Since the start of production in 1985, the Ford A4LD transmission has recieved many major engineering design changes. These design level changes have affected nearly every part used in the A4LD transmission. This "Update Handbook" will explain the purpose of each change, the parts that are affected by the change, and any parts interchangeability problems created by the change.

Contents: 

• Bell Housing (Engine Size) Identification
• Bell Housing Changes
• Front Seal Blow Out
• Pump Plate Differences
• Bell Housing Pump Alignment
• Pump Stator Changes
• Overdrive band Changes
• Overrun Clutch Return Springs and Retainer Destroyed
• No Movement in Overdrive Range
• Overdrive Sprag Changes
• Overdrive Center Shaft Changes
• Sun Gear, Sun Gear Shell, Direct Clutch Drum
• Forward Clutch Drum and Center Support Changes
• Front Planetary Gearset Changes
• Rear Planetary Carrier and Lube Circuit Changes
• Thrust Washer Location Charts
• Rear End Play Check Without Snap Shell
• Rear End Play Check With Snap Shell
• Checkball Locations (All Models)
• Valve Body and Spacer Plate Identification
• Manual Valve Adjustment
• Intermediate and Overdrive Servo Identification
• Cooler Line Fittings Change
• Govenor Application and Identification Charts
• Transmission Model Identification