Heard a loud pop now it will only shift into reverse. What could be wrong?

Hi, this is Bo, an auto expert on RepairPal's Car Genius team! Hearing a loud pop before losing all forward gears sounds like your Jeep’s transmission had a catastrophic failure. It could be something dramatic, like a snapped internal component (say, the input shaft or planetary gearset), or less dramatic but equally inconvenient, like a busted shift linkage or valve body failure. If it only goes into reverse but not drive, your transmission isn’t engaging the forward clutch packs properly, which isn’t exactly "good news." First step? Check the transmission fluid level and condition. Burnt-smelling, dark fluid or metal shavings on the dipstick mean trouble. Beyond that, a transmission shop will need to diagnose whether it's an internal issue or a linkage problem. Either way, this one's not fixing itself—plan for a tow. If you need any further advice or want help finding a trusted RepairPal shop in your area, please feel free to call us at 877-913-1554.