awhile ago and now recently at times when I punch it in first or reverse without enough gas something in my drivetrain slaps like a piece of metal breaking over a another...kinda confusing i know...it first happened bout a month ago going in reverse while turning felt/sounded like something just got "hung up" then popped over something else...i fear its something in the tranny cause i can feel it in the clutch/below my left foot...any ideas? the cv joints and all connecting/steering rods are fine. It happens once usually when its cooled down. I am scared its somethin major but it went away for a few weeks now its back. Help!