Pulled the retract motor apart. Found the gearbox at the end of it full of 50 year old grease. Although it wasn't dried out, it wasn't exactly fresh. Took an awfully long time to scoop, scrape, and force the grease out. It was tough to get out from underneath the central gear and shaft. I put it in a varsol bath to get the last of the grease out. Unfortunately the varsol also removed the 1960's era hammered finished paint. Check out the beautifully machined gears and casting for the gearbox though. This motor and gearbox assembly is one-off so I have to get the retract motor working properly. Once the gearbox was fully cleaned, I filled it back up with fresh grease and reassembled.