What does a broken clutch fork feel like on a Mazda RX-7 FD?

If your FD RX-7 has a broken or bent clutch fork, the primary symptom is that the clutch will not disengage fully. Based on the technical data, here is what that typically feels like:

• Stuck Clutch Pedal: The clutch pedal may stick completely to the floor, even after replacing and bleeding the hydraulic cylinders ¹.
• Inability to Shift While Running: You will likely be unable to put the car into gear while the engine is running. You might also hear a clunky or grinding noise when pressing the clutch pedal or attempting to shift ⁷.
• Normal Shifting While Off: Even though the car will refuse to go into gear while running, you will likely be able to run through all the gears smoothly when the engine is turned off ⁷.
• Floating Gears: Because the clutch fails to disengage the drivetrain, you may be forced to rev-match or "float" gears to drive the vehicle ¹.

Diagnosis Tip: To verify if the fork is the culprit without dropping the transmission, you can look through the transmission's inspection cover. Have a helper press the clutch pedal while you watch to see if the throwout bearing is being properly engaged and pulled by the fork.

Keep in mind that air in the hydraulic lines, a failing slave or master cylinder, or a destroyed pilot bearing can all mimic these exact same symptoms. Make sure your hydraulic system is thoroughly bled and the slave cylinder rod is properly seated in the fork socket before assuming the fork itself has structurally failed.