thought okay you're coming to a complete
stop I can disengage all the clutches
but then the light turns green and so
now you can go and so it's kind of
critical to understand how a dual clutch
transmission works in order to not get
frustrated in these situations where it
may not behave the way you want it to
and it may not behave like a traditional
automatic gearbox and this brings us to
our final point which is about launching
your dual clutch transmission vehicle
now obviously you can cause damage by
launching your car and it's not
something you should typically be doing
but if you want to do it in a dual
clutch transmission vehicle you're going
to put your left foot on the brake
hold that firmly and you're going to
press the gas and the critical thing
here is to just not hold that very long
you want to let go of the brake fairly
quickly because you're dumping all of
that heat into your clutch if it's
starting to engage to try and power the
vehicle now I asked Hyundai what happens
in their vehicles when you put your foot
on both the brake and the accelerator
pedal in their dual clutch transmission
vehicles and they said the engine speed
should rise and the clutch should go to
a standby position the clutch may try to
engage and if it identifies no vehicle
movement it should reduce the engine
speed
hold that speed until the accelerator
pedal is released so in the scenario of
launching your vehicle Hyundai tries to
make sure that you can't damage it by
disengaging that clutch and dropping the
engine rpm if you hold it for too long
but regardless you shouldn't hold the
brake and the gas too long so we'll go
ahead and test that out rise this up a
little bit
foot off the brake slow acceleration
initially and then it fully engages
and there's 60 so thank you guys for
watching and if you have any questions
or comments feel free to leave them
below just as important as to
understanding you know what you
shouldn't be doing is understanding why
so I brought some parts along this is
part of a torque converter and so we're
going to be looking at you know kind of
how mechanically automatic transmission
works so that we can better understand
why we shouldn't do certain things in
them which i think is just as important
as understanding what you shouldn't be
doing