The Coan Racing COA‑12121 Gasket & Seal Kit is a complete overhaul set designed specifically for GM Powerglide transmissions. Featuring a full range of gaskets and seals, including pan gaskets, separator plate gaskets, and any necessary O‑rings, this kit provides everything required to reseal fluid passages and restore leak‑free integrity. Engineered to match or exceed OEM specifications, each component is precision-cut for reliable sealing performance, while the materials offer excellent durability and resistance to transmission fluid degradation.

Ideal for both routine rebuilds and performance-focused assemblies, the COA‑12121 kit ensures consistent operating pressure, eliminates potential leak points, and simplifies the rebuild process with a single, convenient package. It’s a cost-effective solution for maintaining or upgrading Powerglide units with professional grade sealing reliability.