Hi Jr, I am pleased to assist you. This rear driveshaft is specifically designed for vehicles with a 145.0-inch wheelbase and is compatible with rear-wheel drive automatic transmission models. Whether it is the same part for a 2-door and a 4-door configuration depends on the specific vehicle model and year. I suggest calling our parts specialists at 1-866-529-0412 during office hours to provide the vehicle information so we can help you look for the right part. Have a good one.