couple of problems

[j{}n]

first we'll start with the dancing speedometer. whenever i go anywhere over 25mph, it jumps back and forth, making it impossible to tell how fast i'm going.

second we have the buzzing sound whenever i hit 2200 rpms. it sounds like the buzzer you hear on a gameshow when you get an answer wrong. only at 2200 though, nothing when over/under.

third, whenever i accelerate, my car keeps jolting. first it'll jerk forward like i just stomped on the gas, then it'll jerk back like i just downshifted (even though i have the automatic).

any ideas?