Re: Rear Spring
In 1936 a hollow center bolt was introduced along with grooved leaves, the center bolt nut has a "grease fitting", it was for spring lube not chassis grease(see page 383 of the service bulletins)
Ford M-4628 spring lube---
77-1/2% ice machine oil (about 10 weight or atf)
20% talc
2-1/2% pulverized asbestos (today that might be hard to find, perhaps graphite would be good)
shake well before use
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