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post #2 of (permalink) Old 02-10-2004, 02:18 PM
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Re: 88 2500 automatic?

From what I hear, the reason a tranny will switch between 3 & 4 in the city in OD is because when the engine feels too much strain, it makes the tranny shift down to accomodate for torque loss in the higher gear. Usually caused by large tires, or heavy loads. My truck doesn't do it much, just on the highway with a headwind. Hopefully someone else knows more about this.
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