Replace all shift solenoids in the U760E 8-speed automatic transmission by removing the transmission pan and valve body assembly to access the solenoid pack.

Warnings

Tools required

Parts

• Shift solenoid assembly kit (SL1, SL2, SL3, SL4, SLU, SLT) × 1 — Use OEM specification
• Transmission pan gasket × 1 — Use OEM specification
• Valve body gasket kit × 1 — Use OEM specification
• Transmission drain plug crush washer × 1 — Use OEM specification
• Toyota WS ATF filter (if equipped) × 1 — Use OEM specification

Fluids

• Toyota WS ATF — 10 qt

Preparation

1. Park vehicle on level surface and allow transmission to cool completely (minimum 2 hours)
2. Disconnect negative battery terminal and wait 90 seconds for airbag system discharge
3. Raise vehicle and support securely on jack stands at manufacturer lift points
4. Remove front splash shield and transmission under cover panels
5. Place large drain pan (12+ quart capacity) under transmission pan
6. Verify you have correct solenoid kit by cross-referencing transmission code on identification plate
7. Prepare clean workspace area for valve body disassembly with lint-free towels

Procedure

1. 1

   Drain transmission fluid
   Remove transmission drain plug from bottom of pan and allow fluid to drain completely. Inspect drained fluid for metal particles or debris indicating internal wear. Once drained, remove and discard old crush washer from drain plug. Clean drain plug threads and magnet thoroughly with brake cleaner. Install new crush washer on drain plug and reinstall finger-tight (will torque after pan removal).
   Torque spec

   Drain Plug34 Nm (25 lb-ft)
2. 2

   Remove transmission pan
   Remove all transmission pan bolts in reverse criss-cross pattern, leaving two bolts at opposite corners partially threaded. Carefully break pan seal with plastic trim tool, allowing remaining fluid to drain. Remove final two bolts and lower pan. Clean all gasket material from pan and transmission case mating surfaces using plastic scraper. Inspect pan for metal debris and clean magnet. Inspect internal filter (if equipped) and replace if debris is present.
   ⚠Approximately 2-3 quarts of fluid will remain in pan when bolts are removed. Control pan descent carefully to avoid spills.
   Torque spec

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

   Document wiring harness routing
   Photograph or diagram the exact routing of all internal wiring harness connections before disconnecting anything. Disconnect all solenoid electrical connectors by pressing release tabs and pulling straight up. Label each connector position if not already marked by manufacturer. Disconnect transmission range sensor connector and any other valve body electrical connections.
   ℹ️Proper connector orientation is critical. Forcing connectors during reassembly can damage pins.
4. 4

   Remove valve body assembly
   Remove all valve body mounting bolts in the sequence marked on the valve body (typically start from center and work outward). Note that bolts may be different lengths - organize by position. Carefully lower valve body assembly while guiding internal wiring harness and manual valve through case opening. Place valve body on clean, lint-free surface with gasket side facing up. Do not turn valve body upside down to prevent check balls from falling out.
   ⚠Valve body weighs approximately 15 lbs and contains spring-loaded components. Lower carefully and keep level.
5. 5

   Remove solenoid pack assembly
   With valve body removed from transmission, locate the solenoid pack assembly on top of valve body. Remove solenoid pack retaining bolts (typically 6-8 bolts). Carefully lift solenoid pack straight up from valve body, noting position of alignment dowels. Inspect old solenoids for physical damage, burnt connectors, or fluid contamination. Clean solenoid mounting surface on valve body with lint-free towel and brake cleaner.
   ⚠Do not allow brake cleaner to enter valve body passages. Clean only external surfaces.
   Torque spec

   Sensor Bolts11 Nm (8 lb-ft)
6. 6

   Install new solenoid pack
   Verify new solenoid pack matches old unit exactly in connector configuration and mounting pattern. Install new gasket or O-rings onto valve body per kit instructions. Align solenoid pack with dowel pins and lower straight down onto valve body. Install all solenoid pack retaining bolts and tighten in criss-cross pattern to specification. Verify all solenoids seat flush against valve body surface.
   Torque spec

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

   Inspect and prepare valve body
   Inspect valve body mating surface gasket and replace with new gasket from kit. Verify all check balls are in correct positions by comparing to service manual diagram (critical for proper shift function). Inspect manual valve for wear or scoring. Clean any residual gasket material from valve body perimeter using plastic scraper only.
   ⚠️Missing or mispositioned check balls will cause catastrophic transmission failure. Verify positions against service manual before reinstallation.
8. 8

   Reinstall valve body assembly
   Position new valve body gasket on transmission case, aligning with dowel pins. Carefully raise valve body into position, guiding manual valve into case and threading wiring harness through opening. Align valve body with dowel pins and seat fully against case. Install all valve body mounting bolts hand-tight, then torque in specified sequence (center to outer) to specification. Verify manual valve moves freely through full range.
   ⚠Manual valve must engage properly with manual valve lever. Verify engagement before tightening bolts.
9. 9

   Reconnect electrical connections
   Reconnect all solenoid electrical connectors in documented positions, ensuring each connector clicks into locked position. Verify no pins are bent or damaged. Reconnect transmission range sensor and any other disconnected connectors. Gently tug on each connection to verify proper locking. Route wiring harness exactly as documented in step 3.
   ⚠Crossed or improperly connected solenoids will cause incorrect shift patterns and possible transmission damage.
10. 10

    Install transmission pan
    Install new pan gasket on transmission case (or apply RTV sealant if gasket-less design per manufacturer specification). Position pan and install all pan bolts hand-tight. Torque pan bolts in criss-cross pattern starting from center to specification. Verify no gaps between pan and case. Now torque the drain plug to final specification.
    Torque spec

    Pan Bolts16 Nm (12 lb-ft)

    Drain Plug34 Nm (25 lb-ft)
11. 11

    Fill transmission with ATF
    Remove fill plug from side of transmission case. Using fluid transfer pump, add approximately 8 quarts of fresh Toyota WS ATF through fill hole. Continue adding until fluid begins to drip from fill hole. Install fill plug finger-tight. Reconnect battery negative terminal. Start engine and allow to idle in Park. With foot on brake, cycle transmission through all gears, pausing 3 seconds in each position. Return to Park.
    ⚠Engine must be running and transmission at operating temperature (160-180°F) for proper fill level check.
    Torque spec

    Fill Plug34 Nm (25 lb-ft)
12. 12

    Set final fluid level
    With engine running at idle in Park on level ground, remove fill plug. Fluid should drip steadily from fill hole at operating temperature. If no fluid drips, add more until steady drip is achieved. If fluid streams out, too much fluid is present (allow excess to drain until steady drip). When proper level is confirmed with steady drip at operating temperature, install fill plug and torque to specification.
    ⚠Transmission must be at 160-180°F operating temperature for accurate level check. Use scan tool to verify temperature if available.
    Torque spec

    Fill Plug34 Nm (25 lb-ft)
13. 13

    Perform transmission relearn procedure
    Using Toyota Techstream scan tool or equivalent, perform transmission control module reset and shift point relearn procedure. Clear any diagnostic trouble codes. If scan tool is not available, perform road test relearn by driving vehicle through all gears in normal acceleration patterns for approximately 15-20 miles, allowing transmission to adapt to new solenoids.
    ℹ️Shift quality may be irregular for first 10-15 miles as transmission control module relearns shift characteristics.

Reassembly

1. Reinstall all under covers and splash shields removed during preparation
2. Lower vehicle from jack stands
3. Verify no tools or parts were left in engine bay or under vehicle
4. Check for fluid leaks around pan and drain plug after engine has run for 5 minutes

Verification

• Start engine and verify no transmission-related warning lights are illuminated
• Check for fluid leaks around transmission pan, drain plug, and fill plug
• Perform test drive including all gear ranges and confirm smooth shifting with no slipping, flaring, or harsh engagements
• Verify proper engagement in Park, Reverse, Neutral, and all Drive ranges
• Use scan tool to verify no transmission-related diagnostic trouble codes are present
• Recheck fluid level after test drive and top off if necessary using fill plug method
• Document final fluid level and any shift characteristics for customer records

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