Ford Mustang Service Manual: Planetary Gear Support Assembly and Planetary One-Way Clutch

Transmission Description (Description and Operation)

The 4R70W has the following features:

  • Wide ratio gears
  • Four speeds
  • Rear wheel drive
  • Automatic
  • Electronic shift
  • Torque converter clutch control
  • Line pressure controls

The transmission uses Ravigneaux-style double-pinion gearset with two bands, one one-way roller clutch, one mechanical diode and four friction clutches to produce four forward gears and Reverse.

4R70W Automatic Transmission

Identification Tags


    Assembly
    Disassembly 1. Inspect the clutch cylinder thrust surfaces, piston bore and clutch plate serrations for scores or burrs. Minor scores or burrs may be removed with crocus cloth. Install a new clutch ...

    Reverse Sun Gear
    Transmission Description (Description and Operation) The 4R70W has the following features: Wide ratio gears Four speeds Rear wheel drive Automatic Electronic shift Torque conver ...

    Other materials:

    Rear Disc Brake (Description and Operation)
    Rear Disc Brake (Description and Operation) WARNING: Brake fluid contains polyglycol ethers and polyglycols. Avoid contact with eyes. Wash hands thoroughly after handling. If brake fluid contacts eyes, flush eyes with running water for 15 minutes. ...

    Starter Drive and Flywheel Ring Gear Inspection
    Starting System (Description and Operation) Starter Motor The starter motor is a 12-volt unit that has the starter solenoid mounted on the drive end housing and functions as follows: The current flows through the solenoid energizing coil until the solenoi ...

    Disassembly
    Disassembly Initial disassembly 1. Remove the differential housing cover (4033) and drain the lubricant into a suitable container. 2. Wipe the lubricant from the internal working parts and inspect the parts for wear and damage. 3. Using the special tool, m ...