...Little help??

I have a 97 Gt Vert and have been noticing that when I start up, sometimes my car shakes a little in the transmission area. I also noticed that when I drive with flip-flops on that I can feel the same feeling under my right foot. It kind of feels like something is constantly rattling under my car when driving. Once when I was backing up, it felt like I had backed into something and I got out and nothing was behind me. I wasn't sure if it was my car poping out of gear or what. I never noticed this before until I had my cat-back and H pipe installed.My question is could it be that my tranny is giving out on me, or is their the possibility that I could have a broken mount somewhere? It is really expensive here in Hawaii to have peple just look at my car. We don't have an AutoZone out here where I could get them to see what kind of error code I am putting out. They want $95.00 just to hook it up! I thank you in advance for your help.

BTW my car only has 61,000 on it

Brandon :flag: