Guessing this is a manual transmission Deuce that you have?
I have seen some pretty well cobbled together linkage under those trucks. Where the linkage connects to the TC lever casting and at the TC itself are hardened pins with spring pins to hold them in place. Over the years...
I can't help but wonder if the linkage has anything to do with the problem. I have a completely different truck - and Low range would work just fine. Hi range wouldn't work until I adjusted and lubricated that linkage. Might be that a good shot of WD40 might solve the problem...
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