features include the following:
- SunCoast custom billet second gear band lined with Carbon
- SunCoast billet band strut
- SunCoast billet band anchor
- SunCoast custom billet direct piston
- SunCoast custom billet forward piston
- SunCoast billet 4 ring accumulator piston
- SunCoast Billet upgraded governor solenoid
- SuncCoast custom Billet intermediate band servo
- Multiple input shaft options (some require custom torque
- 6 Raybestos custom frictions and 6 Kolene steels in direct
- 4 Raybestos custom frictions and 3 Kolene steels in forward
- 10 Raybestos custom frictions and 9 Kolene steels in Overdrive
- 6 Raybestos custom frictons and 6 Kolene steels with custom
- SunCoast custom calibrated valve body
- New bushings
- New torrington thrust bearings
- New thrust washers
- All new upgraded electronics
- SunCoast custom calibrated pump
two decades SunCoast has continually led the the industry
in both innovation and performance. Dating back to the days
of Redneck nationals and Team Green before outlaw racing was
even thought of SunCoast transmissions were breaking records
and winning world championships. The phrase "copied but
never caught" could never be truer than now.
one of our Dodge Torqueflite transmissions receive what we
call our base packages. This base package can be built and
improved upon with a plethora of options and upgrades to suit
your individual needs. These units are not "cookie cutter"
units but rather something individually catered to your specific
needs. Each one of our calibrations to the valve body, pump,
seperator plate, and even the clutch stack-ups are meant with
your intended usage in mind. These units include have many
upgrades from the factory not just for performance but restoring
hydraulic integrity to some very crucial circuts, Here are
some listen below:
Billet Band Package
transmission utilizes a band to shift the transmission into
2nd gear, then this band is release when shifting into 3rd
gear. This band is wraps around the direct drum (right behind
the transmission pump)this drum house the direct clutches
(3rd gear). When thinking about the amount of torque these
trucks can make coupled with the torque multiplication of
the converter and it soon becomes apparent why this area could
be problematic. The band itself from the factory is a very
flexible band, these band will stretch and require constant
adjustment. When even modest attempts of increased apply pressure
occur these band break due to the flimsy construction. You
will some aftermarket attempt to use a very rigid material
to keep these from flexing or breaking. SunCoast took a different
approach and just redesigned the band all together. Each one
of our units recieves a new SunCoast custom billet band machined
in house. This new SunCoast billet band is also lined with
a Carbon Fiber friction material offering the best friction
focus is with the hydraulic integrity of this band acuation.
The best band in the world is useless without proper clamping
force when apply and a quick release off the drum when needed.
This is where our SunCoast billet 2nd gear servo comes into
play. The factory uses a cast servo, the servo offers two
simple o'rings to help control cross-leaking within the bore.
This bore over time will wear, as it wears cross leaking occurs
causing lazy shifts, slips going into 2nd gear, and of course
in some events bind-ups and dragging of the band going into
3rd. SunCoast corrects this by installing a custom cnc'd billet
intermediate servo. This servo is made with 4 sealing rings
both teflon and rubber, That is double what the factory uses.
This servo is also larger in apply area, over 20% larger than
the factory. This larger apply surface area allows for not
only a dramatic increase in apply pressure giving you an enormous
amount of clamping load, but this also allows for a faster
shift time. As almost everyone in our industry lust over the
additional clamping force and much quicker apply time, we
often overlook the release of the band. The release of the
band can be just as import if not more. When they drag on
release it can cause bind-up issues, scoring of the band material,
and of course premature wear. SunCoast also modifies the length
of this servo to achieve much crisper shifting.
we have increased the clamping force we must address the two
other problematic issues with the band strut and the band
anchor. Just as an engine builder would change to a stronger
chrome moly push rod when changing the camshaft to ensure
no deflection occurs the same can be said for the band strut
and band anchor. With now having a more apply pressure on
the band we must correct or issue with the factory band strut
as well. SunCoast replace the factory band strut with a much
stronger billet band strut to keep any deflection at bay.
The band anchor is also replaced with a billet one as well.
out the garbage
through all of the engineering they have done somehow thought
it would be a good idea to put a plastic accumalator piston
in this unit. We are still left scratching our head everytime
we see a broken one. These very inexpensive plastic pistons
will in fact break over time. This is not a matter of if but
when this will happen. When you couple this with the fact
that this piston also has issues with cross leaking within
the bore, It only make sense that it belongs in the trash.
Here at SunCoast we manufacture our own new piston that has
additional sealing rings to fix this issue. This accumalator
piston is also designed with annular grooves to keep side
loading from transpiring.
can occur in many ways, in engineering deflection is the degree
to which a structural element is displaced under a load. When
we start talking about loads under hydraulic apply priciples
and deflection is always around us.
the direct and forward drum we see deflection and side loading
contribute to repeated failures daily. At SunCoast we have
addressed the issue with the direct drum by making several
improvements. The factory cast piston has several key issues
we felt we needed to address. On every one of our Competition
transmissions we simply replace the factory direct drum with
a full billet one. While this is very costly we felt it neccassary
despite the cost. This upgrade is not needed for mildly modded
vehicles and we can resolve the key issues by simply replacing
the factory piston. Here they key issues with this piston
and how we address it:
- The factory piston over time will wear in the inner diameter
allowing it to wear and even cause side-loading. this uneven
wear and side-loading can further aid the deflection occurring
with the higher line pressure from say a shift kit. This is
alleviated by simply changing the material that is much more
resistant to wear.
- in attempts to achieve greater clamping force most builders
will modify the seperator plate and valve body to achieve
both more volume and line pressure. The only issue is the
factory "cast" piston was not designed for this.
The modest attempts by the builder is now causing deflection
and uneven apply. We correct this issue using a custom SunCoast
cnc'd direct piston that will not deflect under the most extreme
- when SunCoast sat down to design our new billet direct piston
we knew we wanted to address the apply surface area, so we
did just that. The new SunCoast billet direct piston has a
larger than factory apply area. This along with the fact it
is billet allows us to achieve the greatest undeflected apply
pressures in the industry.
- SunCoast has specifically designed these apply pistons in
both the forward and direct drums to a custom design allowing
our own propriertary custom clutch and steel stack-ups. We
manufacture each billet piston for both the direct and forward
piston with exact tolerences in mind.
- The SunCoast custom redesigned billet direct piston also
comes with our own custom spring count with a set of custom
return springs. This was an important issue we wanted to address
in the direct clutch, after all the release is just as valuable
as the apply.
one of our builds receives new custom billet direct and forward
apply pistons. We are proud say that both the forward and
direct pistons are designed, engineered, tested, and manufactured
here in the U.S.A. by American workers.
way the valve body is the brain of the transmission. This
one simple piece can simply be the life or death of a transmission.
Each one of our SunCoast custom built transmission's receive
one of our custom calibrated valve bodies. SunCoast has specifically
calibrates each valve body for that customers specific needs.
We also offer a variety of additional upgrades to these as
well. We offer full manual setup's in both forward and reverse
shift patterns. These can also be built with custom transbrake's
TORQUE CONVERTER SOLD SEPERATELY.