When engine or into gear car starts shaking badly

the motor mounts are probably bad. pop the hood and start the engine. Put it in gear and back in park several times. If the engine moves more than an inch or so, the motor mounts are bad

Possible but highly unlikely. Sounds like a dead miss.

BAD SPARK PLUGS AND WIRES DIRTY FUEL INJECTORS AND STOPPED UP FUEL FILTER OR WEAK FUEL PUMP WILL CAUSE ENGINE TO SURGE.

Sounds like its missing on 1 or more cylinders. A check of the plugs and wires is in order, Could be a fouled plug or a loose/bad sparkplug wire. Best of luck.
Greg

Sounds like a bad motor mount, pop the hood and see if the motor shakes or moves rapidly when u put it in gear holding down the brake.

IF GEAR SHIFT SHAKES THEN THE TRANSMISSION MOUNTS COULD BE BAD. HOPE THIS HELPS. GOOD LUCK

The problem is the torque converter solenoid. I had it happen on my 94 Cavalier a few years back and was a cheap fix at the local car mechanic. What happens is the transmission warms up and hits a certain speed where the solenoid engages, but then it sticks and won't disengage until it cools down sufficiently. When it sticks, it causes the car to shake when slowing down and will snub out the engine if you come to a stop.

.how to set the timing on a 2000 ford sescort zx2 and why does it idle rought it a dual kam 2/0 timing belt broke and the engine was fixed in a shop but i dont think they know just how to set the timing right when im going up hill and the car shifts back the engine reves up to about 3000 rpms the engine sounds lick it is pinging real loud sounds like it not set right

What car , and year and engine? What color smoke?

Good Day,

The shaking can be caused by a bad motor mount, but could also be caused from the engine when it is idle'ing low and about to stall. The motor mount would also shake the car under braking, so if is doesn't shake whiIe your braking it's probably not motor mount, Is your check engine light? The idle air is another possibilty among other things. I can assist further but I need to know which engine you have the 4 cyl 2.0L or 6.0 cyl 2.5L?

Let me know about the check engine light aswell.

Hope this helps