Speedmaster®
GM Turbo 400 TH400 Output Shaft, Yoke, and Tail Housing Kit - 40 Spline
Product Information
Overview
These Speedmaster tailshaft housings are designed to fit the stock Turbo 400 transmissions. They are five times stronger and more ridged than stock because they are made from aircraft grade aluminum alloy. Featuring thicker walls and more gusseting than any other manufacturer.
Specs
| Brand: | Speedmaster |
| Part Number: | PCE598.1009 |
| Part Type: | Automatic Transmission Tailhousing |
| Yoke Included: | Yes |
| Yoke Inner Spline Quantity: | 40 Spline |
| Yoke Overall Length (in.): | 6.50 in. |
| Universal Joint Style: | 1350 Series |
| U-Joint Cap Diameter (in.): | 1.188 in. |
| Center of U-Joint to End of Slip (in.): | 5.500 in. |
| Slip Diameter (in.): | 2.300 in. |
| Tailhousing Included: | Yes |
| Tailhousing Roller Bearing Included: | Yes |
| Tailhousing Seal Included: | Yes |
| Tailhousing Material: | Aluminum |
| Tailhousing Finish: | Natural |
| Output Shaft Included: | Yes |
| Output Shaft Spline Quantity: | 40 Spline |
| Output Shaft Length (in.): | 9.250 in. |
| Output Shaft Material: | 4340 Steel |
| Hardware Included: | No |
| Supports Speedometer: | No |
| Supports Governor: | No |
| Quantity: | Sold as a kit. |
| Notes: | Designed for 40 spline applications. |
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.