I have a 99 classic....nothing special....4.0 AW4 yada yada....starts up great....but on acceleration, the engine starts bucking erratically and my RPM gauge goes nuts.....starts "flicking" everywhere. Sometimes the engine shuts off and i need to restart....and lately my trannys shift points are different....higher shift points on low gears.....i have no idea what this could be...any ideas? I also know that my Clock spring is bad....not sure if that ties in with this....