how to tell what gears my jeep has
The Iii Wrangler Dana Axles
The Dana portion is the nameplate of Dana Inc., who is the manufacturer of the Jeep axles. At that place have been a few different axles used in Wranglers over the years with the Dana 44 being the most popular. The Dana 30 will only be found equally a Jeep front axle while the Dana 35 will only be plant equally a rear beam on Wranglers. Dana 35 axles have earned a very poor reputation in the off-roading world, however, information technology is a corking axle for stock Wranglers. If y'all intend on running 33 inch or larger tires on your Wrangler, brand sure you have a Dana 44. If you try running huge tires on a Dana 35 yous will probably end up snapping an beam shaft.
Dana Axle Identification
Each Wrangler axle has a slightly dissimilar wait, making them easy to distinguish. The graphic below will evidence the appearance differences.
Dana 30 Axle Identification
A Dana xxx cover volition look similar a rounded square. It should take 10 commodities holes and is ix inches wide.
Dana 35 Axle Identification
A Dana 35 cover will look like an oval. The embrace will have 10 bolt holes and is 10 and v/8 inches broad.
Dana 44 Axle Identification
A Dana 44 embrace is a weird shape that looks kind of like a muffin. Like the rest of the covers, yous'll however have 10 bolt holes, and it's x and 3/viii inches wide.
What Axles Do I Have in My Jeep?
Identifying the axles in YJs is pretty unproblematic since there were no options for it. Every YJ came with a Dana 30 upward forepart and a Dana 35 in the rear.
TJ Wranglers will accept either a Dana 30 in the front and a Dana 35 in the rear unless you have a Rubicon model. In which case you'll have 44s front and back. Some TJs with a Dana xxx in the front tin can have a 44 in the rear as information technology was an option from the factory.
In early two-door JK models y'all may find a Dana 35 in the rear (2007 ii-door models), but starting in 2008 the Dana 44 is the standard rear axle on JKs. The Dana 30 is once again at the front, but all Rubicon JKs will accept Dana 44s in the front end and rear.
JL Wranglers have a Dana thirty upwardly front and a Dana 35 in the rear. The exception as ever is the Rubicon (44s front end and back).
What's the Divergence Between the Dana Axles?
Aside from the Dana differential covers, the biggest difference betwixt the axles is the size. The number in the proper name (Dana xxx, Dana 44, etc.) is in reference to this.
Dana 30: This beam size is the most mutual, and you'll only observe it on the front of Jeep. They have a ring gear bore of seven and 1/8 inches. The Dana 30 gear ratios are either 3.21 or 3.73. The width of the axle shafts is ane.thirteen inches.
The YJ Dana 30 hold a opposite cut ring and pinion, but the TJs do not. Both TJs and YJs, all the same, use a 5x4.five inch commodities pattern.
Dana 35: This was an axle size used on about Jeep rear axles. They had a band gear bore of seven and 9/16 inches. They came with either a iii.21 or 4.10 gear ratio. The width of the axle shafts is one.13 inches.
Dana 44: These are the beefier axles found on the rear of all Wrangler models now with either a three.21 or three.73 gear ratio. The Dana 44 band gear size is eight ½ inches. Rubicon models come up standard with a iv.10 rear gear ratio and also use a Dana 44 axle in the front with either a 3.73 or 4.10 gear ratio. The width of the axle shafts is 1.31 inches. Rubicon models also come with an electronically lockable differential for optimal traction while in 4WD.
Keep in mind not all Dana 44s are the same. JK Rubicon models take a thicker, slightly redesigned 44. This Rubicon beam is referred to as a Super Dana 44.
Dana Axle Spline Counts
- Dana xxx - 27 splines
- Dana 35 - 27 splines
- Dana 44 - For TJs, the inner and outer beam has 30 splines. JK Rubicon model front axles take xxx inner splines and 32 outer splines. The rear inner has 32.
Notation: Rubicon model Dana 44 axles are not the same length every bit each other due to the design of the electronic lockers. The not-Rubicon model 44s are the same length.
How to Measure Axle Shaft Lengths
Axle shafts with a u-joint in the centre are measured from the centre of the u-joint. Measuring front the center to the end of the shaft will get you the inner and outer beam lengths.
C-clip beam shafts and semi-float axle shafts are measured slightly differently than the full-bladder shafts. C-clip and semi-floats are measured from the terminate of the splines tothe front end of the mounting flange. Full-float shafts are measured from the finish of the splines to the back of the mounting flange.
How practise Dana Axles Work?
In add-on to the differential covers and band gears, the center of an beam is the differential which mates with the splines of the axle shafts. Axle shafts are centered and held in position with the axle bearings, and they're sealed with the beam seals. The complex mating of gears and splines work in unison to transfer the power through the bulldoze shafts to the differentials.
What'southward the Difference Betwixt AWD and 4WD?
Fundamentally, both systems perform the aforementioned functions of providing traction to both front end and rear wheels. AWD (all wheel drive) drivetrains are seen more than often in sedans and sports cars. These systems are always on and constantly transferring power to dissimilar wheels through sophisticated traction monitoring. The arrangement is better utilized during loftier on-route speeds.
Jeeps use a 4WD (four-wheel drive) system which is an older and more mechanical drivetrain. Normally Jeeps are rear wheel drive trucks. The driver can manually appoint the transfer case to engage the front differential. The power is delivered to opposed wheels.
In addition to manually engaging 4WD, Rubicon models take the power to electronically lock the front and rear differentials. When engaged, the lockers will transfer ability to both wheels, providing power to all wheels.
It's important to call back a Jeep'due south 4WD bulldoze train is designed to be engaged only when the wheels are slipping due to loose terrain. When engaged, the 4 low arrangement will reduce engine speed, bringing the Jeep to a crawl. The activation of the electronic lockers provides an boosted level of traction, but requires you to pay more attention to the terrain. You should only lock the diffs for brief moments to help your Jeep regain traction.
The Jeep'south drivetrain is a very circuitous system, but different AWD it'south manually engaged when needed. This results in a much more durable and less circuitous system that mainly relies on proper gearing and power transfer. With proper use and maintenance, the system can terminal for a long time and provide a high level of traction when needed.
Fitment includes: JL, JK, TJ, YJ, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, Laredo, Sport, Islander, S, Sahara, Renegade, SE, Ten, Rubicon, Unlimited, Sport-S
Source: https://www.extremeterrain.com/wrangler-jeep-axle-identification.html
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