Changing differential gears
WWould like to hear from those that have actually changed their rear-end ratios. Did you get any improvement? Was it worth it? Any pitfalls?
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My experience was with a '99 Ford Superduty F250 with a V10 Supercab, 2WD. I changed out the 373 gears for 430's several years ago. We were towing a bumper pull that weighed around 7,500# loaded. Before the change, the engine would constantly downshift at even the slightest hill or need for acceleration. After the change the engine stayed longer in its sweet spot without dropping a gear so easily. It was expensive even for 2WD but I also added limited slip and it was like an entirely different truck handling wise. Probably not a great investment financially but for the grins, it was well worth it. Did I mention how much better the truck stepped out from a stop as well? Gas mileage didn't improve or degrade enough to notice.
