They came with either a 3.21 or 4.10 gear ratio.

......................1993-95: 151.9 in. The stock gears in a 2.5L YJ are 4.10 ratio.

(CROSS SECTION WIDTH x 0.ASPECT RATIO x 2 ÷ 25.4) + WHEEL DIAMETER = OVERALL TIRE DIAMETER For Example: 235/45ZR-1 (235 x 0.45 x 2 ÷ 25.4) + 17 = 25.327" And here's a formula that you can use to calculate your vehicle's rear axle gear ratio: RING GEAR TOOTH COUNT ÷ PINION GEAR TOOTH COUNT = GEAR RATIO track =. The gears in my rear are going out, since they have to be fixed anyway might as well do it correctly to run the 31" tires.

All YJ's feature a leaf spring suspension and solid axles. A good way to calculate this is to multiply .12 by your Jeeps tire diameter (Example: .12 X 38" = 4.56). ... ExtremeTerrain provides Jeep and Toyota enthusiasts with the opportunity to buy the best Jeep Wrangler and Toyota Tacoma parts at one trustworthy location.

Gear Ratio And Tire Size Calculator When you change your tire size you need to make sure you have the right gearing to get optimal fuel economy and power. (.12 X 38" = 4.56) The below table can be used to get a rough idea on gear ratios. But since it is more of a trail toy … If 3:88, goin to 4:45. Dana 35: This was an axle size used on most Jeep rear axles.

The width of the axle shafts is 1.13 inches. overall length = 1987-89: 152.6 in. You can't tell me that 3.55 gear ratio he recommended for his 33's will end up driving well or even close to it. ......................1990-92: 153 in. Stock gear ratios will vary for a Jeep Cherokee depending upon the size of the motor. Motive Gear Dana 44 Rear Axle Ring and Pinion Gear Kit; 3.07 Gear Ratio (87-06 Jeep Wrangler YJ & TJ, Excluding Rubicon) 3.07. Well, you don't have a Rubicon, so you definitely do not have a 4.10 gear ratio.

If you are interested in a change that will give more power or better fuel mileage use the color coding as a guide.

Next find your new tire size and follow that across to the closest RPM to your original and that will be first choice. Show Full Signature '87 YJ, 4.2L built and bored, 8" of lift, 8.8 rear, AX15/NP 231J, Tom Woods drive shafts, Flat fenders, 12,000LB winch, Custom bumpers, Rattle can paint job.

The YJ is the only Wrangler to have "square" headlights. A good way to calculate this is to multiply .12 by your Jeeps tire diameter (Example: .12 X 38" = 4.56).

The stock gear ratio tends to vary depending on the year and package your Jeep has. overall width = 66". Show Full Signature

$187.60. 99 sahara unk: 4.0/np231/ax15/d30/d35 flowmaster40,hpd30 with aussie locker,currie upper joints,4.88's, lca skids,chromo shafts,vanco brakes,d35 with super 35 and arb locker,re 4.5" springs,currie arms,re front uppers,Re shocks in back,walkerevens shocks up front, Re track bars with currie jj joints,anti rock,ss brake lines,re rear sway bar links,jks 1.25" bl and mml,bfg 35x12.5 …

Make the necessary changes to your speedo by replacing your Jeep Speedometer Gear.

If your window sticker does not say "Max Tow Package - $745 " or "3.73 Axle Ratio - $495," then you have a 3.21 gear ratio. A good way to calculate this is to multiply .12 by your Jeeps tire diameter (Example: .12 X 38" = 4.56). Dimensions. A basic method to calculate is to mutiply .12 by your tire diameter.

wheelbase = 93.4". Some of the possible ratios include 3.07, 3.55, 3.73, and 4.10. There is a direct correlation between tire size and the gear ratio. Dana 44: These are the beefier axles found on the rear of all Wrangler models now with either a 3.21 or 3.73 gear ratio. 4) Real world vs. math. However, 3.55 and 3.73 are two common gear ratios for the Jeep Cherokee. Gear Ratio And Tire Size Calculator When you change your tire size you need to make sure you have the right gearing to get optimal fuel economy and power. And while 4.56 is ideal for the 5-speed and 33" tires, you could actually get away with 4.10 due to the slightly lower gear ratios your 6-speed has. FREE Shipping. Example: If the drive shaft spins 3.5 times to one tire revolution, the ratio would be close to 3.55; 4 times is 4.10; 3 and 3/4 times is roughly 3.73 and so on.

Count the number of times the drive shaft spins to one revolution of the tire. Numbers are good but gear ratios on paper are nowhere close to realistic when you actually drive the Jeep with all the variables the world throws at it. Smittybilt OEM Replacement Soft Top with Tinted Windows; Black Denim (87-95 Jeep Wrangler YJ w/ Factory Soft Top & Half Doors) $251.99 FREE Shipping VIN Decoder for 1997-2006 Wrangler TJs Here is a chart that shows optimal gear ratios for lifted Jeeps with larger tires.

Put the transmission in neutral and spin the rear wheels. Wranglers that are equipped with the Rubicon package typically come with the 4.10 gear set in their Dana 44 axles.

If 4:11 going to 4:88.

Also, when making altering your factory gear ratio or wheel size your speedometer and odometer may read incorrect.

The chart below shows the relationship between gear ratios and tire size. 4.88 would be way too low of a ratio for 33" tires and your 6-speed transmission. Carrier Breaks: 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. What is the stock gear ratio on a 94 YJ with the 2.5L engine?

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