Delco Wonderbar Mystery

[DavGoodlin]

Most of what I know about Wonderbars came from reading Autotrader, Hemmings and similar ads for classic cars. They seemed to be in Corvettes more than anything else.

Its nice to know more were made and I could get more to restore, since this one came to life easily.

After replacing the missing and the weak/shorted tubes, the 8 wax capacitors and electros, it really received exceptionally well and sounded good for a Delco radio of any vintage.
I was using my 120 foot outdoor wire antenna stretched between two trees, so maybe a 30 inch car antenna may not work as well.
When the bar was pushed the first time, it muted and the motor moved tuner ahead, but not to an active station. Each time after that, it wouldn't advance much, but trying like it was not getting enough voltage.

I was afraid to just start applying lithium grease all over the tuning mechanism, figuring there was a prescriptive method. The tuner seems to operate freely enough.

Is there a method to lubricate these worm-gear motors?