Hello... As a relatively new person, this is my first post here. I have a problem with a "new" project truck I recently bought. It's a '79 Chevy with the SM465 manual transmission. This is also the first stick shift I've ever owned. I've noticed that often, the tranny grinds when I put it into gear, even through the clutch is all the way to the floor, mostly when going into Low 1st or Reverse. After a few seconds of still holding the clutch in, and trying again, it'll then almost always go into gear ok, no grinding. This surprised (scared) the crap out of me the first few times. Another thing I noticed is that when taking off in 1st gear, there's a point where the truck will shimmy and jerk somewhat, then smoothen out, at about 1/3-way through releasing the clutch. It only lasts for a couple seconds, then is ok. I changed the gear oil, and that hasn't seemed to help any. Anyways, being that this is the first manual tranny truck I've ever had to deal with, I was wondering if anyone has some suggestions as to what the problem might be?.?. Tranny problem, or maybe the clutch?.?. Both?.?. Any insight or help would be greatly appreciated. Thanks!!