My daughter got stuck in a snowdrift and now has no reverse. on 2008 Dodge Grand Caravan

What could it be? She still can go forward. There is no noise involved ei:clunking or grinding

Get Your Car Fixed at a RepairPal Certified Shop.
We certify shops based on expertise, quality work, and verified customer reviews
2 answers
get diagnostic run. still under warranty? could be useful.
scan for trans codes and post so we can adv