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.
no it will cause u 2 go > slowly >=forward
check the idle speed with the car in gear, if it has a tac on the dash it should idle in gear at about 700 rpm if its too low the car will vibrate or stall.
wuz your car still mouving foward????
A vehicle will shake in the reverse function when there is an issue with the engine, although other issues could cause this issue as well.
A vehicle will shake in the reverse function when there is an issue with the engine, although other issues could cause this issue as well.
It could be your motor mounts (usually always slightly vibrating the car, especially when accelerating) or most likely not aligned/damaged driveshaft on rear wheel drive vehicles.
Out of balance tire, bad tie rod, bad shock/strut, or bad alignment are a few options
they are overtorqued.
Cracked electrical wire caused this to my car once.
who would buy a $1.7M car that doesn't reverse
Its not in reverse gear.
Who's car? if you mean why does a car not reverse sometimes, its probably due to failure in the gears.