SERVO SPRING RETAINER P/N REDUCE DAMAGE TO SEAL

VEHICLES AFFECTED: 1985 'C' Series Vehicle Equipped With T.H.M. 440-T4 Transmission

To reduce the possibility of damage to the reverse servo seal during assembly, a servo spring retainer has been added. This retainer is identical to the one used for the 1-2 servo spring, and the part number is 8656700. Please make note of this in your 440-T4 service manual on pages 440-T4-26 and 440-T4-67.

Starting January 16, 1984, (Julian date, 016) all 1985 AY, BA AND BS model 440-T4 transmissions were built with a new servo spring retainer (see figure 1). Refer to the chart below for model and Julian date breakpoints.

The Julian date is on the transmission identification tag located on the side of the case by the governor. Refer to figure 2 for decoding of the identification tag.

MODEL JULIAN DATE ----- ----------- AY 016 BA 016 BS 016

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.