I put in a stock 2.0 Protege. Turns out it was my pilot bearing even though I blew a seal it didn't damage my transmission. I'm in the process of tearing the old one I bought out and reinstalling my original transmission. I thought it was my transmission whining, but it turned out to make the same noise after I installed the new/used tranny. So yes I wasted 7-8 hours in the process. The only benefit, is I'm becoming fast at switching transmissions. It will take me about 4 hours this time I suspect.