INFO ON NEW PRODUCT INFOR FOR 4L60-E TRANS. GMC Truck Export Savana 1998

For 1990-2009 cars

# INFO ON NEW PRODUCT INFOR FOR 4L60-E TRANS

#### SUBJECT: INFORMATION ON NEW PRODUCT INFORMATION FOR 4L60-E TRANSMISSION

#### MODELS: 1998 CHEVROLET CAMARO, CORVETTE 1998 PONTIAC FIREBIRD

1998 CHEVROLET AND GMC C/K, M/L, S/T, G MODELS 1998 OLDSMOBILE BRAVADA 1998 HOLDEN COMMADORE (VS MODEL) WITH HYDRA-MATIC 4L60-E (RPO M30)

THE HYDRA-MATIC 4L60E TRANSMISSION HAS RECEIVED THE FOLLOWING REFINEMENTS FOR THE 1998 MODEL YEAR (FIGURES 1-10):

NEW CASE WITH IMPROVED DRAINBACK/TO REDUCE AERATION OF FLUID

NEW 300MM TORQUE CONVERTER (5.7L F CAR)/NEW STATOR SHAFT AND PUMP ASSEMBLY, TURBINE SHAFT + HOUSING ASSEMBLY/IMPROVES FUEL ECONOMY

ECCC (F CAR 3.8L + ALL TRUCKS) CONTINUOUS SLIP TCC FRICTION MATERIAL/IMPROVES FUEL ECONOMY AND NOISE ISOLATION

100% 2-PC. CASE CAPACITY

NEW MANUAL SHAFT CORROSION COATING FROM GOLD TO BLACK / BETTER OXIDATION PREVENTION / WILL SERVICE ALL 1993-1998 MODELS

NEW EXTENSION ASSEMBLY (F CAR ONLY)/MORE RIDGED DESIGN TO IMPROVE DURABILITY

NEW WIRING HARNESS ASSEMBLY / FULLY ENCAPSULATED DESIGN TO IMPROVE DURABILITY

NEW 1-2 ACCUMULATOR SPRING / NO PAINT / NEW MATERIAL TO IMPROVE DURABILITY

NEW SCREENS FOR PRESSURE CONTROL SOLENOID AND SPACER PLATE / REVISED FILTER SCREENS

THE FOLLOWING CHANGE WILL BE IMPLEMENTED FOR 1998 INTERIM:

PRESS FIT INPUT SUN GEAR TO FORWARD SPRAG INNER RACE / SERVICE AS ONE PIECE

THE FOLLOWING CHANGES WERE IMPLEMENTED OCTOBER 1997:

NEW TRANSMISSION FILTERS W/INCREASED DEPTH DEEP PAN- C/K, G AND HOLDEN

NEW BOTTOM PANS, DIPSTICK STOP BRACKET DEEP PAN- C/K, G AND HOLDEN REGULAR PAN -S/T, M/L, F

NEW VALVE BODY CASTING WITH CHAMFER FOR NEW DIPSTICK STOP BRACKET (MUST BE USED TOGETHER WITH DEEP PAN, FILTER AND STOP)

FIGURES: 12 ATTACHMENTS: 0

GENERAL MOTORS BULLETINS ARE INTENDED FOR USE BY PROFESSIONAL TECHNICIANS, NOT A "DO-IT-YOURSELFER". THEY ARE WRITTEN TO INFORM THOSE TECHNICIANS OF CONDITIONS THAT MAY OCCUR ON SOME VEHICLES, OR TO PROVIDE INFORMATION THAT COULD ASSIST IN THE PROPER SERVICE OF A VEHICLE. PROPERLY TRAINED TECHNICIANS HAVE THE EQUIPMENT, TOOLS, SAFETY INSTRUCTIONS AND KNOW-HOW TO DO A JOB PROPERLY AND SAFELY. IF A CONDITION IS DESCRIBED, DO NOT ASSUME THAT THE BULLETIN APPLIES TO YOUR VEHICLE, OR THAT YOUR VEHICLE WILL HAVE THAT CONDITION. SEE A GENERAL MOTORS DEALER SERVICING YOUR BRAND OF GENERAL MOTORS VEHICLE FOR INFORMATION ON WHETHER YOUR VEHICLE MAY BENEFIT FROM THE INFORMATION.

COPYRIGHT 1997. GENERAL MOTORS CORPORATION. ALL RIGHTS RESERVED.