Will not go into gear when engine is running

Good evening.

This sounds like either the throwout bearing is not being pushed far enough or the clutch itself is no good.

I would suggest replacing the master and slave cylinder. They are external and could be the entire issue.

Roy

Raise the vehicle on a hoist.

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2. Remove the hydraulic line from the slave cylinder.
3. Remove the slave cylinder.

Installation
1. Install the slave cylinder.
2. Install the hydraulic line.
3. Install the transmission.
4. Lower the vehicle.
5. Turn on the air suspension system, if equipped.
6. Bleed the hydraulic system See: Clutch Fluid > Procedures.

Clutch master

NOTE: When replacing clutch master cylinder, remove tubing from vehicle for bench bleeding procedure See: Clutch Fluid > Procedures > Clutch System Bleed.

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1. Disconnect the clutch master cylinder push rod from the clutch and brake pedal pivot shaft lever.

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2. Disconnect the Clutch Pedal Position Switch (CPP).

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3. Remove the pushpins.

4. WARNING: The electrical power to the air suspension system must be shut off prior to hoisting, jacking, or towing an air suspension vehicle. This can be accomplished by turning off the R.H. Kick panel area. Failure to inflation of deflation of the air springs which may result in shifting of the vehicle during these operations.

Raise and support the vehicle.

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5. Disconnect the clutch hydraulic line from the slave cylinder.
6. Lower the vehicle.

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7. Remove the clutch master cylinder reservoir and clutch master cylinder.
- Rotate the clutch master cylinder 45 degrees clockwise.

8. CAUTION: Clean all rubber clutch master cylinder parts with Ford High Performance DOT 3 Motor Vehicle Brake Fluid C6AZ-19542-AB or DOT 3 equivalent meeting Ford specification ESA-M6C25-A.