Replacing our only car

We are trying to raise money to come up with enough for a down payment for a car. Our transmission is going out. So we can’t use our reverse gear which means we’ve been pushing the car alone. This is the only car in the household so is hard as door dash driver to have to push this car every 20-30 minutes. Good news Steven found a job. But because of not being able to find a job through this pandemic and only being able to do delivery our down payment went higher than we expected. We really need this to keep a roof over our heads, keep our children clothed and fed also. We normally take care of everything no matter how hard but we have hit a very big wall. We don’t ask for much. Any help would be appreciated, prayers too!