THM 700-R4 “UPDATE HANDBOOK” – ATSG (Automatic Transmission Service Group)

The 1987 through 1993 THM 700-R4 transmissions were produced with many engineering design changes. These changes have affected nearly every part used in the 700-R4. This “Update Handbook” will explain each change, the reason for the change, the parts that are affected by the change and any parts interchangeability concerns created by the change. 1993 was the last year the 700-R4 transmission was produced and this manual will cover all changes up through and including the 1993 changes.

CONTENTS

1982 DESIGN CHANGES

• ROLLER CLUTCH TO A SPRAG

1984 DESIGN CHANGES

• NEW INPUT HOUSING WITH BALL CAPSULE
• NEW TURBINE SHAFTS WITH INCREASED DIAMETERS
• NEW REAR INTERNAL RING GEAR
• NEW OIL PUMP BODY AND COVER WITH ADDED DAM

1985 DESIGN CHANGES

• ADDED INNER PUMP SLIDE SPRING
• NEW REACTION CARRIER WITH OIL DAM
• NEW INPUT CARRIER WITH BAT-WING WASHERS

INFORMATION ONLY

• CALIFORNIA EXTERNAL 3RD AND 4TH CLUTCH SWITCHES

1986 DESIGN CHANGES

• NEW LOW ROLLER CLUTCH WITH LONGER ROLLERS
• NEW ACCUMULATOR PISTONS AND SEALS

1987 DESIGN CHANGES

• ELECTRONIC SPEED SENSOR
• NEW OVERRUN CLUTCH HUB
• NEW 28 ELEMENT FORWARD SPRAG
• AUXILLIARY VALVE BODY ADDED
• SPACER PLATE IDENTIFICATION 1987-1993
• 2-4 SERVO PIN SEAL RINGS AND GROOVES ELIMINATED
• BALL CAPSULE ADDED IN REVERSE PASSAGE IN CASE
• REVERSE APPLY PACKAGE
• REVERSE INPUT PISTON MODIFICATION
• NEW 3-4 CLUTCH AND STEPPED APPLY PLATE
• NEW TYPE-15 WIRING HARNESS AND TEMPERATURE SWITCH
• NEW BOTTOM SUCTION OIL FILTER AND FILTER SEAL

1988 DESIGN CHANGES

• NEW 1-2 SHIFT VALVE LINE-UP IN VALVE BODY
• LOAD RELEASE SPRINGS ADDED TO 3-4 CLUTCH PACK
• TRANSMISSION CASE MODIFICATION, L/R HUB
• NEW TYPE-18 WIRING HARNESS ELIMINATES 4-3 PULSE SWITCH
• NEW GOVERNOR GEAR WITH MORE GLASS CONTENT

1989 DESIGN CHANGES

• TCC THROTTLE VALVE LINE-UP BORE ELIMINATED IN VALVE BODY
• SHORT LIP SEALS INTRODUCED, FORWARD, REVERSE AND 3-4 CLUTCH

1990 DESIGN CHANGES

• NEW THICKER LOW ROLLER CLUTCH SUPPORT
• NEW 2-4 BAND WITH LUBE WINDOW

1991 DESIGN CHANGES

• NEW HIGH ENERGY 3-4 CLUTCH FRICTION PLATES
• NEW RUBBER LUBE SEAL, INPUT HOUSING TO OUTPUT SHAFT

1992 DESIGN CHANGES

• TV LIMIT VALVE LINE-UP IN VALVE BODY CHANGES

1993 DESIGN CHANGES

• 1-2 AND 3-4 ACCUMULATOR SPRING AND PISTON CHANGES
• NEW REVERSE INPUT HOUSING
• NEW PRESSURE REGULATOR VALVE
• NEW 3-4 CLUTCH PACK WITH THICKER STEEL PLATES

UPGRADE ENHANCEMENTS

• NEW 3-4 CLUTCH, FORWARD, OVERRUN, STAMPED STEEL PISTONS
• NEW SUN SHELL AND THRUST BEARING
• NEW SEVEN FRICTION 3-4 CLUTCH PACK
• LOAD RELEASE SPRINGS EXPLAINED
• NEW FIVE PINION FRONT AND REAR PLANETARY CARRIERS

WIRING TYPE INFORMATION

• 1982-1993 MODEL IDENTIFICATION AND WIRING TYPE I.D
• 1982-1993 WIRE SCHEMATICS BY TYPE

Language: English
Format: PDF
Pages: 120

THM 700-R4 “UPDATE HANDBOOK” – ATSG (Automatic Transmission Service Group) PDF free online