A/T - Torque Converter End Play Measurement & Tool
Bulletin No. T 85-82 File in Group 7Number 121
Corp. Ref. No. 8057907
Date May '85
SUBJECT: NEW TORQUE CONVERTER END PLAY 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 all torque converters as follows:
FIGURE 1 - J-35138TORQUE CONVERTER END PLAY MEASUREMENT TOOL:
1. Screw upper and lower knurled knobs together. Be sure collet end is not expanded (refer to Figure 1).
FIGURE 2INSTALLING J-35138 INTO CONVERTER:
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 (counterclockwise) 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.
FIGURE 3CHECKING END PLAY MEASUREMENT:
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 0.50 mm
THM 125C (0.019")
THM 200C 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