Speedmaster®
Ford C4 Automatic Transmission 0.839" 26 / 24 Spline Billet Steel 300M Input Shaft
Product Information
Overview
These Performance Automatic hardened input shafts are custom-forged from 9310 non-twist steel. Quality, performance and great value make these hardened input shafts an essential component for anyone looking to raise their transmission to the next level.
Specs
| Brand: | Speedmaster |
| Part Number: | PCE602.1001 |
| Part Type: | Automatic Transmission Input Shaft |
| Input Shaft Material: | 9310forged steel |
| Quantity: | Sold individually. |
| Notes: | Fits 26-spline input. This is the most popular shaft that was produced for most of the late C4 & C5 351W 351C |
Description
The early model C4 (1964–1969) used a .788-inch 24-spline input shaft, which was upgraded in 1970 to 26-spline and .839-inch. The upgrade also included a matching clutch hub of 26-spline. In 1971, Ford went to a .839-inch 26/24-spline input shaft, meaning the torque-converter side is 26-spline and the clutch hub is 24-spline.
Models:
PCE602.1003 - 24/24 spline 0.788-inch : 1964–1969 C4, C5, C6, C7, C8, C9
PCE602.1002 - 26/26 spline 0.839-inch : 1970–1970 D0
PCE602.1001 - 26/24 spline 0.839-inch : 1971–1979 D1, D2, D3, D4, D5, D6, D7, D8, D9
PCE602.1008 - Early to Late Converter: 26 spline 0.839-inch to 24 spline 0.788-inch
Models:
PCE602.1003 - 24/24 spline 0.788-inch : 1964–1969 C4, C5, C6, C7, C8, C9
PCE602.1002 - 26/26 spline 0.839-inch : 1970–1970 D0
PCE602.1001 - 26/24 spline 0.839-inch : 1971–1979 D1, D2, D3, D4, D5, D6, D7, D8, D9
PCE602.1008 - Early to Late Converter: 26 spline 0.839-inch to 24 spline 0.788-inch
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.