When do you change the gear ratio on a jeep?
When you change tires on your Jeep from the stock size to the larger tires to give your lifted Jeep the look you want, a change in gear ratio is necessary to give you the optimum power ratio. There is a direct correlation between tire size and the gear ratio. Here is a chart that shows optimal gear ratios for lifted Jeeps with larger tires.
What should gear ratio be for 36 ″ tire?
For example if I go to a 36″ tire, I would want to be right at 4.88. That would give me lots of gearing for mud and hill climbs, decent power at a higher RPM on the highway, and the usual horrible MPG like I expect out of my jeep (only worse than stock)!
What kind of gearing do I need for my Jeep?
That would give me lots of gearing for mud and hill climbs, decent power at a higher RPM on the highway, and the usual horrible MPG like I expect out of my jeep (only worse than stock)! Stock gearing in my jeep is 3.07, and the stock GSA tires are about 28″ in size. 27.7″ x 8.5″ to be exact.
What’s the crawl ratio on a jeep TJ?
Also keep in mind that this is a general chart. It does not take into account what transfer case you have.. If your TJ is not a Rubicon you will have a NV231 t-case and 2.71:1 crawl ratio. If you have a Rubicon you have a NV241 t-case and a 4:1 crawl ratio. This has a very big effect when you are wheeling in 4-low!
When you change tires on your Jeep from the stock size to the larger tires to give your lifted Jeep the look you want, a change in gear ratio is necessary to give you the optimum power ratio. There is a direct correlation between tire size and the gear ratio. Here is a chart that shows optimal gear ratios for lifted Jeeps with larger tires.
What kind of gear set does a Wrangler have?
Wranglers that are equipped with the Rubicon package typically come with the 4.10 gear set in their Dana 44 axles. The chart below shows the relationship between gear ratios and tire size. The numbers across the top are gear ratios, the numbers down the left side are tire sizes in inches, and the 4 digit numbers in the white boxes show RPM.
For example if I go to a 36″ tire, I would want to be right at 4.88. That would give me lots of gearing for mud and hill climbs, decent power at a higher RPM on the highway, and the usual horrible MPG like I expect out of my jeep (only worse than stock)!
That would give me lots of gearing for mud and hill climbs, decent power at a higher RPM on the highway, and the usual horrible MPG like I expect out of my jeep (only worse than stock)! Stock gearing in my jeep is 3.07, and the stock GSA tires are about 28″ in size. 27.7″ x 8.5″ to be exact.