Main Control Valve Body
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NOTE: 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.NOTE: The bypass valve is held in with a spring-loaded retainer. Be careful not to lose the retainer when removing it.
Use a pick to remove the bypass valve retainer.
General Equipment: Magnet, 4-mm bolt.
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NOTE: 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.
Clean the valves, springs and main control valve body.
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NOTE: 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.
For valve and spring locations refer to the Valve Body illustration at the beginning of this procedure.
- For disassembly and assembly of the solenoid body, refer to SOLENOID BODY in this procedure.
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Solenoid Body
- If not previously done, separate the solenoid body from the valve body.
- Compress the valve springs 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.
General Equipment: Magnet.
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NOTE: 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.
Lift straight up evenly.
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NOTE: 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.
Number the solenoids and the solenoid body to correspond with the ports from which the solenoids are located in the solenoid body.
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NOTE: 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 transmission or a harsh shift.NOTE: 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.
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NOTE: 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 transmission 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.
- If installing a new VFS
, determine the base part number of the solenoid(s). The TCC
solenoid, SSA
and SSC
are all normally low pressure solenoids. The LPC
solenoid, SSB
and SSD
are all normally high pressure solenoids. The SSE
is not a VFS
, it is an ON/OFF solenoid.
Item Part Number Description 1 7G383 LPC solenoid (normally high) 2 7G136 SSC solenoid (normally low) 3 7G136 TCC (normally low) 4 7G484 SSE (normally closed [OFF]) 5 7G136 SSA (normally low) 6 7G383 SSB (normally high) 7 7G383 SSD solenoid (normally high) 8 7G391 Solenoid body - If installing new solenoids, note the color of the plastic nozzle and the large O-ring. High pressure solenoids, such as the LPC
solenoid, SSB
and SSD
, have black plastic nozzles and orange O-rings. Low pressure solenoids, such as the TCC
solenoid, SSA
and SSC
, have brown plastic nozzles and green O-rings. The solenoids can only be replaced with the same color solenoid.
- Determine the part number suffix by checking the solenoid service band number etched on the side of the solenoid. The band number is next to the two-dimensional matrix barcode on the side of the solenoid and will be a 1, 2, 3, 4 or 5. Determine the part number suffix and match the new solenoid base part number and suffix with the old solenoid.
Solenoid Band Number Part Number Suffix 1 B 2 C 3 D 4 E 5 F - Solenoid retaining pins.
- Special Tool(s): Pins, Leadframe Guide 307-636.
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NOTE: Be careful not to bend or twist the solenoid body leadframe or the solenoid terminals when installing the leadframe or damage can occur to the leadframe or the solenoids.
Push straight down evenly.
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NOTE: 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.
For valve and spring location, refer to the SOLENOID BODY illustration at the beginning of this procedure.
- If not previously done, refer to MAIN CONTROL VALVE BODY in this procedure for disassembly and assembly of the valve body.