Need transmission problem diagnosis..., Or best guess Options

[Porsche Rescue]

Started my '70 tail shifter this morning, attempted to engage reverse and heardf/felt a horrible grind (kind of like the clutch pedal was not depressed, but it was). Quickly returned to neutral and tried again. I engaged reverse OK and backed out of the garage. But I heard a grinding/growling noise while moving and felt the sensation of something restricting movement (like brake on, but it wasnt'). Moved it back and forth in the driveway in all gears. It makes the same noise in all 5 forward gears as soon as I release the clutch. Reverse now seems almost OK.

Where do I start? Could it be a linkage issue (the front two bushings were new a few months ago)? It shifts smoothly when clutch pedal is depressed. Is something broken in the tranny? All opinions welcome.

[Porsche Rescue]

I first tightened the clutch adjustment nut as I had recently loosened it a bit. Then wiggled the fork. All seemed OK. Started car and shifted to reverse. Shifts fine, no grind. As soon as I begin to engage the clutch I hear the growl/grind. Backed out of garage. Shifted to first with ease, same noise when I engage the clutch. It truly feels like the transmission is fighting itself, sort of locked up. Car will move but not well and it sounds terrible.

I drained it and got nothing but very clean gear oil. Very little on the magnet and no sign of brass or other shavings in the oil. I should report that last August when I got the car I changed the gear oil (It was very low). I have only driven the car about 100 miles since so the oil is near virgin. During the 100 miles the clutch/tranny were fine. The car sat all winter as it needed engine trouble shooting and push rod seal replacement. Just finished all that and only drove it a few miles before today's experience.

Thanks, and keep the ideas coming.

[Jacob]

As soon as I begin to engage the clutch I hear the growl/grind. Backed out of garage. Shifted to first with ease, same noise when I engage the clutch.

You did not mention the fact that you get the noise when you engage the clutch before.

When you get the noise as you are trying to get it in gear, it usually indicates the clutch is not fully disengaging, or a synchronizer problem. When you get the noise as you are engaging the clutch it usually indicates the clutch itself has a problem.

This is pointing to the clutch itself, it might be coming apart. How many miles on the clutch. Any clutch work done recently?