Quote Originally Posted by KevinT707
No racing for me until I drop the tranny & find out if it's the tranny itself and/or clutch

Did the clutch clatter in neutral, and if it did, did it get louder as you put more miles on it? If so, my guess is that the splines on the clutch disk wore down them selves down aswell as the input shaft splines and now the clutch just spins around the input shaft. This is what happened to me the first time the sentra went down. I bought a shitty clutch, and it was recomended to me that I get an unsprung one since the springs in their sprung ones fall out. It clatered at first, but then got louder as it wore the trapizoidal splines into small sharp triangles on the disk and input shaft, which eventually turned into nothing. That happend within about 8k miles. I had to buy a new tranny and clutch. Got an open diff tranny and the same make clutch. This time I asked for a sprung one, they recomended a unsprung since the springs fall out. I told them I want the sprung one, because I'd rather have the clutch take a shit rather than the clutch take a shit and take the tranny with it. So I got a sprung one. Had a bit of clatter but was dampend by the springs. Over time the clatter got louder and after 10k or so took a shit. The splines were worn but not as bad. Though a spring fell out the clutch disc. Then as I just got the sentra up and running last week, I got an lsd tranny again, and rather then waste another 1500 on trannys and crap clutches and my time, this time I went with an exeddy. Runs perfect, sounds perfect, just like stock. Moral of my story is the clutches I went with which were the same as ACT, I believe had too lose tolerances between the disk splines and input shaft splines causing rapid wear and eventual failure of everything, which I believe happend to you. If I am not right, I'll buy you 2-3 gallons of 93.