Dynatrac - Confidence to Explore®

Recreational Tow Rig. Off-Road Explorer. Industrial Workhorse

When factory specs just don’t cut it

Motor Trend Magazine has voted our 2009 Dodge Free-Spin kit as one of SEMA’s Top 25 New Products for 2011.

Check it out here: http://www.trucktrend.com

How do you use your truck? It might a recreational tow rig, an off-road explorer, an industrial workhorse, a daily driver or a combination of them all. No matter how you use your truck, the engineers at Dynatrac understand that the measure by which all parts are judged is strength and performance. From light duty to extreme use, your vehicle should be built for reliability and endurance under any conditions. All too often, the original equipment falls short. As an industry leader, Dynatrac has taken up the challenge of building the better truck.

Here’s a customer that has put over 470,000 miles on his Free-Spin kit!!

"I still have the original bearings, and all I do is inspect, clean and re-pack them once a year.
I netted about 1.5 - 2 mpg with the kit.(empty miles)" – (Greg Warnken, Warkarusa, IN)

Designed specifically to remove a ‘weak link’
Dynatrac’s Free-Spin™ Heavy Duty Hub Conversion Kit is designed replace the factory unit bearings with fixed spindles for superior strength, and smooth performance.
What’s wrong with the unit bearings?
Unitized bearing systems, also known as unit bearings, were designed to make vehicle assembly easier. When assembling a vehicle, the installer simply mounts the unit bearing up the steering knuckle with 4 bolts and the brakes are ready to install. This saves the OEM time and time IS money. Despite the added cost of the parts, the time saved can add up to additional profits for the manufacturer. But, as most have found, faster doesn’t always equal better.
Unit bearings are prone to failure
Due to a very narrow bearing design and plastic bearing cages, unit bearing systems are much less durable than a fixed spindle design wheel bearing system and cannot be serviced or regreased. This is especially important on a truck that has larger than stock tires. Worse yet, replacing a unit bearing is very expensive. Buying original equipment parts is incredibly expensive and many users end up buying more cost effective, but still very expensive, units bearings made overseas. These units are usually much poorer quality than the OE product and long term durability may be questionable.
When a unit bearing fails, the vehicle is often immediately disabled and cannot be driven anywhere until the unit bearing has been completely replaced. That means towing, downtime, expensive dealer repairs and could cause a ruined vacation or lost revenue for a work truck.
Commercial trucks need to get the job done 24/7
The Free-Spin™ hub conversion eliminates a weak link that could easily leave you stranded. For commercial truck owners and fleet managers, who rely on their rigs 24/7 to get the job done, the Free-Spin™ hub conversion ensures that your trucks are on the road making you money.

"As an aerospace machine shop owner, I am around high quality machined parts every day of my life. I have no problem saying that you guys produce world class products that I would be proud to put my name on." – (Brian N. 2011 Dynatrac Free-Spin customer)

Why Dynatrac?

Dynatrac was first to design, engineer and build a hub conversion kit to replace the factory unit bearings. The Dynatrac Free-Spin™ kit and has been a consistent, solid, performer since 2005
We have been continually upgrading our line with new applications and features to assure you of the best possible parts
Dynatrac components are forged, machined and assembled in the U.S.A.
Dynatrac offers an exclusive one year unlimited mileage written warranty

Dodge Free-Spin™ Heavy-Duty Hub Conversion Stage I Kit

Contents:

2 8 on 6.5 Dynatrac wheel hubs (customer to re-use rotor)
2 Dynatrac Heavy-duty spindle kits
2 Dynatrac Heavy-duty induction-hardened alloy 35 spline 1.50” outer axle shafts
1 Set- Warn Premium manual locking hubs (35 spline)
1 Kit- User serviceable wheel bearings, races and seals
1 Pair-ABS tone rings and sensor mounts (‘00 and newer only)

Dodge Free-Spin™ Heavy-Duty Hub Conversion Stage II Kit

A great addition to the Free-Spin™ kit, this option will replace the stock 2-piece, 1.31” diameter 30 spline inner axle shafts with much stronger 1 piece, 1.5” diameter 35 spline shafts. It also eliminates the prone-to-failure vacuum actuated central axle shaft disconnect (CAD) mechanism.

Contents:

2 Dynatrac Heavy-duty induction-hardened alloy 35 spline 1.50” inner axle shafts
1-2 Inner axles seal (qty will depend on application)
1 Inner axle seal housing
2 1480 Spicer U-joint
1 Kit- User serviceable wheel bearings, races and seals
1 Pair-ABS tone rings and sensor mounts (‘00 and newer only)

(Note: This kit requires 35 spline differential side gears to utilize this heavy duty inner axle kit. We can provide side gears for your differential or you can install a new high performance differential with 35 spline side gears)

Related Links:

Frequently Asked Questions

Factory Unit Bearing Pictures

Installed Locking Hubs

Dodge Photo Gallery

Key Benefits Instructions Exploded Views Part Numbers Articles Unit Bearing Horror Stories

Increases reliability
Lower cost of ownership- wheel bearings and seals are dramatically cheaper to maintain and can be easily serviced longer life, even under severe conditions
Dramatic increase is axle strength and reliability with induction-hardened alloy 35 spline 1.50” axle shafts
Simple bolt on installation- No machining or welding
Maintains stock brakes and ABS sensors
Manual-locking hubs reduce wear and increase fuel economy by preventing parts from rotating constantly during 2WD operation.
Smoother ride and better handling

With Dynatrac’s Free-Spin™ kit you can easily change out the problematic unit bearings for durable, reliable, inexpensive and easy to maintain fixed spindle wheel bearings. To many of us, our trucks are an investment. We use them for everything from driving to work to using them as a work tool. To prevent inconvenient downtime that could hurt your ability to get to work, get the job done or take the family for a much needed vacation you’ll want to protect your investment. The Dynatrac Free-Spin™ kit…it’s great investment advice.

Instructions & Downloads