Axles

The 2018 Jeep Wrangler JL has many great, new features. It may be the most-capable Jeep Wrangler ever made. We dove right into this new model and built the first JL on 42s, named CODE1. Through our series of modifications which included Dynatrac ProRock axles and 42-inch tall tires, we ran across a situation where the transfer case may refuse to shift; specifically when the front axle is replaced with one that does not have front-axle disconnect (FAD).

The Jeep JL is equipped with a Magna transfer case. The transfer case uses a synchronizer to smooth shifts between high-range and low-range. Ironically, components of this synchronizer seem to be what keep the transfer case from shifting in certain situations. Continue reading →

The raised track-bar bracket with steering ram assist cylinder or steering stabilizer mount is an option for any 2007-2018 Jeep Wrangler JK Dynatrac ProRock44 front axle housing. This bracket is recommended for any Jeep JK with a 2-inch lift or higher.

If you would like to download this page as a PDF for reference, please click here: 2007-2018 Jeep JK Dynatrac ProRock 44 Raised Track Bar Bracket with Ram Assist mount

Track-Bar Mounting Options

OEM development engineers spent an exorbitant amount of time optimizing the vehicle’s steering linkage geometry at OEM ride height.  When a Jeep JK is lifted, a new ride height is established and the steering linkage geometry is altered.  The new steering linkage geometry results in poor vehicle handling and stability.  In order to restore the steering linkage geometry back to OEM standards, the draglink and track bar bracket mounting positions have to be adjusted. Dynatrac’s raised track bar bracket is designed to work in conjunction with a draglink flip kit to correct the steering linkage geometry.

Lance Clifford, founder of pirate4x4.com, has built a lot of 4x4s over the years. From Toyota pickups to race rigs, along with his fair share of Jeeps. When he decided to build his current Jeep JK, the one thing he had learned from all of those other 4x4s was to make the drivetrain bulletproof.

“I wanted it to not break down. Ever,” Lance said, “I wanted to be able to do any trail in comfort and know that I can get my wife and kids back to the camper at the end of the day.” Continue reading →

A couple of questions we are frequently asked by customers is how to properly fill their Dynatrac ProRock^® axle with gear oil, and which gear oil is best to use. Let’s dive right in!

First, we recommend a high-quality GL-5 mineral-based gear oil (not synthetic). In moderate to cold climates, use SAE 85/90. If you live in a hot climate, use SAE 85/140.

The specific fill procedure is a little different for the Dynatrac ProRock 44™ and the Dynatrac ProRock 60/XD60^® axles. We go through each in the following sections. Continue reading →

Dynatrac continues to lead the way in high ground clearance, severe-duty axle assemblies for the off-road enthusiast market. The all-new Dynatrac standard-cut, full-float ProRock XD60^® is the strongest and lightest axle in its class. This axle is designed specifically for Jeep Wrangler and 4x4 builds using 37 to 40-inch-diameter tires. The ProRock XD60 fills a need between the current ProRock XD60 semi-float and ProRock 80™. Continue reading →

Dynatrac introduces 40-spline 1550 front axle shaft kits designed specifically for the ProRock XD60^™ and ProRock 80™ front axle assemblies. The massive axle shafts are part of a complete 40-spline 1550 LT^® package for these axles, providing customers with unmatched strength from hub-to-hub. And they are 100 percent made in the USA. Continue reading →

Dynatrac™ introduces a solution for IFS 4x4s and KOH competitors that delivers an unmatched combination of strength, durability, size and value. The all-new Dynatrac ProRock XD60-IFS™ will take the abuse of high-horsepower and high-traction off-road tires, letting competitors use the skinny pedal without fear of breaking the differential.

More than just legendary Dynatrac strength and durability, the XD60-IFS is also narrower than the competing axles at just 13.7 inches from flange-to-flange. Continue reading →

We've had several people ask if load bolts are a useful method of strengthening ring gear teeth. The answer is that load bolts are NOT helpful for off road vehicles. Furthermore they mislead users into thinking they’re protected if their housing is so equipped. This is why Dynatrac’s focus has always been on designing a highly rigid housing as the best way to ensure gear strength and durability. Spend your money on a US-made ProRock, and not a load bolt gimmick. Continue reading →

The Dana 44 has been a desirable axle for Jeep builds nearly since its introduction in the 1940s. But before you get too excited about scoring a Postal Jeep 44 or even spend much energy drooling over the next-gen or new generation Dana 44 used under the 2007-2016 Jeep Wrangler JK, you owe it to yourself to learn the facts. Not all 44s are equal.

The Dana 44 has been manufactured for nearly 70 years, and was original equipment under Jeep, Ford, GM, Dodge, International Harvester and Studebaker vehicles, and even the Isuzu Rodeo and Honda Passport. And almost every one of these had some unique, funky specification just for that model. The Dana 44 has been offered in both high- and low-pinion, with centered and offset pumpkins. Factory axleshafts ranged from 10-spline through 32 with diameters from 1.175-inch up to 1.41-inch. Continue reading →