Main Control: Disassembly

NOTE: Make an identifying mark on each solenoid and the corresponding bore for correct assembly.

NOTE: Solenoids may visually appear the same but their designs/functions are different. Use care not to assemble the main control assembly incorrectly. Incorrect solenoid installation results in poor transmission shift quality.

NOTE: Note the location of the 8 check balls, 6 solenoid dampers, 2 internal valves and springs and 2 filter screens for reassembly.

Main Control Upper Half

Make an identifying mark on each solenoid and the corresponding bore for correct assembly.
Remove the 6 long molded leadframe-to-valve body bolts from the molded leadframe.
Carefully separate the molded leadframe from the main control assembly.
1. Molded leadframe
2. Main control assembly
Remove 19 short molded leadframe-to-valve body bolts from the main control assembly.
Separate the lower half of the main control assembly from the upper half of the main control assembly.
Remove and discard the main control valve body separator plate.
Remove the solenoid dampers, check balls, converter drain back valve and filter screens from the main control assembly. Note the location for assembly.
1. Solenoid dampers
2. Check balls
3. Converter drain back valve
4. Small filter screen
5. Large filter screen
Remove the retaining clips, caps, valves and valve springs from each bore of the main control assembly. Note the location and order for assembly.
Using clean mineral spirits, clean the upper half of the main control assembly.
Main Control Lower Half
Remove the 8 solenoid hold down bracket bolts and the solenoid hold down bracket.
Remove the solenoids.
Remove the retaining clips, caps, valves and valve springs from each bore of the main control assembly. Note the location and order for assembly.
Using clean mineral spirits, clean the lower half of the main control assembly.