Earlier this year I had a Fairey overdrive unit installed in my '73 Series III. The guys who installed (who I trust on things automotive very much!) told me to only use the overdrive in 4th gear...meaning I've been shifting in and out of the overdrive when I come to a light on the highway. Do you have to take the truck out of overdrive to shift back up through the gears or can you leave it in. I know this may be a dumb question...but I suppose the only way not to be dumb anymore is to ask!
Chris
Chris
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