have a charging issue when car is in drive...when in park or neutral charging is good...14.1 volts... when put in drive it goes down to normal voltage 12.5 volts ..when you start slowing down to will stop,
it will slowly come up in volts but up to 14..if you put it in neutral ,bk to 14.. after a long drive voltage continues to drop..to 12.1..so not charging..put it in neutral or park, back to 14...new alternator and good battery.. it has been going on for a year...