BULLETIN COVERS: (Figure 1) ---------------- Revised 1-2 and 3-4 Accumulator Spring Chart. The new chart is applicable to all 1990 THM 4L60 (700R4) HYDRA-MATIC transmissions.
Use the following chart to update your 1990 HYDRA-MATIC 4L60 Unit Repair Service Manual Section, page 4L60-50, figure 110.
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.