Seems every fall we have an issue with field mice in the barn where we store dad's old 1962 Volvo . They find a way to get in and chew the small wires and the interior upholstery . They do a lot of damage . The overdrive is now non operative as they chewed the wire to the solenoid that engages it . To repair it I will need to disconnect the drive shaft and lower the transmission in order to access the top of the transmission where the wire was chewed . We have tried just about every deterrent in the book but nothing seems to stop the mice . So more aggressive methods were in order .