EXPERTEC TSB (57-3)

Publication date: 1985-04-09
Reference number: 57-3

EXPERTEC TSB

TECHNICAL SERVICE BULLETIN

Reference Number(s): 57-3, Date of Issue: 04/09/85

TORQUE CONVERTER END PLAY - NEW MEASUREMENT TOOL

Model(s): Chevrolet

Pontiac

Oldsmobile

Buick

Cadillac

GMC Bulletin No.: Chevrolet 57-3

Pontiac 85-7-21

Oldsmobile 85-T-24

Buick 85-7-8

Cadillac T85-82

GMC 85-B-77

Date: 04/09/1985

BULLETIN ILLUSTRATION LIST

Fig 1: Graphic

Fig 2: Graphic

Fig 3: Graphic

SERVICE INFORMATION

A NEW, ESSENTIAL TORQUE CONVERTER END PLAY MEASUREMENT TOOL, KENT- MOORE NUMBER J35138 (See FIG. 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 J28538, J25020-02, J29060, J21371 AND J29830. USING J35138, END PLAY MEASUREMENT ON ALL TORQUE CONVERTERS IS PERFORMED AS FOLLOWS:

SERVICE PROCEDURE

SCREW UPPER AND LOWER KNURLED KNOBS TOGETHER. BE SURE COLLET END IS NOT EXPANDED (REFER TO Fig 1 ).
INSERT J35138 INTO THE TORQUE CONVERTER HUB (REFER TO Fig 2 ).
SLIDE TAPERED PLUG INTO TORQUE CONVERTER HUB. PLUG IS FOR ALIGNMENT OF TOOL.
HOLD UPPER KNURLED KNOB AND TURN WING NUT CLOCKWISE UNTIL HAND TIGHT TO EXPAND COLLET INTO CONVERTER TURBINE HUB. THEN LOOSEN WING NUT (COUNTER CLOCKWISE) 2 1/2 TURNS OR UNTIL TOOL IS LOOSE (WILL MOVE UP AND DOWN) WHILE NOT REMOVEABLE FROM CONVERTER.
HOLD UPPER KNURLED KNOB AND TURN LOWER KNURLED KNOB CLOCKWISE UNTIL HAND TIGHT TO CLAMP TOOL IN THE CONVERTER TURBINE HUB.
ATTACH MAGNETIC BASE (J26900-13) TO TORQUE CONVERTER AND SET UP DIAL INDICATOR (J8001) SO THAT INDICATOR TIP IS IN CENTER OF TOOL WING NUT (REFER TO Fig 3 ).
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.
REMOVE TOOL BY HOLDING UPPER KNURLED KNOB AND TURNING WING NUT COUNTER CLOCKWISE.

NOTE: REFER TO THE FOLLOWING CHART FOR TORQUE CONVERTER END PLAY SPECIFICATIONS. TORQUE CONVERTERS THAT EXCEED THE MAXIMUM END PLAY SPECIFICATIONS SHOULD BE REPLACED.

TORQUE CONVERTER END PLAY SPECIFICATIONS

Style	Size (Approximate Outside Outside Diameter)	End Play Specifications
TORQUE CONVERTER CLUTCH (T.C.C.)	245MM (10 INCHES)	0 - 0.50MM (0 - 0.019")
298MM (12 INCHES)		0 - 0.60MM (0 - 0.023")
OPEN CONVERTER (NON-T.C.C.)	ALL SIZES	0 - 1.30MM (0 - 0.050") 0047M