Jk gear ratio chart

Put a chalk mark on the top of the tire and the top of the drive shaft. Jump to Latest Follow 1 - 8 of 8 Posts.

Jeeping 201 Gearing Truck Tyres Jeep Automotive Mechanic

We are a new forum dedicated to the 2007-2012 Jeep Wrangler JK driven by.

. Put the transmission in neutral and spin the rear wheels. If i choose a 513 ratio that means the pinion is turning 513 times for every 1 time your ring gear turns. Or input the manual numbers from the above post Step 2.

38 jk gear ratio charts. A somewhat normally geared Jeep running a 383 gear and a 272 low gear ratio along with a standard axle gear ratio of 373 is multiplying 383 times 272 and 373 to arrive at. The last field is the gearing options.

If you have an automatic transmission your RPM will higher due to. Count the number of times the drive shaft. You will need to fill in the fields based on your desired setup.

Gear ratio chart 2012 Auto. Gear Ratio and Tire Size Calculator - 4x4 and Jeep Ring Pinion. 2013 JK gear ratio chart.

How to use the calculator. From experience and friends it seems that 456 is a good manual final axle ratio and 538 07-11 or 513 12-up for the Automatics on 35s 37s and up require a ratio bump in. The old 4 speed is the Dodge 42RLE the new tranny is listed as the Dodge NAG1.

Remember the ratio is pinion to ring gear. Make the necessary changes to your speedo by replacing your Jeep Speedometer Gear. A basic method to calculate is to mutiply 12 by your tire diameter.

In order to get the best ratio for your Wrangler you. Joined Sep 28 2011 55 Posts. Or you can think of it as your.

12 X 38 456 The below table. When you change your tire size you need to make sure you have the right gearing to get optimal fuel economy and power. Around The Campfire.

Enter 1 for High and either 4. This chart is based on 65 MPH and a gear ratio of 11 on a manual transmission in 4th gear.

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