A/T - Delayed Neutral to Reverse Engagement
89Oldsmobile10SUBJECT: DELAYED NEUTRAL TO REVERSE ENGAGEMENT 1988-89 MODELS AND REVISED SPACER PLATES 1981-89 MODELS
MODELS/YEARS: 1981-88 CUTLASS SUPREME, 1981-89 CUSTOM
CRUISER, 1981-85 EIGHTY-EIGHT, 1981-84 NINETYEIGHT WITH 2004R TRANSMISSION (RPO - MW9)
NUMBER: 89-T-126
CORP. REF. NO: 977138 977139
DATE: September 1989
SECTION: 7A
Figure 1 - Spacer Plate Identification Location:
This bulletin contains information on design changes incorporated into 2004R transmission valve body spacer plates. The Lo/Reverse orifice in the spacer plate has been enlarged to enhance Neutral to Reverse engagement performance of 1988-89 models (See Figure 1).
The revised spacer plates also include a new I.D. location. Previous spacer plates could not be identified while assembled in the transmission because the identification letters were obscured by the valve body. A tab has been added at a different location (shown in Figure 1) and the identification letters are now visible after assembly.
Figure 2 - THM 200-4R Transmission Identification Information:
DATE OF PRODUCTION CHANGE: (Figure 2)
All THM 200-4R models built after July 7, 1989 (Julian Date 188), were built using the revised spacer plate.
SERVICE PARTS INFORMATION:
All past model spacer plates for service will include the new identification tab when current stock is used up.
The Lo/Reverse feed hole revision only affects THM 200-4R transmission models that were initially built with the Accumulated Neutral to Reverse Garage Shift Package (reference Dealer Technical Bulletin 88-T- 145). Part numbers for reversed 1988-89 spacer plates are listed below.
Part numbers and identification letters have not changed. Therefore, when servicing a THM 200-4R spacer plate, order the usual part number and the replacement part will be the updated spacer plate.
Part Number Description Transmission Models
8669060 Spacer Plate (ID: CH) 8KTF, 9KJF, 9KTF
Parts are currently available from GMSPO.
SERVICE MANUAL REFERENCE:
Refer to the Unit Repair section of the THM 200-4R service manual for spacer plate removal and installation.
WARRANTY INFORMATION:
Labor Operation Number: K6560