* Clutch Issues: This is the most probable culprit. If the clutch isn't disengaging fully, the transmission gears will be difficult to shift.
* Worn Clutch Disc: The friction material on the clutch disc may be worn down, preventing complete separation of the engine and transmission.
* Clutch Cable/Hydraulic System: If your Probe has a cable-operated clutch, the cable could be stretched or broken. If it's hydraulic, there could be a leak in the system, low fluid, or a problem with the master or slave cylinder.
* Clutch Master/Slave Cylinder: These are common failure points in hydraulic clutch systems. A failing master cylinder might not push enough fluid, while a failing slave cylinder might not push the clutch fork sufficiently.
* Transmission Issues: While less likely than clutch problems, issues within the transmission itself could also cause grinding.
* Worn or Damaged Synchronizers: These components help match the speeds of the gears before engagement. Worn synchronizers are a common cause of grinding, especially in higher mileage vehicles.
* Bent Shift Fork: This part moves the gears within the transmission. If it's bent, it might not be engaging the gears properly.
* Low Transmission Fluid: Low fluid can lead to improper lubrication and gear grinding. Check your fluid level.
What to do:
1. Check the Clutch Fluid (if applicable): If your Probe has a hydraulic clutch, locate the clutch fluid reservoir (usually near the master cylinder). Check the fluid level and look for any leaks. Low fluid or leaks point to a serious problem needing immediate attention from a mechanic.
2. Check the Clutch Cable (if applicable): If your Probe uses a cable, inspect it for damage or stretching. A mechanic can check for proper adjustment.
3. Try Adjusting Clutch Engagement (if applicable): Some vehicles allow for clutch adjustment. However, this is generally best left to a mechanic, as incorrect adjustment can worsen the problem.
4. Get it Checked by a Mechanic: This is the most important step. Trying to diagnose and fix transmission or clutch problems yourself can be very difficult and potentially dangerous. A mechanic can properly diagnose the issue and recommend the necessary repairs. They'll have the tools and experience to determine if it's a simple adjustment, a worn clutch, or a more serious transmission problem.
Do not continue driving the car extensively with this problem. Forcing the gears can cause significant damage to the transmission, leading to costly repairs.