This procedure replaces the overdrive solenoid in the U760E automatic transmission, requiring transmission pan removal and partial fluid drain.

Warnings

Tools required

Parts

• Overdrive solenoid (OD direct clutch solenoid) × 1 — Use OEM Toyota part or equivalent
• Transmission pan gasket × 1 — Use OEM specification
• Transmission drain plug crush washer × 1 — Use OEM specification

Fluids

• Toyota WS ATF — 4 qt

Preparation

1. Park vehicle on level ground and engage parking brake
2. Allow transmission to cool completely if vehicle was recently operated
3. Raise front of vehicle and support securely on jack stands at the front subframe
4. Remove front engine under cover (plastic splash shield) by removing push clips and 10mm bolts
5. Position drain pan under transmission pan

Procedure

1. 1

   Drain transmission fluid
   Locate the transmission drain plug on the bottom of the transmission pan. Using a 14mm socket, slowly loosen and remove the drain plug. Allow fluid to drain completely into the drain pan. This will take 5-10 minutes. Once drained, inspect the drain plug and replace the crush washer with a new one.
2. 2

   Remove transmission pan bolts
   Using a 10mm socket, remove all transmission pan bolts in a criss-cross pattern, starting from the center and working outward. There are approximately 16-18 bolts around the perimeter of the pan. Leave two bolts at opposite corners slightly threaded to prevent the pan from dropping suddenly.
3. 3

   Lower transmission pan
   With drain pan positioned to catch remaining fluid (approximately 1-2 quarts will still be in the pan), carefully remove the last two bolts while supporting the pan. Lower the pan slowly and allow remaining fluid to drain. Tilt the pan as needed to fully drain. Remove the pan and set aside on clean surface.
   ⚠Additional fluid will drain when pan is removed. Ensure drain pan is positioned correctly.
4. 4

   Clean pan and inspect filter
   Clean the transmission pan thoroughly with shop towels. Inspect for metal shavings or debris (small amounts are normal). Remove the old gasket from both the pan and transmission housing using a plastic scraper. Do not use metal scrapers that could damage the sealing surfaces. Inspect the transmission filter screen; if it appears clogged or damaged, replacement is recommended but not required for this procedure.
5. 5

   Locate overdrive solenoid
   Looking up at the valve body (visible with pan removed), locate the overdrive solenoid. It is positioned on the lower valve body, typically on the driver's side. The solenoid has an electrical connector and is held by one or two 10mm bolts. Note the solenoid orientation and connector position for reinstallation.
6. 6

   Disconnect solenoid electrical connector
   Press the tab on the electrical connector and carefully pull straight out to disconnect from the solenoid. Do not pull on the wires. If the connector is difficult to remove, use a small flat-blade screwdriver to gently release the locking tab.
7. 7

   Remove overdrive solenoid
   Using a 10mm socket, remove the solenoid mounting bolt(s). Carefully pull the solenoid straight out from the valve body. Some ATF may drip from the solenoid port. Inspect the O-ring on the solenoid for damage. If the new solenoid does not include a new O-ring, carefully remove the old O-ring and install it on the new solenoid, ensuring it is properly seated in the groove.
8. 8

   Install new overdrive solenoid
   Lubricate the solenoid O-ring with clean ATF. Align the new solenoid with the valve body port and push in firmly until fully seated. The solenoid should sit flush against the valve body. Install the mounting bolt(s) and tighten to specification.
   Torque spec

   Sensor Bolts10 Nm (8 lb-ft)
9. 9

   Reconnect electrical connector
   Push the electrical connector onto the new solenoid until it clicks into place. Gently tug on the connector to verify it is locked. Ensure the wiring is routed properly and will not interfere with pan installation.
10. 10

    Install new pan gasket and reinstall pan
    Position the new gasket on the transmission pan, ensuring all bolt holes align. Some gaskets are adhesive-backed. Carefully lift the pan into position, aligning it with the transmission housing. Start all pan bolts by hand to ensure proper thread engagement and pan alignment.
11. 11

    Torque transmission pan bolts
    Using a torque wrench, tighten all transmission pan bolts in a criss-cross pattern starting from the center and working outward. This ensures even gasket compression and prevents leaks. Make multiple passes, gradually increasing torque until all bolts reach the specified torque.
    Torque spec

    Pan Bolts15 Nm (11 lb-ft)
12. 12

    Install drain plug
    Clean the drain plug threads and the transmission pan drain hole. Install the new crush washer on the drain plug. Thread the drain plug in by hand, then tighten to specification using a 14mm socket and torque wrench.
    Torque spec

    Transmission Drain Plug30 Nm (22 lb-ft)
13. 13

    Refill transmission fluid
    Locate the transmission dipstick tube on the passenger side of the engine bay. Insert a long flexible funnel into the dipstick tube. Add 3.5 quarts of Toyota WS ATF slowly to avoid overfilling. Start the engine and let idle for 2-3 minutes, then check fluid level with engine running and transmission in Park. Add additional fluid as needed to bring level to the cold range on the dipstick.
    ⚠Do not overfill transmission. Overfilling can cause shifting problems and fluid aeration.
14. 14

    Reinstall under cover
    Reinstall the front engine under cover, securing all push clips and 10mm bolts. Lower vehicle from jack stands.

Reassembly

1. Ensure all pan bolts are torqued in criss-cross pattern to prevent leaks
2. Verify drain plug crush washer is installed before reinstalling drain plug
3. Route solenoid wiring away from pan mounting surface

Verification

• Start engine and verify no ATF leaks from transmission pan or drain plug
• With engine at operating temperature and foot on brake, shift through all gear positions (P-R-N-D-L) pausing 2-3 seconds in each position
• Return to Park and check ATF level with engine running. Level should be in the hot range on dipstick
• Test drive vehicle and verify smooth shifting, particularly during 3rd to 4th gear (overdrive) engagement
• Recheck fluid level after test drive and top off if necessary
• Inspect under vehicle for any ATF leaks after test drive

More procedures for this vehicle