If you don't regear your Jeep, you will eventually start to experience some issues. The most common issue is that your Jeep will start to crawl along at low speeds, and it will feel like the engine is working overtime. This is because the gears are no longer able to properly engage with each other, and they are slipping. This can lead to decreased fuel economy and a loss of power. In extreme cases, it can even cause damage to the engine or transmission. If you notice any of these symptoms, it's time to get your Jeep regeared.