NHRA Approved for Hot Rod & Pro FWD
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G-Force is happy to introduce our latest and possibly most revolutionary clutchless transmission to date.
Not since the launch of our GF-2000 has any new transmission been so anticipated. Combining proven
technology from our past and totally new design strategies for the future, G-Force has once again
raised the bar in terms of transmission design and manufacturing. The G-Force GT-50 clutchless
5-speed transaxle is the new standard for front wheel drive drag racing transmissions.
Available in either manual or air-shifted designs, this transmission is not just a revamped rear drive
unit reconfigured for front wheel drive installation. It is a "clean sheet" design that was done for the
sole purpose of revolutionizing sport compact drag racing. The GT-50 is not like an ordinary transaxle
in nearly any terms.
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This transmission has some very unique features that are very racer friendly.
Some of these features are a fully clutchless design, a totally new modular case, an interchangeable
bolt-on bellhousing, and optional remote mounting. This transmission also has a "quick change" gear
set that is easily accessible inside the rear cover plate for extremely quick final drive ratio adjustments.
The GT-50 will work with any engine combination, including reverse rotation Hondas.
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The GT-50 can be mounted in virtually any position without worrying about cumbersome shift linkage limitations.
This is because the air shifter operates with just a few airlines running through the firewall. The air shifted
design allows the driver to keep both of his or her hands on the steering wheel at all times due to the fact that
the shift button is quite small and can be mounted on the steering wheel, if desired. This equates to a much
higher level of driver safety. The GT-50 can be mounted like a standard transaxle or it can be remote mounted
from the engine (similar to an automatic transmission). This allows for a deeper, SFI approved bellhousing and
the use of a standard "slipper" clutch, similar to the ones found in Pro Stock.
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While nearly all other transaxles are limited to relatively tall final drive ratios, the GT-50 is available with more gear ratio than most will ever need. This is because of its very unique triple reduction design. This allows for gear reduction previously thought impossible for such a small transmission.
Because the GT-50 is a clutchless transmission, it requires a separate slider for each gear. This was accomplished through the use of five unique slider and gear designs. This necessitated the design of five different shift forks and shift rail configurations. At this point, all of these different pieces were then packaged very neatly into one shift block. While this made engineering the GT-50 slightly more difficult, it allows the user to access nearly all of the internal parts very easily. To completely tear down and re-ratio the GT-50 requires only a fraction of the time normally associated with the same procedure in "other" brands.
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The GT-50 solves one of the most common problems for today's front wheel drive drag racers in terms of applying the power evenly to the pavement. Where most, if not all of the other transaxles on the market were designed primarily for road, off-road, or rally racing, the GT-50 was designed primarily for drag racing. Because of this, the GT-50 uses a spool instead of a conventional differential setup. A spool is much stronger and much more able to deal with the loads imparted on it in a drag race application. Our spool is available in either a standard 31 spline or a huge 35 spline, depending on the axles that you are planning on running. Because axle needs vary greatly from car to car, we highly recommend the use of aftermarket axles made by a leading supplier familiar with these types of components.
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From the start, the GT-50 was designed with big power handling in mind. While determining a horsepower and torque rating for a particular transmission is very difficult, we feel that the GT-50 is more than capable of handling approximately 1100 horsepower in most front wheel drive applications. This rating will vary widely depending upon the application, but in our experience this is a good estimate based on a typical Pro Front Wheel Drive application. Following our belief that strength is paramount, we made every gear in the transmission as wide as possible, and even included an exclusive steel center bearing support, all while maintaining the shortest possible case. The GT-50 utilizes heavy-duty roller bearings wherever possible to further ensure prolonged transmission life. We also have a super-alloy drive gear option for the ultimate in strength.
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