SERVICE MANUAL UPDATE 1-2 & 3-4 ACCUMULATOR-REISSUE

Model and Year: 1989 B, F, Y CARS WITH 700-R4 TRANSMISSION 1989 C, K, R, V, S, T, M, G TRUCKS WITH 700-R4 TRANSMISSION

TO: ALL CHEVROLET DEALERS

This bulletin covers revised 1-2 and 3-4 accumulator spring chart. The new chart is applicable to all 1989 THM 700-R4 HYDRA-MATIC 4L60 transmissions.

SERVICE MANUAL REFERENCE:

This information is updated for 1989 Service Manuals printed prior to December 1988. Use the following chart to update your 1989 THM 700-R4 Unit Repair Service Manual Section, page 700-R4-46 Figure 111.

1989 1-2 ACCUMULATOR 3-4 ACCUMULATOR MODELS SPRING COLOR SPRING COLOR ------ ------------ ------------ MHM, MPM, MWM, MZM, PAM, ORANGE VIOLET PBM,PCM,TNM,TUM,TXM (LT. GREEN OPT.)

FMM, MAM, MFM, MRM, MXM ORANGE DK. GREEN (LT. GREEN OPT.) MDM,MKM,MLM,TJM,TKM,YPM ORANGE RED LT. GREEN OPT.) FKM,FXM,YDM,YMM,YUM YELLOW YELLOW

MCM, PRM YELLOW RED

THM, TLM DK. GREEN LT.BLUE

YTM, YZM YELLOW VIOLET

HBM DK. GREEN YELLOW

HDM DK. GREEN RED

YNM DK. GREEN ORANGE (LT. GREEN OPT) YXM DK. GREEN RED

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.