rayshooks

I'm in the Bremerton, WA area and searched and searched for a 92' Civic w/ fairly low miles, and found one not but right around the corner from me. It's a 5 sp. w/ 115,000 mi. Body is in excellent shape (no rust) except for a ding in the hood and some minor work on the front drivers side quarter panel. It came w/ a brand new cam head, injun intake and torque bar. I drove this thing up and down the highway, downtown... and it drove (and it continues to drive) quite nicely. I'm not used to the manual tranny since i've been driving Jeep cherokee for the past 7 years or so. But what started happening about a day or so I bought the car was that when I'm say driving down a hill and going around a curve, sometimes it won't stay in 2nd gear... it'll just pop out. Can someone please educate me on this.