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Some solenoids that test ok on the bench, don’t work well on the car.  I believe many NOS parts that thus proved defective were merely returned to stock, rather than the manufacturer. I once built a special jig to bench test them, applying resistance to the shaft.

6 VOLTS/POS. GRD. NW INDIANA

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Try: Accessories/Literature..2nd page

6 VOLTS/POS. GRD. NW INDIANA

Thanks for the lead.  I didn't find anything in their on-line catalogue, but I'll give them a call.  Just more added knowledge on my part.

Sorry, lost track of my copy.  I’m sure CASCO likely still sells it.  If I remember, it just involves doubling (?) the circuitry/wires from the ignition switch to the solenoid, and converting the bullet connections there to double adapters, thus reducing the circuit resistance.

6 VOLTS/POS. GRD. NW INDIANA

Can you elaborate on the Service Letter recommendations?
Thanks
Mike
'55 Glasstop 6v OD

Go figure. I was recently reminded of the Product Service Letter advising additional wiring installation for 6V OD cars.  I ignored it as my OD typically worked ok.  Likely would have boosted current enough to overcome the occasional sticking.

6 VOLTS/POS. GRD. NW INDIANA

Go figure.  Overdrive worked perfectly all day yesterday.  If the solenoid IS ‘gummed up’ with accumulated lube, enough use must eventually loosen everything up (?).  Likely doesn’t help either that the original 6V system is strained by running at night with the brights on, on a cold night after the car was sitting for months.

6 VOLTS/POS. GRD. NW INDIANA

Right. Just looking for a simpler fix, to maybe avoid the effort/mess.  Guess I should bite the bullet and finally clean/install the original part.  The backup unit is working intermittently, even with everything thoroughly warmed up.
I'll also try Ted’s double-seal trick while I’m at it, though I’m not seeing any lube dripping from the solenoid now.

6 VOLTS/POS. GRD. NW INDIANA