Well I went to move my car out of the garage to put it in the sun for some mor pics and then I put it in reverse and suddenly new something was wrong

Instead of my trans brakeing in park this time it broke in reverse wich sucks cause my ebrake doesnt work, so I turned the wheel to the left and it stopped turned the car off and ran like hell for some blocks to put under the tires

The good news is I have a waranty on the work what they did when it happened the first time! But I was wondering if a aftermarket shifter like a dualgate would fix the problem of getting stuck in one gear or not?