GForce G101a DogBox 4 Speed Transmission

The G-Force G101a is absolutely the end of the line in terms of absolute strength and performance from a 4 speed racing transmission. The G-Force G101A represents the pinnacle of strength and performance in a 4-speed racing transmission, engineered to handle exceptionally high power levels while delivering the precision racers expect from G-Force. Like the GF4A, the G101A features a dual-bearing center support and an integrated mid-plate, both of which contribute to outstanding case rigidity and gear alignment under extreme load. However, unlike the GF4A, the G101A does not include an internal oil pump, relying instead on its robust mechanical layout and efficient splash lubrication to keep components protected at high RPM. What truly sets the G101A apart is its sophisticated internal shifting mechanism—a single-rail, internally shifted design that offers fast, positive gear changes and exceptional driver control. This unique combination of brute strength, structural refinement, and internal shifting precision makes the G101A one of the most respected and capable 4-speed race transmissions in the industry.

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G Force G101a dog box have an output shaft that is *32 spline to handle maximum power transfer, G101a Dogbox transmission require a Hardened slip yoke for the front of your drive-shaft you are running. You can also purchase this "Hardened Slip Yoke" direct from us, the additional cost is $280.00

G101A Shifter Setback Options:

(THIS IS MEASURED FROM FACE OF TRANSMISSION BACK TO CENTER OF SHIFTER ASSEMBLY)

G Force offers you ANY shifter setback you desire
H Pattern Only 19.5" , 21.5" 23.5'' or 25.5" inches
V Gate Only 20.25'' , 22.25'', 24.25, 26'', 27''

G Force G101A CUSTOM Input Shafts:

(THESE ARE ADDITIONAL $495)

10 spline x 1.125 diameter 6.660" length Email us after placing order
10 spline x 1.375 diameter x 6.660" length DRAG RACING Email us after placing order
14 spline 2JZ x 1.125" diameter x length (LONG input *Used with Toyota V160 style Bell Housing*) Email us after placing order
18 Spline
24 spline RB/SR Email us after placing order
26 spline RX7 series
29 Spline