There are a couple possibilities. First, the lockup torque converter could be stuck. It could be as simple as a faulty relay or it could be the torque converter itself. Second, it could be that the engine is not producing enough power to keep running when it's put into gear. For example, it could be idling fast because of a vacuum leak, but not really producing much power. When the transmission is engaged it could put enough power demands on the engine that it can't keep going.
check the soleinoid
A vacuum leak can do that. Check the gasket at the base of the throttle body for a vacuum leak.
Sounds like a vacum leak to me.
carb problems, adjust the idle screw and see if that helps
you need the fast idle adjusted on the engine you may have idle set where it sounds fine in idle but not high enuff when dropped in gear.
900rpm, and 600 rpms, respectively.
Driver error.
Anywhere from 18 to 21 inches. is normal.
Auto-choke is stuck open
autozone will scan codes for free.to see what is wrong!!
The most probable cause would be the idle control on the engine. When you put a car in gear, there is a "load" put on it (the transmission is using power) and the idle speed normally drops. The idle could be dropping to the point where it becomes unstable and causes the engine to vibrate.
good gear