Not so fast, formally known as Solved
Bad antenna solder connections on the board.
After tearing down the module I could see where the solder was cracked around 3 of the 5 connection points. The module is mounted solid and no stress on the connector but it is 10 years old. I warmed up the iron and remelted the connections. That did it!
Now to swing a deal when it's up...
Seems the module may have some more bad solder joints. Radio fine sitting still but driving it cuts out bad. Back to channel hopping or with a 6 disc system I can at least have my own play list.