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THM 4L60-E 4L65-E “UPDATE HANDBOOK” – ATSG (Automatic Transmission Service Group)

THM

Since the introduction of the THM 4L60-E transmission in model year 1993, there have been many  major engineering design changes to improve durability and reliability. These changes have affected nearly every part used in the THM 4L60-E. This “Update Handbook” will explain each change, the parts affected by the change, and any parts interchangeability concerns created by the change.

Beginning at the start of production for model year 2001, General Motors introduced a new  transmission designated THM 4L65-E with many engineering changes. Currently this unit is found in all 2001 Cadillac Escalade and any vehicle with 6.0L engine or larger, that was previously equipped with the THM 4L60-E transmision. We will also cover the changes in the THM 4L65-E transmissionin this booklet.

CONTENTS

  • PUMP CHANGE FOR ADDED “PWM” TCC SOLENOID
  • PUMP CHANGE FOR BOLT ON BELL HOUSINGS
  • PUMP CHANGE FOR 13 VANE ROTOR AND SLIDE
  • PUMP INTERCHANGE CHART
  • 3-2 DOWNSHIFT SOLENOID CHANGE
  • SPACER PLATE IDENTIFICATION BY MODEL CODE, 1997-2003
  • NEW DESIGN SOLENOIDS
  • INTERNAL HARNESS IDENTIFICATION
  • PREMATURE LOW/REVERSE CLUTCH FAILURE
  • NEW VALVE BODY AND MANUAL VALVE FOR 1996
  • SOFT 1-2 UPSHIFT, NEW ACCUMULATOR VALVE SPRING
  • ACCUMULATOR PISTON WEAR
  • NEW DESIGN 1-2 ACCUMULATOR PISTON
  • TRANSMISSION AND/OR ENGINE OVERHEAT
  • PUSH-IN COOLER LINE FITTINGS
  • INTERMITTENT PRESSURE RISE, 1996 MODELS ONLY
  • PREMATURE 3-4 CLUTCH FAILURE, THICKER STEELS
  • HIGHER GEAR START OR LACK OF PRESSURE RISE
  • NEW DESIGN OUTPUT SPEED SENSORS
  • STAMPED STEEL, MOLDED RUBBER CLUTCH PISTONS
  • NEW “DEEP” BOTTOM PAN AND FILTERS
  • NEW DIPSTICK STOP
  • BIND IN M1, 2ND GEAR START, BIND ON 2-3 SHIFT
  • P/N SWITCH CONNECTOR CANNOT BE REMOVED
  • FORWARD SPRAG, “SKF” VERSUS BORG-WARNER
  • SEVEN CLUTCH 3-4 CLUTCH PACK FOR 2001
  • FIVE PINION CARRIERS, BOTH FRONT AND REAR
  • NEW DESIGN VALVE BODY CASTING FOR 2001
  • TROUBLE CODE P1870 AND HOW TO FIX

Language: English
Format: PDF
Pages: 120

THM 4L60-E/4L65-E “UPDATE HANDBOOK” – ATSG (Automatic Transmission Service Group) PDF free online