Drivetrain› Manual Transmissions and Components

Gforce

4-Speed Racing Transmission

$7,000.00

SKU: G101a

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$100 Minimum Order
30 Days Return
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Overview

The GForce G101a is a 4-speed racing transmission designed for absolute strength and performance. This transmission utilizes a single-rail, internally shifted mechanism for fast, positive gear changes and exceptional driver control, relying on splash lubrication rather than an internal oil pump.
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The GForce G101a DogBox 4 Speed Transmission represents the pinnacle of strength and performance for racing applications. Unlike some other models, the G101A does not have an internal oil pump, utilizing efficient splash lubrication to maintain component protection at high RPMs. Its sophisticated internal shifting mechanism is a single-rail, internally shifted design, which delivers fast, positive gear changes and offers exceptional driver control. This transmission does not have synchronizers, which is typical for racing applications requiring direct engagement. The G101A boasts a 32-spline output shaft designed for maximum power transfer, and it requires a hardened slip yoke for the front of the driveshaft. G-Force offers this hardened slip yoke as a separate purchase. The G101A is available with various shifter setback options, measured from the face of the transmission to the center of the shifter assembly, including H Pattern options (19.5", 21.5", 23.5", 25.5") and V Gate options (20.25'', 22.25'', 24.25", 26'', 27''). Custom input shafts are also available for an additional cost, with options such as 10 spline, 14 spline (for Toyota V160 style Bell Housing), 18 spline, 24 spline (RB/SR), 26 spline (RX7 series), and 29 spline. Lead times for these hand-built transmissions can range from 4-8 weeks.

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

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Specifications

BrandGforce
Part NumberG101a
CategoryDrivetrain
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Returns & Fitment

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

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