This is our journeyman converter that incorporates an OEM style
stator and custom modified impeller to allow low end torque
multiplication (gets the load moving) and high end efficiency
(puts the power to the road). Combined with the Sun Coast triple
clutch and billet cover it is a great converter for daily driving,
towing and or racing.
1057-3D converter established a benchmark for performance
torque converters. Often referred to as theMcRat, it has set
numerous records at the strip since it’s inception in
2005. Our #57 series incorporates a modified OEM stator and
is coupled with the “Velocity Series” impeller.
It allows good turbo spool-up with stock size turbos running
mild tunes and also offers more efficient fluid coupling than
our #56 converter. If you’re running the larger turbos
and the wild tunes and need to spool, see our #55, #58 or
#59 series converters.
addition of the 1055, 1058 and 1059 to our Allison torque
converter line we can accommodate any request in regard to
stall, torque multiplication, efficiency, or other custom
application. The stall test and RPM drops were tested with
Stage V transmission, stock turbo with a 350HP tune, stock
size tires in our 3500 dually. The example stalls and RPM
drops are strictly to help you decide which may be best for
your truck. Big tires without gear swaps will raise your brake
stall test numbers.
Suncoast orders require the year, make, and model of your truck
to be placed in the comments field upon checkout to ensure your
order is processed as soon as possible.