A/T - Updated Filter and Seal

87chevy29
GMC NUMBER: 88-T-53

GROUP: 7A - Automatic Transmission

DATE: November, 1987

CORPORATE
NUMBER: 867107
SUBJECT: SERVICE AND PARTS INFORMATION ON A NEW TRANSMISSION FLUID FILTER AND FILTER SEAL

MODELS: 1982 - 1987 LIGHT DUTY MODELS AND 1988 C/K TRUCKS EQUIPPED WITH THM 700-R4 AUTOMATIC TRANSMISSIONS
BULLETIN COVERS:

A new design THM 700-R4 transmission fluid filter and filter seal. The new design transmission filter is a wider filter that has a felt element in place of the screen element and a shorter filter neck. The filter also has a molded body that locates over the valve body bolts, thus eliminating the need for the filter retainer clip. The new design filter seal is a wider compression type seal that fits snug in its bore.

FIGURE 1 - THM 700-R4 TRANSMISSION IDENTIFICATION INFORMATION:

FIGURE 2 - OIL FILTER ASSEMBLY:

DATE OF PRODUCTION CHANGE: (Figure No. 1)

Beginning July 6, 1987 (Julian date 187) all 1987 THM 700-R4 transmissions were produced with the new design transmission filter (71) and filter seal (70), Figure No. 2.
SERVICE ACTION:

When servicing any 1982 through 1987 THM 700-R4 transmission (built prior to Julian date 187), use the previous design transmission filter and seal until current service stock is depleted. When using the new design filter and seal on any 1982 through 1987 THM 700-R4 transmission (built prior to Julian date 187), the filter retaining clip (reference parts book Illustration No. 87) is not needed and should be discarded.
NOTICE: Care should be taken when installing the new design filter and filter seal. The filter seal is a compression type seal and will fit snug in its bore. Damage to the filter neck could result if the filter is installed incorrectly.

To correctly install the filter and seal, coat the seal with petroleum jelly or Automatic Transmission Fluid and with the seal over the filter neck, insert the filter into its bore in the pump assembly. With the palm of your hand gently push on the filter until it seats.

SERVICE PARTS INFORMATION:

PART NO. DESCRIPTION

8657926 Package - Filter, Filter Seal
and Gasket

8657767 Seal - Filter Neck (Available

Separately)

LABOR OPERATION:

K6500 Pan and/or gasket, transmission oil replace .6 hr for C/K, R/V, S/T, M .8 hr for G