Ciera V6-173 2.8L VIN W FI (1986)
FIGURE 3 - CASE PASSAGES - CHANNEL PLATE SIDE
Inspect the 2nd clutch passage by measuring the hole depth which should be a minimum of 72 mm (2.835"), as shown in Figures 2 and 3. If the 2nd
clutch passage is properly drilled, refer to the THM 440-T4 diagnosis section in your service manual for other possible causes of a harsh 1-2 shift
condition.
If the 2nd clutch passage is not fully drilled:
1.
Remove the tranaxle and disassemble components up to and including the channel plate (24).
2.
Mark an 8.5 mm (21/64") drill bit at 72 mm (2.835") from the tip using taps or other acceptable method. From the bottom pan side of the case,
finish drilling the 2nd clutch passage to the depth as marked on the drill bit.
NOTICE:
Avoid drilling too deep into the 2nd clutch passage because it will damage the case.
3.
Remove metal chips caused by drilling and thoroughly flush the repaired case passages with clean solvent.
