For 1990-2009 cars

# SHUDDER IN REVERSE 700R4 TRANSMISSION

A 1982 THROUGH 1986 THM 700-R4 TRANSMISSION MAY EXHIBIT A SHUDDER CONDITION THAT IS MOST NOTICEABLE WITH A MEDIUM TO HEAVY THROTTLE APPLY AFTER REVERSE GEAR HAS BEEN SELECTED. STARTING ON JULY 9, 1985, OR JULIAN DATE 190 THROUGH OCTOBER 2, 1985, OR JULIAN DATE 275 (REFER TO FIGURE 1), ALL 1986 THM 700-R4 TRANSMISSION MODELS WERE BUILT USING A NEW SPACER TO CORRECT THIS REVERSE SHUDDER CONDITION. INSTALL THIS NEW SPACER ON ANY 1982 THROUGH 1985 OR BEFORE BREAKPOINT 1986 THM 700-R4 TRANSMISSION THAT EXHIBITS THE REVERSE SHUDDER CONDITION. THE CHART ON PAGE #2 INDICATES NEW SPACER PLATE PART NUMBERS, CODE IDENTIFICATIONS, 1986 PRODUCTION JULIAN DATES AND 1982 THROUGH 1986 TRANSMISSION MODEL APPLICATIONS FOR THE NEW SPACER PLATES. REFER TO THE APPROPRIATE SERVICE MANUAL FOR THE LOCATION OF SPACER PLATE IDENTIFYING LETTER CODES AND PROPER REMOVAL AND INSTALLATION PROCEDURES. SPACER PLATE LETTER CODE *1986 MODEL PART NUMBER IDENTIFICATION JULIAN DATE TRANS. MODEL AND YEAR *1986 8654481 R 198 1986 - 6FAM, 6FJM, 6MAM 6MFM, 6MMM, 6MRM

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.