Main Control - Overhaul
Main Control - Overhaul
WARNING: Before beginning any service procedure, REFER to Safety Warnings . Failure to follow this instruction may result in serious personal injury.
Special Tool(s)
Exploded View
Main Control
Main Control Valve Body
Solenoid Body
Main Control Valve Body
1. Remove the 2 solenoid body-to-valve body bolts and separate the solenoid body from the valve body.
2. Remove the 2 separator plate-to-solenoid body bolts and remove and discard the separator plate.
3. Remove the 3 check balls and the solenoid damper.
1. Check balls
2. Solenoid damper
4. Remove the manual valve.
5. NOTICE: Remove the valves by tapping the valve body on the palm of the hand to slide the valves out of the bores or by threading a 4-mm bolt into the valves and pulling them out. It may be necessary to remove the valves and springs using a pick. If it is necessary to use a pick, use extreme caution to prevent damaging the valves or valve bores. If necessary, disassemble parts of the main control valve body in small groups. Take special care when handling the main control components, since they are the most precise and delicate parts of the transmission. Neatly arrange the parts as they are removed to avoid mixing similar pieces.
NOTICE: Do not stone or polish any valves or damage to the valves can occur. If the valves do not move freely, install a new assembly.
NOTE: The bypass valve is held in with a spring-loaded retainer. Be careful not to lose the retainer when removing it.
Compress the valve springs with a screwdriver and remove the retainers with a magnet. Use a pick to remove the bypass valve retainer. Remove the individual valves and springs from the main control valve body by tapping the valve body on the palm of the hand to slide the valves out of the bores. If needed, use a 4-mm bolt to thread into the valves to remove the valves. See the Valve Body illustration for valve and spring locations. Clean valves, springs and main control valve body.
6. NOTICE: Do not stone or polish any valves or damage to the valves can occur. If the valves do not move freely during assembly, install a new valve body.
Install the valve body valves, springs and retaining clips in the main control valve body. See the Valve Body illustration at the beginning of this procedure for valve and spring locations.
7. Install the manual valve in the valve body.
8. Install the 3 check balls and the solenoid damper.
1. Check balls
2. Solenoid damper
9. For disassembly and assembly of the solenoid body, REFER to Solenoid Body.
10. Install the new separator plate and the 2 separator plate-to-solenoid body bolts.
- Torque: 10 Nm (89 lb-in).
11. Position the solenoid body assembly on the valve body and install the 2 solenoid body-to-valve body bolts.
- Torque: 10 Nm (89 lb-in).
Solenoid Body
1. If not previously done, remove the 2 solenoid body-to-valve body bolts and separate the solenoid body from the valve body.
2. Remove the 2 separator plate-to-solenoid body bolts and remove and discard the separator plate.
3. Remove and discard the circuit filter.
4. Compress the valve springs with a screwdriver and remove the retainers with a magnet. Remove the individual valves and springs from the solenoid body by tapping it on the palm of the hand to slide the valves out of the bores. See the Solenoid Body illustration at the beginning of this procedure for valve and spring locations.
5. NOTICE: Be careful not to bend or twist the solenoid body leadframe or the solenoid terminals when removing the leadframe or damage can occur to the leadframe or the solenoids.
Remove the 5 screws and carefully remove the leadframe from the solenoids by lifting it straight up evenly.
6. NOTICE: The solenoids are calibrated from the factory and are not all the same. Failure to mark the solenoids to the ports they were originally in can result in mixing the solenoids and can cause damage to the transmission or a harsh shift.
Using a paint marker, number the solenoids and the solenoid body to correspond with the ports from which the solenoids are located in the solenoid body.
7. Remove the solenoid retaining pins.
8. Remove the solenoids from the solenoid body.
9. NOTICE: Be careful not to wash the numbers from the solenoids or the solenoid body. Failure to install the solenoids in the ports they were originally in can result in damage to the transaxle or a harsh shift.
NOTICE: Do not stone or polish any valves or damage to the valves can occur. If the valves do not move freely during assembly, install a new solenoid body.
Clean and inspect the solenoid body, solenoids and valve assemblies for damage. Inspect the solenoid screens for debris that may restrict fluid flow through the screen.
10. NOTICE: The solenoids are calibrated from the factory and are not all the same. Failure to install the solenoids in the ports they were originally in can result in damage to the transaxle or a harsh shift.
If new solenoid(s) are not being installed, position the solenoids in the solenoid body ports from which their numbers correspond.
11. If installing a new VFS (Variable Force Solenoid), determine the base part number of the solenoid(s). The TCC (Torque Converter Clutch) solenoid, SSA (Shift Solenoid A) and SSC (Shift Solenoid C) are all normally low pressure solenoids. The LPC (Line Pressure Control) solenoid, SSB (Shift Solenoid B) and SSD (Shift Solenoid D) are all normally high pressure solenoids. SSE (Shift Solenoid E) is not a VFS (Variable Force Solenoid), it is an ON/OFF solenoid.
12. If installing a new LPC (Line Pressure Control) solenoid, SSB (Shift Solenoid B) or SSD (Shift Solenoid D), note the color of the electrical terminal area of the solenoid. The color will be blue or green and the solenoid can only be replaced with the same color solenoid. If a new solenoid with that color is not available, install a new solenoid body.
13. Determine the part number suffix by checking the solenoid service band number etched on the side of the solenoid. The band number is the third digit on the side of the solenoid and will be a 1, 2, 3, 4 or 5. Use the following table to determine the part number suffix and match the new solenoid base part number and suffix with the old solenoid. Install the solenoid in the solenoid body.
14. Install the solenoid retaining pins.
15. Install 307-636 in the solenoid body to align the leadframe for installation.
16. Position the leadframe on 307-636 and carefully install the leadframe by pushing it straight down into the solenoids.
17. Remove 307-636.
18. Install the 5 leadframe screws.
19. NOTICE: If the valves do not move freely during assembly, install a new solenoid body. Failure to install a new solenoid body can result in a harsh shift or damage to the transmission.
Install the solenoid body valves, springs and retaining clips in the solenoid body. See the Solenoid Body illustration at the beginning of this procedure for valve and spring locations.
20. Install a new circuit filter.
21. Install the new separator plate and the 2 separator plate-to-solenoid body bolts.
- Torque: 10 Nm (89 lb-in).
22. If not previously done, REFER to Main Control Valve Body for disassembly and assembly of the valve body.
23. Position the solenoid body on the valve body and install the 2 solenoid body-to-valve body bolts.
- Torque: 10 Nm (89 lb-in).