G-Force Transmissions

G-Force GF-2000 Clutchless 5 Speed Transmission
The GF-2000 transmission is used solely for clutchless applications. This transmission is ideal for, but not limited to, Pro Stock, Pro Stock Truck, Competition Eliminator, or any of the various NMCA, NMRA, or other 10.5 inch tire muscle car applications. This transmission features a more internal bearing supports than any other racing transmission on the market today. Generally, the GF-2000 is used as a 5 speed, but it can also be build as a 4 speed depending upon the desired application. The GF-2000 and the GF-5R have many of the same applications where a clutchless drag racing transmission is needed.
The most significant advantage of the GF-2000, however, is its' strength. While the GF-5R is capable of handling 1,300 or more horsepower, depending upon application, the GF-2000 can handle approximately 25-30 percent more power in the same vehicle. There is also a greater selection of ratios available for the GF-2000. While most enthusiasts do not need this extra horsepower and ratio capability, the GF-2000 makes them available for those that do. The available options for the GF-2000 include a hollow mainshaft and counter shaft, titanium shifter, and REM micropolished gears. The titanium shifter option saves approximately 3 lb. and the hollow mainshaft and countershaft saves approximately 4 lb.

The GF-2000 clutchless 5 speed is the latest development in transmission technology. Developed specifically for professional Pro Stock teams, this transmission has endured countless hours of research and development and an equally rigorous testing agenda. It has now been made available to the general racing public to further reinforce the fact that G-Force is committed to bringing the best possible products to the racer.
G-Force GF-2400 Clutchless 4 Speed Transmission
4-Speed GF2400 can handle upwards of 1900 HP with ease and requires no chassis modifications to install in the place of the previous generation GF2000s. Along with all of the internal improvements, there are also more input shaft choices and more shifter locations available.
G-Force GF5R Clutch Assisted or Clutchless 5 Speed Transmission
The GF-5R transmission has a wide range of applications. Some of these often include: drag racing (both clutchless and clutch assisted), road racing, off road, and street/strip vehicles. Like the G-101, this transmission can be used as a 4-speed if an overdrive is desired, or a 4th gear if 1:1 is not adequate. This transmission also has many custom applications which may include: dragsters or roadsters, import vehicles, salt flat vehicles, and open road racing. The possibilities for using this transmission are virtually endless.Like all of our models, this transmission comes with your choice of a Long H-Pattern or Vertical Gate shifter. An air shifter can be specified as optional for drag racing applications as well.
Other available options for this model are REM® micropolished gears, needle bearing output (with includes Mark Williams hardened yoke), and a torsion bar. The torsion bar option is essentially what it sounds like. This is a long bar that runs through a hollow countershaft. This bar is connected to the input drive set at one end and to the rear of the counter shaft at the other end via splines. The idea behind the torsion bar is that the power transfers through this bar and consequently twists it slightly, but only for an instant. This power is then transferred to the counter shaft itself (the outer tube), thus driving the vehicle forward. This twisting action helps relieve some of the impact that normally gets transferred directly to the gears. This option is mostly utilized in considerably heavy cars (generally 3,000 lb. or more) or cars with a very "stiff" clutch.

Most drag racing clutches today need only a few hundred pounds of pressure to perform well. The more the clutch pressure, the more impact that transfers to the gear teeth. The clutch technology utilized in a vehicle is largely dependent upon the type of transmission used. When using a high performance transmission such as the GF-5R, it is very important to consider these things.

The GF-5R 5 speed transmission is most definitely a high performance unit. This transmission has benefited from years of development and has proven its' worth in the realm high performance. With proven excessive horsepower handling capability and low price as compared to its' closest competitors, it is without question the best value in 5 speed racing transmission technology.
G-Force GF4A Clutch Assisted Transmission