a little more progress has been made in that the SM420 has been washed, degreased, washed, scraped, degreased, rinsed off to the point I could paint. I also flushed out over and over the milkshake inside. Gears look good to my untrained eye, no chips smooth action. All clean now and will flush one more time with mineral oil after I run him for a few miles...one day!!

some before and after pics...
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1953 GMC 3/4-ton, deluxe cab, long bed
"My biggest project"
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