Dec 142011

UNITRAX has been a proud Gear Vendors Under/Overdrive™ dealer for over 27 years. As a matter of fact, Gear Vendors, was the first new distributorship we acquired as UNITRAX. We recognized very early on that the Gear Vendors gear-splitting overdrive was simply “Best of Breed.”


The Under/Overdrive™ is available for most 2WD and 4WD GM, Chrysler, and Ford vehicles. The overdrive can also be installed in many restoration, hot rods, muscle cars, classic cars and trucks. The gear-splitting and overdrive benefits allow you to retain up to twice the power from one gear to the next for improved performance when climbing grades or towing heavy loads. When running on flats, at the push of a button, you can lower your RPM by 22%. If you have an overdrive now, you can run in double overdrive!

The key features of the Under/Overdrive™ are:

• .78:1 Overdrive with a 22% engine RPM reduction. Reduced engine noise for a quieter ride.
• 30,000 GCVW. Tested at 4500 Ft. Lbs of Torque. For applications up to 1500HP.
• Planetary design for long life and quiet operation. Hydraulically operated & electronically shifted.
• AUTODRIVE™ for full throttle shifts with automatic transmissions.


Speak with UNITRAX to see how the Gear Vendors Under/Overdrive™ can provide you with the right gearing.

UNITRAX can be reached at or 800.622.4327

Dec 142011

UNITRAX’s version of the Super 44ICA for all Gen I & II Dodge Vipers is back. The Super 44ICA Truetrac has proven to be one of the most reliable limited-slip differentials that UNITRAX has ever offered for the RT/10 and GTS Viper. Plus, it is priced very competitively.



The Detroit Truetrac was the first helical gear differential ever introduced into the automotive aftermarket as an Eaton brand. It remains the leading helical gear-type limited slip differential in the industry. Detroit Truetrac’s proven helical gear design eliminates the need for wearable parts, resulting in maintenance free traction recognized not only for its toughness, but its smooth and quiet operation as well.

Proven design, low cost and effective performance all make the Eaton Detroit Super 44TT3 Truetrac limited slip differential the ideal choice for the Gen I / II Dodge Viper . No maintenance – Just Traction!


Dec 132011

UNITRAX worked with Richard Kratz of Mopar Max Magazine to upgrade the drivetrain of the “Maulin’ Magnum”.

Part one of the article is in the December 2011 issue of Mopar Max magazine. UNITRAX installed the OS Giken CR031-HA Super Lock into the Maulin’ Magnum M215 differential and a set of the Driveshaft Shop CH56 Axles.

The “Maulin’ Magnum” is driven by Alex “The Car Girl” Rogeo. Alex and her crew chief Richard Kratz, made some changes to the “Maulin’ Magnum” and Alex changed her launch technique. The results  generated the team’s first 11-second passes. At the recent street-legal drags at Auto Club Dragway in Fontana, California, the last three runs were 11.66, 11.65 and 11.66, with the best being 11.65 at 118 mph.

Here’s a link to one minute in-car video of her first ever run in the 11’s. It’s fun to watch her reaction.

Part two, covering the installation of the OS Giken Super Lock and the Driveshaft Shop axles, will be in the January, 2012 issue of Mopar Max Magazine.

Dec 132011

The state-of-the-art Wavetrac® torque-biasing differential (56.309.181WK) is now available for the Ford 8.8″ 31 spline c-clip differential. The American designed and manufactured Wavetrac® gives you quicker acceleration and faster cornering by driving both drive wheels instead of just one. And, it offers improved no-load performance when compared to other helical gear differentials on the market.

• Innovation
Patent pending Wavetrac®  design automatically improves grip in low traction conditions. This feature is truly innovative and unlike any other torque biasing differential design.

• Superior Materials
9310 steel gears run in case-hardened billet or forged steel bodies. ARP® fasteners are used throughout.

• Maintenance Free
As supplied new, the Wavetrac®  differential will perform a lifetime of service without maintenance or rebuilding.

• Limited LIFETIME Warranty
All Wavetrac®  differentials include a transferable, Limited Lifetime Warranty.

The Wavetrac®  is 100% designed and manufactured in the U.S.A.

Call UNITRAX at 800.622.4327 to order your Wavetrac®  or schedule an installation.

Dec 132011

The Richmond Gear division of Motive Gear has released a 3.55 ratio ring and pinion set (49-0197-1) for the Getrag H226 aluminum housing differential. 2009 and newer H226 equipped Dodge Challengers can benefit from this American made 3.55 ratio gear set.

Call UNITRAX at 800.622.4327 or 714.630.4327 for more information or to schedule an installation. Email:

Dec 122011

The Getrag H226 found in the 2009 – 2011 Dodge Challenger. This assembly is equipped 3.73 ratio gear set and a stock limited-slip differential. The unit  is also available in 3.06 and 3.92 ratios.

Dodge and Chrysler M210 (5.7) and M215 (6.1 Hemi) owners can upgrade to the H226 differential!

Getrag H226 3-73  004Getrag H226 3-73  008

Call UNITRAX at 800.622.4327 for more details.