CLUTCH PLATE PRODUCTION CHANGE NEW DIRECT CLUTCH PACK P/N

MODELS: 1990 C, K, R, V, P TRUCKS AND G-VANS WITH 3L80 (THM 400)

BULLETIN COVERS:

Some HYDRA-MATIC 3L80 (THM 400) models have a new direct clutch pack which includes two different steel plates that will increase minimum running clearance, reduce drag and prevent higher temperatures.

DATE OF PRODUCTION CHANGE:

(Figure 1)

Beginning April 3, 1990 (Julian Date 093) all 1990 FAA, HCA, HFA, HHA, LXA, MTA, MWA, MXA, MZA, SBA, SHA, SJA, TAA, TBA, TDA, TFA, TKA, TMA, TNA, TRA models will be built with this new clutch pack.

SERVICE PARTS INFORMATION:

Part New Previous Part Name Number Quantity Quantity

8625197 3 5 Plate-Clutch (.0915 Flat) (622) 8623849 2 0 Plate-Clutch (.077

NOTE: Install three 8625197 Steel Plates first, then two 8623849 on top. Altemate steel and composition plates as shown in figure 3. All 1990 vehicles built with previous quantity can be switched to the new quantity.

Parts are currently available through GMSPO.

SERVICE MANUAL REFERENCE: (Figure 2 & 3)

Refer to the Unit Repair Section of the appropriate Service Manual for the proper replacement procedures.

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.