1996 Bronco/F-Series Contents/Index
Group 07: TRANSMISSION

Section 07-01C:
Transmission, Automatic, 4R70W

DESCRIPTION AND OPERATION

Transmission Description

Identification Tag

Transmission, Disassembled Views

Bushings, Bearings and Thrust Washers Locator

Seals, Ring and Gaskets Locator

Transmission Range Selection

Transmission Shift Patterns

Upshifts

Downshifts

Coastdown

Torque Demand

Kickdown

Transmission Control Switch (TCS) and Lamp Operation

Main Components and Functions

Torque Converter

Geartrain

Apply Components

Hydraulic System

Transmission Electronic Control System

Electronic System Description

DIAGNOSIS AND TESTING

Diagnostic Strategy

Preliminary Inspection

Diagnostics

Diagnostic Flow Chart

Preliminary Inspection

Know/Understand the Concern

Verification of Condition

Road Testing Vehicle

Visual Inspection

Check TSBs and OASIS

Perform On-Board Diagnostics

Diagnostics

On-Board Diagnostics with NGS

Quick Test 1.0 — Visual Inspection

Quick Test 2.0 — Setup

Quick Test 3.0 — Key On, Engine Off (KOEO)

Quick Test 4.0 — Continuous Memory Codes

Quick Test 5.0 — Key On, Engine Running (KOER)

Special Test Modes

PCM Reset Mode (Clearing DTCs)

Clearing DTC No. P1000

OBDII Drive Cycle

Transmission Drive Cycle Test

After On-Board Diagnostics

Before Pinpoint Tests

Diagnostic Trouble Code Charts

Rotunda Transmission Tester

Illustrations

Overlays and Adapters

Tester Jacks

LEDs and Controls

Instructions

Static Testing — Engine Off

Dynamic Testing — Engine On

Disconnecting the Tester

Pinpoint Tests

Special Testing Procedures

Engine Idle Speed Check

Line Pressure Test

Stall Speed Test

Air Pressure Tests

Direct Clutch Pressure Test

Shift Linkage Check

Leakage Inspection

External Sealing

Fluid Leakage in Torque Converter Area

Leak Check Test

Leak Check Test with Black Light

Transmission Fluid Cooler

Transmission Fluid Cooler Flow Test

Transmission Fluid Cooler — Backflushing/Cleaning

Diagnosis by Symptom

Diagnosis by Symptom Chart Directions

Diagnosis by Symptom Index

Diagnostic Routines

IN-VEHICLE SERVICE

Transmission Fluid Drain and Refill

Shift Linkage Check

Main Control Valve Body

Removal

Installation

Extension Housing Seal, Gasket and Bushing

Removal

Installation

Electronic Pressure Control (EPC) Solenoid

Removal

Installation

Main Control Components

Removal

Installation

Manual Control Lever Shaft Seal

Removal

Installation

Fluid Cooler Lines

Transmission Range Sensor

Fluid Pan, Gasket and Filter

Solenoid Service

REMOVAL

Transmission

DISASSEMBLY

Transmission

Disassembly/Reassembly of Subassemblies

Main Control Valve Body

Pump and Intermediate Clutch Piston

Intermediate Clutch Cylinder

Reverse Clutch

Forward Clutch Cylinder

Planetary Gear Support Assembly and Planetary One-Way Clutch

Reverse Clutch Sun Gear Assembly

Output Shaft and Direct Clutch Cylinder

Direct Clutch Cylinder

Torque Converter Checks

ASSEMBLY

Transmission

INSTALLATION

Transmission

CLEANING AND INSPECTION

Transmission

Main Control Valve Body

Converter and Fluid Cooler

Transmission Cooler and Lines, Backflushing and Cleaning

Forward, Direct, Intermediate and Reverse Clutches

One-Way Clutch

Output Shaft

Electrical Connectors

Case

Planet Assemblies

Thrust Bearings

Transmission Fluid Cooler Tube Leakage

SPECIFICATIONS

SPECIFICATIONS

SPECIAL SERVICE TOOLS/EQUIPMENT

SPECIAL SERVICE TOOLS/EQUIPMENT