IIRC when reverse grinds, it is probably caused by the clutch cable, right?
Stretching a bit or the nuts loosened up? And of course the dreaded tube.... but lets not go there yet.
Have I remembered correctly?
Grinding in reverse happens because either the car is still rolling or the mainshaft is still turning. Mainshaft turning could be due to several things including bad clutch adjustment for one mentioned reasons, a warped clutch disc, pilot bearing seizing or not waiting for thin gear oil to slow the mainshaft before trying to engage reverse.
If you press the clutch pedal and then quickly shift to reverse, you will normally get a grinding sound. As ejm said, the parts are still rotating at that point, and there's no synchronizer on reverse to slow them down.
A "trick" you can try is to shift to a forward gear first, to stop the rotation, and then shift into reverse. Or, you can press the clutch down and wait 5-10 seconds to shift into reverse (friction will slow the shafts, if you give them time).
If, however, you try the shift-into-forward-then-into-reverse trick or try waiting a bit before shifting into reverse and still get the grind, then your clutch may be dragging a little. A dragging clutch will keep the parts from slowing down.
The two most common causes of a dragging clutch on a 914 are loose/stretched clutch cable or a loose/broken clutch cable tube. A warped clutch disk is another cause, but not as likely as the previous two possibilities.
Could be the clutch cable but possible the first/ reverse syncro.
Do the clutch adjustment, check the clutch cable tube for movement and see if the engagement fork is hitting the transmission body.
If the clutch is adjusted correctly than it must be the syncro.
Mike
MUCH BETTER
Without raising the rear end, I removed the top fill bolt for the tranz. nothing came out, so I added, probably a 1/2 pint maybe a bit more. Of course until it started running out.
Then I checked the clutch cable holding nuts. I found my old picture and there were about 4 threads showing both in the picture and on the car. So I don't think the nuts worked loose. I tightened the nuts for 1 more thread to show. Still had some play at the top of the pedal.
While on the test drive, I operated the clutch while my hand was in the tunnel, on the tube. No movement.
Clutch friction point seemed a bit higher. I let the oil temp get to 200 and tried a few R shifts.... NO GRINDING.
I guess next time I think the friction point is low, and I start hearing some R issues, I will replace the cable.
Thanks for chiming in. I think we got it.
Clark
Powered by Invision Power Board (http://www.invisionboard.com)
© Invision Power Services (http://www.invisionpower.com)