A few more questions before I can give you a better answer -
a. does your car have fuel injection or a carburetor? (If you aren't sure: do you have to warm it up and or pump the gas to start it? If so, it's got a carburetor.)
b. Under what conditions do you have the problem? (Walk me thru a typical example - i.e. car cold/hot ... do you have trouble starting or restarting ... so forth)
c. if your car is carburated, it might be out of adjustment or dirty. If it's fuel injected, it may be as simple as dirty injectors or a small sensor bad/disconnected. You may need an engine diagnostic check.
Because reverse is a lower ratio gear than drive and puts less load on the engine.
Get new transmission
If you mean each time you engage car in any gear forward or reverse & it immediately stalls - you have a bad torque converter. Start engine, put foot on brake, put car in NEUTRAL, if it DOES NOT stall, but it does stall if you repeat this test when you put car in drive or reverse = bad torque converter - It's called a "stall test"
How would you get your car in and out of your driveway? How would you get out of a parking stall unless you pulled through and there was no curb or car blocking you? It is not uncommon to find yourself in a tight area where all you can do is reverse to get out while driving. I would say it is not safe.
I really doubt it's the tranny making your car stall, it's either carburetor problems or the idle is set too low.
A car might stall when shifting from park to reverse if the idle is set too low. It is also possible that the engine stalls because it is not fully warmed up before shifting from park to reverse.
There are several reasons that a car may stall only in reverse, the best way to narrow down the issue is to use a diagnostic tool. The diagnostic tool will show which sensors on the transmission may be malfunctioning enough to stall the engine.
it will drive but when in reverse it wont move
because your a failure and you obviously can't drive!
Drive...
No
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.