This procedure covers the removal and replacement of the overdrive solenoid in the automatic transmission of a 2019-2024 Toyota RAV4 with the 2.5L I4 engine.

Warnings

Tools required

Parts

• Overdrive solenoid (pressure control solenoid assembly) × 1 — Use OEM specification
• Transmission pan gasket × 1 — Use OEM specification
• Transmission drain plug crush washer × 1 — Use OEM specification
• Valve body cover gasket × 1 — Use OEM specification

Fluids

• Toyota WS ATF — 4.5 qt

Preparation

1. Park vehicle on level surface and engage parking brake
2. Run engine until transmission reaches operating temperature (approximately 10 minutes of driving)
3. Turn off engine and allow to cool for 20-30 minutes
4. Raise vehicle and secure on jack stands rated for vehicle weight
5. Remove front engine splash shield and transmission splash guard
6. Disconnect negative battery terminal to prevent electrical faults during solenoid connector removal

Procedure

1. 1

   Drain transmission fluid
   Position drain pan under transmission drain plug. Remove drain plug using 14mm socket and allow fluid to drain completely (approximately 4-5 quarts will drain). Inspect drain plug magnet for excessive metal debris which may indicate internal transmission damage. Clean drain plug and install new crush washer.
   Torque spec

   Transmission Drain Plug30 Nm (22 lb-ft)
2. 2

   Remove transmission pan
   Remove all transmission pan bolts in a criss-cross pattern starting from the edges and working toward center. Allow any remaining fluid to drain. Carefully lower pan and note location of any dowel pins. Remove and discard old gasket, cleaning both mating surfaces thoroughly with brake cleaner and lint-free towels.
   ⚠Additional fluid will drain when pan is removed. Ensure drain pan is properly positioned.
   Torque spec

   Pan Bolts16 Nm (12 lb-ft)
3. 3

   Access valve body assembly
   With transmission pan removed, locate the valve body assembly. The overdrive solenoid (pressure control solenoid) is mounted on the valve body and secured with bolts. Take photographs of wiring harness routing and connector positions for reference during reassembly.
4. 4

   Disconnect solenoid electrical connectors
   Carefully disconnect the electrical connectors from the solenoid assembly. Press release tabs fully before pulling connectors straight out to avoid damaging pins. Note the specific connector that corresponds to the overdrive solenoid if multiple solenoids are present on the valve body.
   ⚠Do not pull on wires. Use connector body only to prevent wire damage.
5. 5

   Remove valve body cover
   Remove cover screws securing the valve body cover in the area of the overdrive solenoid. Some models may require partial valve body lowering for access. Remove cover carefully to expose solenoid mounting bolts. Keep track of bolt locations as they may be different lengths.
   Torque spec

   Cover Screws11 Nm (8 lb-ft)
6. 6

   Remove overdrive solenoid
   Remove the sensor bolts securing the overdrive solenoid to the valve body. Carefully extract the solenoid straight out to avoid damaging the valve body bore or solenoid seals. Inspect the solenoid mounting area for debris or damage. Remove and discard old O-rings or seals.
   ⚠Do not pry against aluminum valve body surfaces as they are easily damaged.
   Torque spec

   Sensor Bolts11 Nm (8 lb-ft)
7. 7

   Prepare new solenoid
   Unpack new overdrive solenoid and verify it matches the original. Lubricate new O-rings with clean Toyota WS ATF. Inspect valve body bore and clean if necessary using lint-free towels. Do not use abrasive materials on valve body surfaces.
8. 8

   Install new overdrive solenoid
   Insert new solenoid straight into valve body bore, ensuring proper alignment. Do not force or cross-thread. Install and hand-tighten sensor bolts, then torque in a criss-cross pattern to specification.
   Torque spec

   Sensor Bolts11 Nm (8 lb-ft)
9. 9

   Reinstall valve body cover
   Install new valve body cover gasket if removed. Position cover and install cover screws, tightening in a criss-cross pattern to specification. Ensure cover seats properly against valve body without gaps.
   Torque spec

   Cover Screws11 Nm (8 lb-ft)
10. 10

    Reconnect electrical connectors
    Reconnect solenoid electrical connectors, ensuring they click into place securely. Verify connector locking tabs are fully engaged. Route wiring harness as photographed during disassembly, ensuring no pinch points.
11. 11

    Install transmission pan
    Install new transmission pan gasket on pan. Ensure gasket is properly seated in pan groove if equipped. Lift pan into position, aligning any dowel pins. Install pan bolts finger-tight, then torque in criss-cross pattern starting from center and working outward.
    Torque spec

    Pan Bolts16 Nm (12 lb-ft)
12. 12

    Refill transmission fluid
    Reconnect negative battery terminal. Locate transmission fill plug or use dipstick tube for refilling. Add approximately 4.5 quarts of Toyota WS ATF. Start engine and allow to idle in Park. Shift through all gear positions, pausing 2-3 seconds in each. Return to Park and check fluid level at operating temperature. Add fluid as needed to reach proper level on dipstick or until fluid begins to drip from fill plug.
    ⚠Do not overfill transmission. Excess fluid can cause shifting problems and fluid aeration.

Reassembly

1. Reinstall transmission splash guard and engine splash shield
2. Lower vehicle from jack stands
3. Dispose of used transmission fluid properly at recycling center
4. Clear any diagnostic trouble codes using OBD-II scanner if check engine light is present

Verification

• With engine at operating temperature, verify transmission fluid level is within proper range
• Test drive vehicle through all gear ranges, verifying smooth shifts and proper overdrive engagement
• Check for fluid leaks around transmission pan and drain plug after test drive
• Verify no transmission-related diagnostic codes are present using OBD-II scanner
• Monitor shift quality over next 50-100 miles to ensure adaptive learning has completed

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