Hi, new to the forum. We have a 2014 Mustang GT 5.0 with an automatic transmission with 37,000 miles. We keep it parked in the garage under a tarp most of the time. We live in the Texas Panhandle where it does get cold in the winter. We went out to start it to charge the battery and the battery was dead. We put it on a tickle charger and the next day, it started right up. Decided to take it for a drive to help charge the battery and circulate the fluids.

I noticed when I put it into...

Transmission not shifting