This procedure covers the removal and replacement of the transmission mount on a 2015-2020 Ford F-150 with the 3.5L EcoBoost V6 engine.

Warnings

Tools required

Parts

• Transmission mount × 1 — Use OEM specification

Preparation

1. Park vehicle on level ground and engage parking brake
2. Chock rear wheels to prevent rolling
3. Raise and safely support vehicle on jack stands at manufacturer-specified lift points
4. Allow exhaust system to cool completely if vehicle was recently driven
5. Inspect transmission mount area and spray penetrating oil on fasteners if corrosion is present

Procedure

1. 1

   Position transmission jack
   Position a transmission jack or floor jack with a wide wood block under the transmission oil pan. Raise jack until it just makes contact with the pan but does not lift the transmission. This will support the transmission weight when the mount is removed.
   ⚠Use a wood block to distribute load and prevent damage to the transmission oil pan. Do not jack directly on the pan without protection.
2. 2

   Remove transmission mount-to-crossmember fasteners
   Locate the transmission mount where it attaches to the crossmember. Remove the bolts or nuts securing the mount to the crossmember from below. These typically use 15mm or 18mm fasteners depending on the specific mount configuration.
   Torque spec

   Transmission Mount Bolts65 Nm (48 lb-ft)
3. 3

   Raise transmission slightly
   Carefully raise the transmission jack approximately 1/4 to 1/2 inch to relieve pressure on the mount and create clearance between the mount and crossmember. Monitor the transmission position to ensure it does not contact surrounding components.
4. 4

   Remove mount-to-transmission fasteners
   Remove the bolts securing the transmission mount to the transmission case. These are typically accessed from the side or below. On the 10R80 transmission used with the 3.5L EcoBoost, there are usually 2-4 bolts securing the mount bracket to the transmission.
   Torque spec

   Transmission Mount Bolts65 Nm (48 lb-ft)
5. 5

   Remove transmission mount
   Remove the transmission mount from the vehicle. If the mount is stuck, use a pry bar to carefully separate it from the crossmember or transmission. Inspect the mount for signs of wear, cracking, oil saturation, or separation of the rubber from metal components.
6. 6

   Clean mounting surfaces
   Clean the mounting surfaces on both the transmission and crossmember using a wire brush or scraper. Remove any old rubber residue, dirt, or corrosion. Ensure surfaces are clean and flat for proper seating of the new mount.
7. 7

   Install new transmission mount
   Position the new transmission mount onto the transmission case, aligning the mounting holes. Start all mount-to-transmission bolts by hand to ensure proper thread engagement before tightening any fasteners.
8. 8

   Torque mount-to-transmission bolts
   Tighten the transmission mount-to-transmission case bolts in a cross pattern to the specified torque. Use the appropriate torque specification based on bolt size: 83 Nm (61 lb-ft) for larger bolts or 65 Nm (48 lb-ft) for smaller bolts. If using a mount bracket with separate mounting bolts, torque to 86 Nm (63 lb-ft).
   Torque spec

   Transmission Mount Bolts65 Nm (48 lb-ft)
9. 9

   Lower transmission onto mount
   Carefully lower the transmission jack until the transmission mount seats fully onto the crossmember. Verify proper alignment of the mount with the crossmember mounting holes before proceeding.
10. 10

    Install and torque mount-to-crossmember fasteners
    Install the transmission mount-to-crossmember bolts or nuts. Tighten to the specified torque of 83 Nm (61 lb-ft) for larger diameter fasteners or 65 Nm (48 lb-ft) for standard fasteners, based on your specific mount configuration.
    Torque spec

    Transmission Mount Bolts65 Nm (48 lb-ft)
11. 11

    Remove transmission jack
    Carefully lower and remove the transmission jack from under the vehicle. Verify the transmission is fully seated on the mount and no unusual sagging or misalignment is visible.

Reassembly

1. Visually inspect all fasteners to ensure they are fully tightened
2. Verify no tools or parts were left in the work area
3. Lower vehicle from jack stands carefully

Verification

• Start the engine and shift through all transmission gears while stationary to verify normal operation
• Check for excessive vibration or movement in the transmission while shifting between Drive and Reverse
• Test drive the vehicle and verify smooth shifting with no unusual vibrations or noises from the transmission area
• Perform a final visual inspection under the vehicle to confirm the mount is properly seated and all fasteners are secure

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