Here at JeepHut we have a made an easy to read chart to help you decide what is on the best gearing for … mounted diameter) with 3.55:1 axle ratios. Differential Gear Ratio. I have a few questions: 3nd. A frequently asked question we hear is “What is the proper gear ratio for my tire size?”  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. Jeep Wrangler JL Showcase. Solve for your Transmission Ratio. Custom ARP Head Studs designed for the 3.6 Pentastar, Turbo Jeep Off Road: Performance Overview | Prodigy Performance. When you change your tire size you need to make sure you have the right gearing to get optimal fuel economy and power. If your tires are bigger than stock you probably, like myself, have spend a lot of time trying to WAG (wild ass guess) your actual MPH when going down the road. The gear ratio most interesting to 4x4 truck owners is the ratio between the driveshaft and axles - the differential gear ratio or axle gear ratio. Rough Trail Sye Kit and Heavy Duty 1310 CV Driveshaft Package. What elevation levels are you referring to in “higher elevations”? This calc can be used to find a new gear ratio. Example: A Wrangler YJ with 225/75R-15 tires (28-in. The owner wants to run 33x12.50R-15 BFG MTs (32.5-in. ... Gear Ratio Chart. Hi Trae, Yes with the 3.8L and the 42RLE Transmission a 5.13 Gear would be Ideal with a 35″ Tire and our Turbo system! (CROSS SECTION WIDTH x 0.ASPECT RATIO x 2 ÷ 25.4) + WHEEL DIAMETER = OVERALL TIRE DIAMETER Revolution Gear & Axle Dana 30 Front Axle/44 Rear Axle Ring and Pinion Gear Kit with Master Overhaul Kit; 5.13 Gear Ratio (07-18 Jeep Wrangler JK, Excluding Rubicon) 5.13 $604.80 1.25. It is controlled by the number of teeth on the ring vs. the pinion. All rights reserved. Jeep Commander Articles and Reviews ... Gear Ratio: Okay, so you've torn your pumpkin apart and have the ring gear and pinion gear teeth count. Would that be ok with the turbo setup? Just type in your info, press calculate, and you'll get the right ratio without the guesswork. Here is a chart that shows optimal gear ratios for lifted Jeeps with larger tires. […] proper tire to gear ratio. A good way to calculate this is to multiply.12 by your Jeeps tire diameter (Example:.12 X 38" = 4.56). ... Jeep JK; 1991-1996 Jeep 4.0L; Toyota Land Cruiser FJ Series; 1997-2004 Jeep 4.0L; Interior. 1987-1995. For example: 41-tooth ring gear ÷ 10-tooth pinion gear = 4.10. The gears felt tall even in the 4:10 axle ratio JLUR I test drove. Offroaders.com Life begins where the pavement ends. Recommended to you based on your activity and what's popular • Feedback SOLUTION Spicer ® ring and pinion gearing for the Jeep ® Wrangler JK offers the benefits of … 1.72. Write us! Solve for your Crawl Ratio. GEAR. JK Gear Ratio's . Gear Ratio and Tire Size Calculator - 4x4 and Jeep Ring & Pinion When you change your tire size you need to make sure you have the right gearing to get optimal fuel economy and power. With 35 tires an 3.73 final drive. (Old Gear Ratio X New Tire Size)/ Old Tire Size = New Gear Ratio Then you’ll just need to round up to a standard gear ratio. Next find your new tire size and follow that across to the closest RPM to your original and that will be first choice. The Ultimate Crawl Ratio Calculator. 6nd. When you change your tire size you need to make sure you have the right gearing to get optimal fuel economy and power. Crawl Ratio = Transmission Low Gear x Transfer Case Low x Differential Ratio i.e., 6.68 x 2.46 x 4.88 = 80.2 RPM = (mph x transmission gear ratio x axle gear ratio x 336) / tire diameter i.e., (65 x 1 x 4.11 x 336) / 33 = 2720 rpm With a Jeep with … The left side of the calculator requires all three entries. PROBLEM “I know I’ll need to change my gear ratio when I modify my Jeep ® Wrangler JK, and I want to be sure that my upgraded gearing is high quality—and even better than before.”. I hope this helps answer those questions. 2007 Jeep Wrangler JK Jeep Wrangler JK Specs. Jeep Wrangler TJ Showcase. Current Top Sellers. JavaScript seems to be disabled in your browser. I have a jk 3.8 auto and was considering the turbo route. Great questions feel free to contact us directly as well. © 2018 Prodigy Performance. A 4.10:1 gear ratio, for example, would mean that your driveshaft would have to spin 4.10 times to spin the wheels once. Questions? Hummer H3. Jeep Gladiator JT Showcase. Jeep Wrangler YJ Showcase. A ratio of 4.56 means that as the axle turns one whole circle the driveshaft turns 4.56 circles. 1945-1986. Hi Matt, we have many customers living out in mountain states so elevation could be 11-15k feet, a lot of times when living in states like this during travel it would not be uncommon to see a 5K+ foot change in elevation while driving. Some of … 2007-2018. In regarding the Proper Gear ratio chart the 2288 or the other 4 digit numbers that is referring to the RPM the vehicle would be in at 70 mph. 2007-17 Jeep Wrangler: 2018 & UP Jeep Wrangler Requires Security Bypass Module: Tire Size - Manual: Tire Size - GPS / Automatic: TPMS Enable / Disable: TPMS Threshold Change: Axle Gear Ratio: Transfer Case Gear Ratio: Rubicon Swaybar: Rubicon Lockers: Electric Steering Pump: Front Axle Disconnect: … Jeep JK Front 1310 CV Driveshafts; Jeep JK Rear 1310 CV Driveshafts; Jeep JK Front & Rear 1310 CV Driveshaft Package; Jeep JK 1350 Driveshafts. In reference to “changing elevations”, how much of a difference in elevation are you referring to? 1st 2nd. The charts I found ranged … ... Gear Ratio Calculator. 1997-2006. R. RATIO. So while the calculator gives you the 4.38 ratio the closest real gear set is 4:56. 1. There is a direct correlation between tire size and the gear ratio. Jeep JK 1310 Driveshafts. 4nd. TIRE SIZE CHANGE CALCULATOR. Save yourself the headache and let us figure out your ring-and-pinion gear ratio! Ian shows you how to find the effective gear ratio on your vehicle when you upgrade to bigger tires with this equation on a PowerNation Extra tech tip. 3. Jeep CJ Showcase Bigger tires can help you crawl up those slick rocks, look cool, and rob you of power. 2. 32.5/28 X 3.55= 4.12. 0.84. That is what the red box in the top left corner is referring to when it says 70 mph RPM range. After searching and talking to the people I came upon the understanding that nothing seemed to match. This form allows you to calculate final drive ratios as well as see a comparison of speeds and RPMs within operating ranges of the vehicle. 2.1: Jeep JK Lift Pics 2.3: Jeep TJ Lift Pics 2.4: Jeep LJ Lift Pics 2.5: Jeep YJ Lift Pics 2.6: Jeep CJ Pics Wrangler Info. Off-road drivers and rock crawlers build their vehicles with low (numerically high) crawl ratios because not only does that increase torque at the wheels, it allows for better throttle response for low speed, technical driving. If you know your gear ratio and tire size you can get a fairly close idea here. I have a set of 5.13 in the garage. 5.1: LJ or TJ Shift Linkage 5.2: Jeep Wrangler Undercoating 5.3: Stuck Oil Filler Cap 5.4: Grease … This page is a Differential Gear Ratio Chart for comparing tire size to axle gear ratio and the combined effect on power and fuel economy.About this Engine RPM. The nearest available ratio is 4.10. Part #: This started by me trying to find a good gear ratio chart for my JK. And here's a formula that you can use to calculate your vehicle's rear axle gear ratio: Solve for your Transfer Case Ratio. View All; Lokar; Apparel. Enter your new tire diameter, your old tire diameter and your present gear ratio to find out your new gear ratio Convert P-Metric Tire to Tire Diameter Inches Convert the funky P-Metric Tire # (Example: 195/75R15) on the side of your tires to Inches, so you can use more of these rearend calculators! 2288 what?? mounted diameter). This calculator will give you the gear ratio, just plug in the numbers. For Example: 235/45ZR-1 (235 x 0.45 x 2 ÷ 25.4) + 17 = 25.327" $489.99 $469.95. Ring Gear/Pinion Gear Teeth to Gear Ratio 5nd. View the results of endless combinations of transmissions, transfer cases, axles, and tire size combinations. The Rubicon get the new Dana 44 both front and rear and comes only with the beefy 4.10 ratio. One way to compensate for this is to swap out your differential gears. This can quickly be assessed and confirmed by visiting our article on Proper Gear Ratio Tire Size. In general, you’ll want a ‘taller’ or smaller gear for highway driving and a … What are the numbers in the middle of the chart referring to (i.e., the 3.6l automatic with 33″ tires with a 4.10 gear ratio corresponds to “2288”)? 2018-2021. This calculator is useful for planning your rig, allowing you to see what kind of performance to expect from different combinations. 1. 50-5915. The right side will show the results. In addition to the tires and gears, you can adjust the engine RPM to find your ultimate crawl ratio, or a balanced blend of on-road and off-road performance. I found different opinions on where the power was, how it was calculated, and even preceived. The stock gear ratio tends to vary depending on the year and package your Jeep has. Engineered for Longer Life and a Smoother Ride. Here at Alloy USA we have a made an easy to read chart to help you decide what is on the best gearing … 2.61. With the 3:44ish ratios in the Sport, I might not be using 6th gear very much. RING GEAR TOOTH COUNT ÷ PINION GEAR TOOTH COUNT = GEAR RATIO A good way to calculate this is to multiply.12 by your Jeeps tire diameter (Example:.12 X 38" = 4.56). New Tire Diameter/Old Tire Diameter X Original Gear Ratio = New Ratio. Final drive ratios include 3.45 and the optional 3.73. ... 2018 ] 5 great, inexpensive upgrades for your Jeep JK Cheap Tricks and Useful Tips [ February … 4.46. 4.06. Remember that the 1st gear is improved on both new transmissions, so responsiveness and feel would be improved of the line and getting tires moving, but the system load at 1:1 @ speed (65 or 70 depending on which version) that the charts focus on wouldn’t really change, other than the stock 3.21 & 3.73 options have been replace with the single 3.45 axle, but comparing like for like ratios … Jeep Wrangler JK Showcase. By doing so this will allow your Jeep to produce the most efficient and optimal power when […]. (most calculators I have seen put it at 4:88 for 35s, try a few, also try asking on JKBoard.com and JKOwners.com for more input). You must have JavaScript enabled in your browser to utilize the functionality of this website. 1.00. The ratio is calculated by multiplying your transmission, transfer case, and ring and pinion gear ratios. 4.1: Jeep Wrangler Unlimited 4.3: Jeep Wrangler TJ Wrangler Repairs. Hey guys, Welcome to Alloy USA - 10 Year Axle Warranty - 5 Year Ring & Pinion Warranty, Here's a formula you can use to calculate your vehicle's tire diameter: Toyota Truck gear reduction housing to the Jeep Dana 300 and Atlas transfer case $ 582.27 … Using the chart below, first determine your original gear ratio and tire size and follow to the intersection that should be your approximate RPM at 65 MPH. Home; Wrangler Lift Pics. A good way to calculate this is to multiply.12 by your Jeeps tire diameter (Example:.12 X 38" = 4.56). Is what the red box in the 4:10 axle ratio JLUR I test drove started by me trying to a. You crawl up those slick rocks, look cool, and you 'll the... For my JK just type in your browser to utilize the functionality this. Can get a fairly close idea here JK Jeep Wrangler Unlimited 4.3: Jeep Wrangler TJ Wrangler Repairs to! Jeep Off Road: Performance Overview | Prodigy Performance, you’ll want a ‘taller’ or smaller for... 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