Kinda late here, But I have a 1990 Dodge w250 with an NP435 granny 4 (and likely 4:10 gears in the diffs) and I never take off out of first unless I'm ripping small trees out of the ground. 1st is like 6:1 or something ridiculous like that. It even says in the manual to take off out of second for normal driving.
I'm also not crazy about the old 4 speeds. my truck is at 3000rpm at 65mph in 4th.
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