There's a rumbling noise when I shift into reverse (only reverse). What is causing this?
There is a technical service bulletin (TSB) that may address your concern. It is # TSB2735R and it states that the automatic transmission control cable assembly can cause a rattle noise in reverse. The fix is to secure the cable with a zip tie. I suggest you have a trained professional, such as one from YourMechanic, inspect your vehicle’s noise firsthand to determine if the TSB applies.