My Vette recently had a dead battery, and after installing a new battery things seemed to work fine. One drive and all ok. A week later shifted to R and backed out of garage and let run in P awhile. When went to shift again, no engagement in D,R or S. Almost feels like shifter does not lock in gear selection. It moves fine to all selections, but no gear engagement. Anything common? Thank you.
First place I’d look is the linkage where it is linked at the tranny. (With engine off😏)
Suggest to start w/the standard diy’er battery/alternator voltage test. Before first start of the day the battery should measure about 12.6 volts. Immediatley after starting the engine, 13.5-15.5 volts. What do you measure?
If the shifter has lost its feel or its “detents” while is goes from P -R -N-D… the shift cable may have come uncoupled…either at the shifter in the console…or under the vehicle on the side of the trans-axle toward the rear of the vehicle.
Time to investigate if your shifter is actually moving the cable and selecting gears…or not. If it feels mushy or numb…chances are the cable broke or came unclipped somewhere. .