Mar 192015

UNITRAX has a new home. We are now located at:

2830 East Gretta Lane, Anaheim, CA  92806-2512

We are off of Blue Gum between Miraloma and La Palma. Our phone numbers remain the same. Please stop by and say hello.

 Posted by at 1:20 pm
Oct 212014

After a long hiatus, Motive | Richmond Gear has just re-released performance gear sets designed specifically designed for the M215 differential found in the Dodge Challenger, Dodge Magnum, Dodge Charger, Chrysler 300 SRT 6.1 Hemi cars and several Mercedes-Benz differentials. The ring and pinion sets are available in a 3.23 and 3.55 ratio.


M215 Gear Set

Call UNITRAX at 800.622.4327 for more information.

Apr 152014

American Axle & Manufacturing has released 4.30 ratio gear sets for the 9.25″ GM AAM front axle and the 11.50″ GM AMM rear axle.



The GM 9.25″ and 11.50″ differentials combinations are found in 2001 and newer Sierra & Silverado 2500/3500 pickups.

GM 4x4

GM 4×4

Contact UNITRAX for more information on ratio changing your AAM axles to a 4.30 ratio.

800.622.4327 |

Apr 042014

In response to racer feedback and OS Giken’s own observations of tuning trends, OS Giken has proudly released the OS Super Lock LSD for the Ford 8.8” (FD881-HA) Independent Rear Suspension differential. OS Giken found that it was becoming common to use the Ford 8.8” IRS carrier for high powered builds for many import sport compacts, due to the 8.8” large sized ring gear, low costs/high availability, and wide selection of available gear ratios. The OS Giken Super Lock is available for both 31 and 28 tooth spline axles. Both designs feature 20 active clutch plates.


All of OS Giken’s Super Lock differentials feature forged cases that are chemically heat treated, providing the highest level of durability and strength possible. Additionally, all Super Lock LSDs are fully tunable for any specific application. Please feel free to inquire with details regarding your unique needs and the engineers of OS Giken will be happy to provide a recommending setting!

Contact UNITRAX for more information on the FD881-HA OS Giken Super Lock.

Apr 022014

Autotech has released the Gen III version of the  All-American Wavetrac® helical-gear torque-biasing limited-slip unit for the 2003 and newer Dodge Viper SRT 10. The Wavetrac will fit Super 44-3 through 5ICA (2003 – 2014) differentials.

Dodge Viper SRT 10 Wavetrac

SRT 10 Wavetrac

The Gen III version Wavetrac® (48.309.168WK) for the 2003 and newer Dodge Viper SRT has been updated with more friction internally and an updated preload hub that offers more consistent load and increased adjustability.

The Wavetrac® for the Dodge Viper SRT offers the following benefits:

Wavetrac®: Designed from a clean sheet using state-of-the-art knowledge and engineering to be a better differential than any other. It uses a patented design to improve grip in low traction conditions.

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.


• Innovative:
Patented Wavetrac® design automatically improves grip in low traction conditions. This feature is truly innovative and unlike any other torque biasing diff design.

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

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

• Customizable:
If desired, you can alter the diff’s behavior to suit your needs using optional components.

• Includes new SRT output shafts.

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

• American Engineered and Manufactured!

Call or Email UNITRAX for more information on the innovative Wavetrac® Helical Torque-biasing limited-slip differential.

Mar 052014

The revolutionary and race-proven OS Giken Super Lock is now available for the Scion FR-S and Subaru BRZ!

2013 Scion FR-S2

The OS Super Lock LSD is the culmination of years of extensive research and development that led to a revolutionary LSD design with the capacity to house an unprecedented number of friction plates (up to 28 plates in total). Combined with OS Giken’s patented lock timing system, the Super Lock LSD is able to achieve complete lock in a progressive, smooth, and quiet manner, making it outstanding for both street and racing performance.

OS GIken TY421-HA

An OS Super Lock installation can be performed in less than one day. Call or Email UNITRAX for more information.

800.622.4327 |


Jan 162014

The popular 4.29 (03-487429LC/LX) ratio ring and pinion set for the Getrag H226 differential found in many Dodge Challenger SRT 8s is now shipping again. The 4.29 ratio gear set is manufactured from 4320 steel which is 3x stronger than an 8620 gear set. The 4.29 ratio gear set had been on backorder for over six months.

US_Gear_Logo_color_shadow_sm2011 Dodge Challenger SRT8 392 Inaugural Edition

Call UNITRAX at 800.622.4327 or email with any questions about ratio changing or upgrading your Getrag H226 differential.