Speedmaster GM TH400 Forward Clutch and Direct Clutch Assembly w/ Carbon Fiber Clutches PCE623.1019.01

The Speedmaster PCE623.1019.01 is a complete forward clutch and direct clutch assembly designed for the GM TH400 automatic transmission. This assembly features carbon fiber clutches that deliver reliable engagement and heat dissipation for both street and performance applications. The GM TH400 is one of the most widely used heavy-duty transmissions in automotive restoration, hot rodding, and classic vehicle builds, making this clutch assembly an essential component for rebuilding or upgrading transmission performance.

This assembly is engineered as a direct replacement for worn or damaged original equipment clutch packs. The carbon fiber construction provides superior durability compared to standard friction materials, offering extended service life and consistent torque delivery under load. The assembly arrives as a complete, ready-to-install unit, making it ideal for transmission shops, restoration specialists, and experienced DIY builders who are rebuilding a TH400 for reliability and performance. Compatibility is specific to GM TH400 transmissions, so verify your transmission model before ordering.

Key Features & Benefits

• Carbon Fiber Clutches: Enhanced durability and heat resistance compared to standard friction materials.
• Complete Assembly: Both forward and direct clutch packs supplied as a ready-to-install unit.
• TH400 Specific: Engineered to exact OEM specifications for GM TH400 automatic transmissions.
• Proven Design: Reliable engagement and torque delivery for rebuilt or upgraded transmissions.
• Speedmaster Quality: Precision manufactured performance transmission component.

Specifications

Ideal Applications

• TH400 transmission rebuild for classic cars and hot rods
• Transmission replacement for marine or industrial equipment using TH400
• Heavy-duty vehicle restoration and performance upgrades
• Transmission shop and professional rebuilder inventory