Speedmaster®
GM TH400 Forward Clutch and Direct Clutch Assembly w/o Clutches - Racing
Product Information
Overview
The Speedmaster forward drum and direct drum assembly are designed to withstand high horsepower with their upgraded 36 element sprag design. Speedmaster GM automatic transmission parts are manufactured using the highest-quality materials for strength and durability.
Specs
| Brand: | Speedmaster |
| Part Number: | PCE623.1018.02 |
| Part Type: | Automatic Transmission Drum |
| Number of Forward Clutches: | 9 |
| Forward Clutches Included: | No |
| Forward Clutch Friction Material: | N/A |
| Number of Clutch Plates: | 9 |
| Forward Clutch Plate Material: | Steel |
| Forward Clutch Pattern: | Round |
| Number of Direct Clutches: | 9 |
| Direct Clutches Included: | No |
| Direct Clutch Friction Material: | N/A |
| Number of Direct Clutch Plates: | 9 |
| Direct Clutch Plate Material: | Steel |
| Direct Clutch Pattern: | Round |
| Input Shaft Included: | Yes |
| Input Shaft Spline Quantity: | 30 Spline |
| Forward Clutch Piston Included: | Yes |
| Forward Clutch Piston Material: | Aluminum |
| Direct Clutch Piston Included: | Yes |
| Direct Clutch Piston Material: | Aluminum |
| Sprag Included: | Yes |
| Sprag Element: | 36 Element |
| Forward Clutch Housing Material: | Steel |
| Forward Clutch Housing Finish: | Natural |
| Direct Clutch Housing Material: | Steel |
| Direct Clutch Housing Finish: | Natural |
| Quantity: | Sold as a kit. |
| Notes: | The forward clutch assembly and direct clutch assembly do not come with friction plates. |
Warranty Information
12-Month Limited Worldwide Warranty
Prop 65 Warning
This product may contain chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm.
Installation Guide
Our AI assistant generates a step-by-step guide for this product — covering installation, maintenance, and troubleshooting.
This AI-generated guide is for general reference only and does not constitute official Speedmaster product documentation. Always verify fitment, torque specifications, and safety requirements before installation.