This procedure replaces the overdrive solenoid in the 6R80 automatic transmission by removing the transmission pan, valve body cover, and accessing the solenoid pack.

Warnings

Tools required

Parts

• Overdrive solenoid (SSA/SSB solenoid pack) × 1 — Use OEM Ford solenoid
• Transmission pan gasket × 1 — 6R80 transmission pan gasket
• Valve body cover gasket × 1 — 6R80 valve body cover gasket
• Transmission filter × 1 — 6R80 internal filter (optional but recommended)

Fluids

• Motorcraft MERCON LV ATF — 11 qt

Preparation

1. Park vehicle on level surface and engage parking brake
2. Allow transmission to cool completely if recently driven (minimum 2 hours)
3. Raise vehicle and support securely on jack stands at frame rails
4. Remove skid plate if equipped (4WD models typically have front skid plate)
5. Place drain pan under transmission pan

Procedure

1. 1

   Drain transmission fluid
   Locate the transmission drain plug at the rear of the transmission pan. Using appropriate socket, slowly loosen drain plug and allow fluid to drain completely into drain pan. Remove drain plug fully and inspect crush washer condition.
   Torque spec

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

   Remove transmission pan
   Once fluid is fully drained, remove all transmission pan bolts in a criss-cross pattern starting from the center and working outward. Carefully lower pan as residual fluid will remain. Clean pan thoroughly and inspect for metal shavings or debris that may indicate other transmission issues.
   Torque spec

   Pan Bolts19 Nm (14 lb-ft)
3. 3

   Remove transmission filter
   The internal filter is visible once pan is removed. Pull filter straight down to remove from valve body. Note orientation and sealing surface condition. If replacing filter, ensure new filter O-rings are properly lubricated with ATF before installation.
   ℹ️Additional fluid will drain when filter is removed. Keep drain pan positioned under transmission.
4. 4

   Remove valve body cover
   Locate the valve body cover on the bottom of the transmission (visible after pan removal). Remove all cover screws in a systematic pattern. Carefully separate cover from valve body, noting gasket position. The solenoid pack is mounted to the valve body underneath this cover.
   Torque spec

   Cover Screws12 Nm (9 lb-ft)
5. 5

   Disconnect solenoid electrical connectors
   Locate the overdrive solenoid pack (typically labeled SSA and SSB solenoids in the 6R80). Carefully disconnect the electrical connector by pressing the release tab and pulling straight up. Do not pull on wires. Note connector orientation for reinstallation.
   ⚠Solenoid connectors are fragile. Use controlled force to avoid breaking connector tabs.
6. 6

   Remove overdrive solenoid
   Remove the solenoid mounting bolts securing the overdrive solenoid pack to the valve body. Carefully pull solenoid straight out from valve body bore. Inspect the bore for debris or damage. Note the position of any alignment pins or O-rings on the old solenoid.
   Torque spec

   Sensor Bolts12 Nm (9 lb-ft)
7. 7

   Install new overdrive solenoid
   Lubricate new solenoid O-rings with clean MERCON LV ATF. Align solenoid carefully with valve body bore and press firmly into position ensuring O-rings seat properly. Install mounting bolts and torque to specification in a cross pattern.
   ⚠Ensure solenoid is fully seated before tightening bolts. Partially seated solenoids will leak and fail immediately.
   Torque spec

   Sensor Bolts12 Nm (9 lb-ft)
8. 8

   Reconnect electrical connector
   Reconnect the electrical connector to the new solenoid, ensuring it clicks into place securely. Verify connector is fully seated by gently pulling on connector body (not wires).
9. 9

   Install valve body cover
   Clean valve body and cover mating surfaces thoroughly with solvent and lint-free shop rags. Install new gasket on cover. Align cover carefully to valve body and install all cover screws finger tight first, then torque in a criss-cross pattern.
   Torque spec

   Cover Screws12 Nm (9 lb-ft)
10. 10

    Install transmission filter
    If installing new filter, lubricate O-rings with ATF. Align filter with valve body and press firmly until fully seated. Filter should sit flush against valve body mounting surface.
11. 11

    Install transmission pan
    Clean transmission case and pan mating surfaces completely. Install new pan gasket (do not use RTV unless specified by gasket manufacturer). Position pan and install all bolts finger tight. Torque pan bolts in criss-cross pattern starting from center working outward.
    ⚠Over-torquing pan bolts will warp the pan and cause leaks. Use torque wrench and follow pattern strictly.
    Torque spec

    Pan Bolts19 Nm (14 lb-ft)
12. 12

    Install drain plug and fill transmission
    Install drain plug with new crush washer if equipped and torque to specification. Lower vehicle to ground. Remove transmission dipstick (located at rear of engine bay on passenger side) and insert fluid pump or funnel. Add approximately 5-6 quarts of MERCON LV ATF initially.
    Torque spec

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

    Check fluid level and cycle transmission
    Start engine and allow to idle. With foot on brake, shift through all gear positions (P-R-N-D-L) pausing 3 seconds in each position. Return to Park. Check fluid level on dipstick with engine running and transmission at operating temperature (160-180°F). Fluid should read in HOT range. Add fluid as needed in 1/2 quart increments.
    ⚠️Keep hands and tools clear of cooling fan and belts while engine is running.

Reassembly

1. Reinstall skid plate if equipped, torquing mounting bolts to specification
2. Double-check all connections and bolts for proper torque
3. Verify no fluid leaks from pan or drain plug after initial test drive

Verification

• Test drive vehicle and verify smooth shifting through all gears including overdrive (4th-6th gears on 6R80)
• Monitor for transmission codes using OBD-II scanner - no solenoid-related codes should be present
• Check for fluid leaks around transmission pan and drain plug after test drive
• Verify transmission fluid level is correct with transmission at operating temperature
• Confirm overdrive lockup occurs at highway speeds (typically 45+ mph)

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