---
title: If I install new ring and pinion gears with a different ratio, do I need to do anything else?
description: Yes — after re-gearing, you'll need to recalibrate your speedometer.
---
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# If I install new ring and pinion gears with a different ratio, do I need to do anything else?
Yes — after re-gearing, you'll need to recalibrate your speedometer. An incorrect speedometer reading can cause ABS and transmission shifting issues. There are modules (such as one from Hypertech) that plug into the vehicle to recalibrate the speedometer for the new gear ratio.
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