Speedmaster®
GM Turbo 400 TH400 Billet Aluminum Intermediate Clutch Blocker Eliminator Plate
Product Information
Overview
Convert your GM Turbo 400 into a 2 speed by using the Speedmaster billet aluminum intermediate clutch pack insert.
Specs
| Brand: | Speedmaster |
| Part Number: | PCE676.1007 |
| Part Type: | Automatic Transmission Rebuild Components |
| Blocker Material: | Aluminum |
| Spline Quantity: | 64 Spline |
| Quantity: | Sold Individually |
| Notes: | For use on a 36 element spray off of a 4T80E transmission. Converts TH400 into a 2-speed. Modification maybe needed on direct drum and valve body. |
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.