C 3500 Truck 2WD V8-454 7.4L (1990)
The assembly torque for the service bolt is 50 N-m (37 lbs.ft.). The run-in torque will be approximately half of this value.
If the transmission already contains the service bolt (yellow/gold color) or if the production bolt removed is shorter in length (some 3L80/3L80-HD only,
refer to corporate bulletin # 077143) than the service bolt, the center support bolt thread cannot be resized and the center support assembly must be
replaced.
J 39919 CENTER SUPPORT THREAD REAMER KIT (Figure 3)
J 39919 consist of: J 39919-1 Reamer and J 39919-2 Gage Pin
STEP 1: Visually inspect the threads of the center support for damage and proceed if threads appear okay.
STEP 2: With the center support removed from the transmission, attempt to insert J 39919-2 Gage Pin into the center support threaded hole (large
chamfer end towards hole).
NOTE:
DO NOT FORCE GAUGE PIN INTO HOLE.
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IF GAUGE PIN WILL NOT FIT INTO HOLE (AT LEAST HALF WAY) PROCEED TO STEP 3.
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IF GAUGE PIN FITS INTO HOLE, REPLACEMENT OF THE CENTER SUPPORT IS NECESSARY.
STEP 3: Proceed with this step only if gauge pin won't fit into threaded hole.
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USING J 39910-1 REAMER AND AN APPROPRIATE T-HANDLE, POSITION J 39919-1 INTO HOLE.
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ROTATE J 39919-1 BY HAND IN A CLOCKWISE DIRECTION USING LIGHT PRESSURE. (DO NOT USE A DRILL MOTOR.)
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ROTATE J 39919-1 APPROXIMATELY 4-6 TIMES OR UNTIL REAMER PASSES THROUGH HOLE AND BOTTOMS OUT.
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REMOVE J 39919-1 AND CLEAN CENTER SUPPORT BEFORE ASSEMBLY.
NOTE:
This tool is designed to remove a minimal amount of material from the hole to Insure proper fit of the new retaining bolt.
Before reassembly into the transmission case, inspect the canter support for wear and/or damage and for presence of the orifice cup plug. Check the case
