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Driftmotion

Gen2 Transmission Adapter

$200.00

SKU: SLG-TRNS3Y

Special Order
Free Shipping over $200
$100 Minimum Order
Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Overview

The Seems Legit Garage SLG - Gen2 Transmission Adapter is a lightweight adapter designed to connect BMW transmissions to a 1-piece driveshaft yoke. It is precision machined from 6061 billet aluminum for a precise fit and to eliminate vibrations. This adapter allows for the elimination of the guibo and the use of a stronger, lighter custom single-piece driveshaft.
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The Seems Legit Garage SLG - Gen2 Transmission Adapter is a lightweight, precision-machined component crafted from 6061 billet aluminum, designed to seamlessly join BMW transmissions with a 1-piece driveshaft yoke. This adapter offers a robust solution to replace the factory guibo (flex disc) with a stronger, lighter, and more durable custom single-piece driveshaft, ideal for performance applications where reliability is paramount. The adapter is meticulously engineered with exacting tolerances to ensure a vibration-free operation. It works with manual, automatic, and DCT BMW transmissions and includes all necessary hardware for installation. Weighing only 12.6 ounces, it contributes to keeping rotational mass low, and its design was dynamically balanced using software during the development phase. The adapter features tapered bolt hole flanges for a snug fit into the output flange, which helps relieve stress on the bolts. Two sizes are available to accommodate different BMW transmissions. The 'Small' version features a 105mm bolt circle and fits transmissions like the 135i/335i (N54/N55, and some Diesel versions), and B58-based 8HP transmissions. The 'Large' version has a 110mm bolt circle and is compatible with a wider range of transmissions, including those found in the E9x M3 and F8x M2/M3/M4 models. This adapter is designed to work with SPICER #3-2-119 and equivalent yokes. All hardware is included for a straightforward installation process.

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.

Fitment

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Specifications

BrandDriftmotion
Part NumberSLG-TRNS3Y
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.

Free shipping over $200 in the continental US. Alaska, Hawaii, U.S. territories (Puerto Rico, U.S. Virgin Islands, Guam, American Samoa, and the Northern Mariana Islands), and international orders carry surcharges — most appear at checkout. Some exceptions (LTL freight, or suppliers who quote freight only after we place the order) won’t. In those cases we’ll reach out with the exact charge before your order moves forward.

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