Originally Posted by mike02gt
I'm assuming your down shifting from 3 to 2. What RPM's are you down shifting at? If your car is "jerking" obvious answer would be that you're letting out the clutch too quick. In terms of how high you are supposed to rev.. just give the throttle a little blip. Again, depends on your speed, gear, current rpms, etc.
I'm usually in 4th going to 3rd and going about 30-40 mph. RPM is around 3-3.5k in 4th gear. This is for situations where I am coming to a stop light and need to get acceleration when traffic is starting to move again by the time I get up to the traffic.