TORQUE CONVERTER END PLAY NEW MEASUREMENT TOOL

MODELS AFFECTED: ALL MODELS, ALL YEARS

A new, essential Torque Converter End Play Measurement tool, Kent-Moore number J-35138 (refer to Figure 1), has been developed and will be shipped to GM dealers approximately May, 1985. This new universal tool replaces the previously released End Play Measurement tools, Kent-Moore numbers J-28538, J-25020-02, J-29060, J-21371 and J-29830.

Use J-35138 to measure end play on an torque converters as follows:

1. Screw upper and lower knurled knobs together. Be sure collet end is not expanded (refer to Figure 1).

2. Insert J-35138 into the torque converter hub (refer to Figure 2).

3. Slide the tapered plug portion of the tool into the torque converter hub; this ensures proper alignment of the tool.

4. Hold upper knurled knob and turn wing nut clockwise until hand tight to expand collet into converter turbine hub. Then loosen wing nut (counterelockwise) until tool is loose enough to allow up and down movement while not removable from converter (usually 2 1/2 turns or more).

5. Hold upper knurled knob and turn lower knurled knob clockwise until hand tight to clamp tool in the converter turbine hub.

6. Attach magnetic base (J-26900-13) to torque converter and set up dial indicator (J-8001) so that indicator tip is in center of tool wing nut (refer to Figure 3).

7. To make end play check, push upper knurled knob down, zero out dial indicator and pull lower knurled knob up. Be sure tapered plug stays seated in converter hub. End play is the difference between up and down positions. DO NOT ALLOW WING NUT TO TURN WHEN MEASURING.

8. Remove tool by holding upper knurled knob and turning wing nut counterclockwise until the collet can be removed from the torque converter turbine hub.

Refer to the following chart for torque converter end play specifications. Torque converters that exceed the maximum end play specifications should be replaced.

TRANSMISSION MODEL CONVERTER TYPE MAXIMUM END PLAY

THM 440-T4 TCC/VCC 0.50mm THM 125C (0.019") THM200C THM 325-4L TCC 0.60mm THM 200-4R THM 350C (0.023") THM 200 THM 400 Open 1.30mm THM 325 THM 425 (non-TCC) (0.050") THM 350

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.