Drivetrain Automatic Transmissions and Components

Sun Coast Converters

Suncoast Converters Big Dog Overhaul Kit For COA-11124-180 COA-11147-180 Transmissions COA-12107E-R

$391.43

SKU: S02K COA-12107E-R

In Stock
In Stock
Ships by Jun 20
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Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Description

The Coan Racing COA‑12107E‑R “Big Dog” Overhaul Kit is a high-performance rebuild solution meticulously designed for transmissions built on Coan's 10‑clutch Super Drum platforms (such as the COA‑11124‑180 and COA‑11147‑180). This comprehensive kit includes ten aggressive “Red Eagle” direct clutch plates and six reverse clutch plates, along with steels, gaskets, and sealing rings, everything required to fully refresh the clutch system, though no bands or filter are included. The Big Dog kit offers exceptional value by combining race-grade materials and factory-precise fitment, delivering robust clutch capacity and consistent engagement for high‑torque, drag‑race, or street/strip Powerglide applications. Whether you're rebuilding a seasoned competition unit or upgrading for maximum durability, the COA‑12107E‑R brings proven performance and reliability in one powerful package.

Fitment

Fitment Guaranteed

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Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

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Specifications

BrandSun Coast Converters
Part NumberS02K COA-12107E-R

Buy with Confidence

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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