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Jeep Wrangler JK
JK General Discussion
Question about upgrading headlights to H4 bulbs
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<blockquote data-quote="Ballermaris" data-source="post: 425151" data-attributes="member: 18206"><p>Do be VERY, VERY, careful with the tool. You could turn the Wrangler into an expensive paperweight. The HALO will hook into the headlight wiring.</p><p></p><p>There are a number of settings in the tool that are interesting, including setting the transmission to Tow/Haul for the duration of a tow for example. (It also changes the shift points and will give you some extra 'grunt' power on takeoff.)</p><p></p><p>The Tow/Haul is for speeds of around 65-70 MPH, no higher. Your RPMs can get off the chain if using the wrong tire size or gear ratio.</p><p></p><p>The Tool will allow you to properly set the tire size and gear ratio for the Jeep. Many stock Wranglers came out of the factory with 3.21 ratios. If you throw on tall tires, for example, it will throw off the speedo/mileage in a considerable manner and you will soon become fast friends with your local favorite Smoke Bear Trooper.</p><p></p><p>If you throw on tall tires, you have GOT to change the ratio's in the pumpkins. There are threads with charts for tire size and gear ratios on the forum.</p><p></p><p>You can use the VIN checker to determine original ratios.</p><p></p><p>If you have an absurdly older Jeep with tall tires and low mileage, she is likely never been properly programmed. That will make it hard on the transmission too.</p></blockquote><p></p>
[QUOTE="Ballermaris, post: 425151, member: 18206"] Do be VERY, VERY, careful with the tool. You could turn the Wrangler into an expensive paperweight. The HALO will hook into the headlight wiring. There are a number of settings in the tool that are interesting, including setting the transmission to Tow/Haul for the duration of a tow for example. (It also changes the shift points and will give you some extra 'grunt' power on takeoff.) The Tow/Haul is for speeds of around 65-70 MPH, no higher. Your RPMs can get off the chain if using the wrong tire size or gear ratio. The Tool will allow you to properly set the tire size and gear ratio for the Jeep. Many stock Wranglers came out of the factory with 3.21 ratios. If you throw on tall tires, for example, it will throw off the speedo/mileage in a considerable manner and you will soon become fast friends with your local favorite Smoke Bear Trooper. If you throw on tall tires, you have GOT to change the ratio's in the pumpkins. There are threads with charts for tire size and gear ratios on the forum. You can use the VIN checker to determine original ratios. If you have an absurdly older Jeep with tall tires and low mileage, she is likely never been properly programmed. That will make it hard on the transmission too. [/QUOTE]
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Jeep Wrangler JK
JK General Discussion
Question about upgrading headlights to H4 bulbs
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