No one knows transmissions & torque converters like


No one knows transmissions & torque converters like 2008-sonnax-logo-white

Mission Statement

Sonnax’s mission is to be the leading supplier of innovative drivetrain components to the automotive aftermarket by developing quality solutions that serve customer needs. To achieve our mission we are focused on three broad strategies:

  • Identify, design and deliver the highest-quality products in a timely fashion
  • Provide excellent customer service through technical support, education and friendly customer response
  • Provide our employees with a rewarding career experience that is respectful and challenging

About Us

Founded in 1978, Sonnax is an award-winning industry leader in the cutting edge design, manufacture and distribution of the highest quality products to the automotive aftermarket, commercial vehicle industries, and industrial sectors utilizing drivetrain technology. We offer a wide variety of innovative components used to remanufacture torque converters, rebuild automatic transmissions, upgrade driveshafts and protect the driveline from over-torque damage.

As a leading supplier to the automotive aftermarket, Sonnax exports to more than 70 countries and supports emerging markets worldwide. An international network of distributors, remanufacturers and technical resources is one result of our commitment to successful partnerships with our customers. The Sonnax TASC Force® is vital to this effort, bringing the Sonnax team together with transmission specialists, remanufacturers and rebuilders to share knowledge benefitting the entire transmission industry.

Recognized in 2012 and 2014 as one of the Best Places to Work in Vermont, Sonnax is one of the fastest growing companies in the state and we are proud to be a 100% employee-owned company. Sonnax corporate headquarters located in southern Vermont includes state-of-the-art design, inspection, technical development and distribution facilities, with additional Technical Development Centers located in California, Georgia, Illinois and Wisconsin. Our 150 plus employees take great pride in the Sonnax name, and strive to further the company’s reputation for excellent service, technical knowledge and customer dedication.

Sonnax Industries is an ISO 9001: 2008 Registered Company

Jasper Award
Top 10 award


  • Best Places to Work in Vermont 2012 & 2014
  • 24-time Winner of Transmission Digest Top 10 Products Award
  • 18-time Winner of Transmission Digest Top 10 Tools Award
  • 6-time Winner of Governor's Worksite Wellness Award
  • ATRA/Gears Magazine Distinguished Supplier Award
  • Jasper Service Award
  • Jasper Supplier Award
  • TCRA Exporter of the Year Award
  • TCRA Appreciation Award


Note: For GPS purposes, use 2 Imtec Lane as Sonnax street address.

From Boston & Points East

  • Route 2 West to Gardner, MA
  • Take Route 140 North to Route 12 North
  • Stay on Route 12 North through Keene, N.H.
  • Drive north toward Bellows Falls and cross the second bridge to Vermont
  • Turn right onto Route 5 North for about 3 miles
  • For the Sonnax Technical & Distribution Center, turn right onto Industrial Drive (just before the passing lane begins on Route 5)
  • For Sonnax Corporate Headquarters, stay on Route 5 for approximately 1/2-mile longer, then turn right onto Imtec Drive (just past the Shell Station). The Sonnax parking lot is on your immediate left.

From Albany & Points West

  • Get on Route 7 East to Vermont
  • Route 7 turns into Route 9 in Vermont
  • Drive Eastward on Route 9 to Brattleboro, and get on I-91 North
  • Get off at Exit 6
  • For Sonnax Corporate Headquarters, turn left at bottom of exit ramp, then take your first right onto Imtec Drive (just past the Shell Station). The Sonnax parking lot is on your immediate left.
  • For the Sonnax Technical & Distribution Center, turn right at the bottom of the exit ramp, proceed about a 1/2-mile south on Route 5, then turn left onto Industrial Drive

From Points North

  • Take I-91 South to Exit 6
  • Turn right onto Route 5 South
  • For Sonnax Corporate Headquarters, drive approximately 2/10 of a mile; it is the first building on the left
  • For the Sonnax Technical & Distribution Center, proceed about 1/2 mile further south on Route 5, past the Corporate Headquarters, then turn left onto Industrial Drive

From Points South

  • Take I-91 North to Exit 6
  • For Sonnax Corporate Headquarters, turn left at bottom of exit ramp, then take your first right onto Imtec Drive (just past the Shell Station). The Sonnax parking lot is on your immediate left
  • For the Sonnax Technical & Distribution Center, turn right at the bottom of the exit ramp, proceed about a 1/2-mile south on Route 5, then turn left onto Industrial Drive
Sonnax Employee-Owners

Employee Stock Ownership Plan (ESOP)

Sonnax is proud to be 100% Employee-Owned!

In 2010, Sonnax announced the formation of an Employee Stock Ownership Plan (ESOP). The ESOP is the ultimate way to reward our employees for their hard work and contributions to the company.

An ESOP is an employee benefit plan that invests primarily in stock of the sponsoring company. The company sets up a trust fund which owns shares of the company stock. At Sonnax, the trust owns 100% of the company stock. Shares in the trust are allocated to individual employee accounts. As employees accumulate seniority within the company, they acquire increased vesting in those shares.

The ESOP helps to provide stable careers and local ownership. It enables a motivating atmosphere where employees can feel good about coming to work every day. And the greatest benefit of the ESOP is that it allows employees to participate in the growth and success of the business.

Of course, being 100% employee-owned is just one of the many wonderful reasons that Sonnax was named one of the best places to work in Vermont. Check out our Career Opportunities page for current openings.


TASC Force®

True collaboration toward a common goal is not something you see everyday, but that is what the Sonnax TASC Force is all about.

TASC Force Logo

The Sonnax Technical Automotive Specialties Committee (TASC) Force is composed of experienced transmission rebuilders and technicians who value technical innovations and have hands-on understanding of the latest units and industry developments. From around the globe, the best minds in the transmission industry willingly share their know-how, with the understanding that everyone benefits when good ideas and products emerge from centuries of combined transmission wisdom.

When you see the TASC Force logo on a Sonnax product, it means the product has passed stringent testing by Sonnax and by TASC Force member shops.

Independent TASC members work for large shops, small shops, volume transmission and volume valve body rebuilders. Alongside Sonnax engineers and specialists, they are helping to develop repairs which will be used by their companies and by the rest of the transmission aftermarket.

TASC Force members contribute product ideas, test new products, troubleshoot results, and get together on a regular basis to listen, discuss and compare findings. Their efforts help provide answers and repairs for the entire industry. Everybody wins.

TASC Force Meetings

Click on the list below to read about recent TASC Force Meetings.

What people are saying about why the TASC Force is so important to this industry:

The TASC Force has been very helpful in addressing the needs and problems of the European, and especially the U.S. market.Adrian Marty, Automaten-Meyer AG
Sonnax and the TASC Force have invested thousands of hours in testing. The results of these efforts allow the transmission industry to produce a quality product at a competitive price.Dale Desveaux, Dale's Transmission, Ont., Canada
The TASC Force is another example of what happens when people in this industry get together to address common issues. The people I've met on the TASC Force are some of the sharpest in the industry and the work they do helps the entire industry. Keep it up.Dennis Madden, CEO ATRA/Gears
We have always looked at what causes failures, as well as what actually failed. This is the only true way of doing a great job for our customers. By becoming involved with the TASC Force, and using Sonnax products religiously, we are better able to do just that.Scott Medori, Parkland Transmission, Red Deer, Alberta, Canada
Transmission Digest continues to depend on the TASC Force for answers and explanations our readers need to address everyday rebuilding issues and seldom encountered pitfalls in their shop operations. Our TASC Force Tips column is highly regarded by an avid and interested readership.Bobby Mace, Publisher, Transmission Digest

Warranty Policy

Sonnax warrants to the purchaser that each part manufactured or supplied by Sonnax will be free from defects in material or in factory workmanship. The warranty period shall extend for six (6) months from the date of sale. Sonnax must receive all warranty claims before the end of the warranty period.

If Sonnax determines that the part is defective in material or in factory workmanship, Sonnax will, at its option, repair or replace the defective part, or issue an account credit for the purchase price. This remedy is Sonnax's sole liability and the sole remedy provided by Sonnax for any breach of warranty.

All warranty returns must be pre-approved. Please contact Sonnax if you have a part to be returned under this warranty.

This Warranty will not cover: Removal and replacement labor costs; Loss of time, inconvenience or other consequential damage; Any Sonnax part that has been: Subject to misuse, negligence; alteration or improper maintenance; Improperly installed in the judgment of Sonnax, so as to adversely affect its performance and reliability.

This warranty is the only warranty applicable to parts manufactured or supplied by Sonnax, and is expressly in lieu of any other warranties, expressed or implied, including any implied warranty of merchantability or fitness for a particular purpose. Any representations or descriptions in brochures, ads or catalogs are approximate only and will not create any warranty or other obligation by Sonnax. There are no warranties which extend beyond the description on the face hereof.

Sonnax does not authorize any person to create for it any other obligation or liability in connection with these parts. Sonnax shall not be liable for any incidental or consequential damage, lost profits, lost savings or punitive damages resulting from any breach of warranty.

Terms & Conditions

This website and all of its contents are the intellectual property of Sonnax Industries, Inc. No portion of this work may be reproduced or transmitted in any form or by any means, mechanical or electronic, including photocopying and/or recording, or by any other information storage and/or retrieval system without the prior written consent of Sonnax Industries, Inc. Sonnax customers may use the part numbers only for the limited purpose of placing orders with Sonnax or otherwise operating their business, but in no case is permission granted to any customer, business entity, or individual to utilize the part numbers in order to compete with Sonnax.

While every care has been taken in the compilation of information and materials on this website, we cannot guarantee that inaccuracies will not occur or that this information will remain accurate over time. The information and materials on this website are provided “as is” and without warranties or conditions of any kind either expressed or implied.

Sonnax Employee-Owners

Career Opportunities

Enjoy a rewarding career and relaxing quality of life in beautiful Southern Vermont.

Recognized in 2012 and 2014 as one of the Best Places to Work in Vermont, Sonnax is a leading supplier to the automotive aftermarket. We design, manufacture, test and distribute a wide variety of innovative, high quality products used to remanufacture torque converters, rebuild automatic transmissions, upgrade driveshafts and protect the driveline from over-torque damage.

Sonnax is one of the fastest growing companies in the state of Vermont and we are proud to be 100% employee-owned. Our name has become synonymous with exceptional service, cutting-edge designs, technical knowledge and customer dedication. Join an exciting front-line team focused on developing and delivering the best products in the industry, a team whose imagination, hard work and results are rewarded.

Current Openings

Facilities & Compliance Coordinator


Responsible for Sonnax regulatory compliance administration including Environmental Health & Safety and the ISO 9001 quality system, and providing support for company facilities.


1. Environmental, health and safety (EHS) program administration:

  • File paperwork and forms with regulatory agencies as needed.
  • Coordinate program compliance with respective department managers.
  • Ensure that required EHS program inspections and employee training are performed and documented.
  • Maintain documents and records as needed.

2. ISO 9001 compliance:

  • Support the Sonnax ISO 9001 management representative (MR).
  • Oversee ISO 9001 document control.
  • Coordinate internal audits and interface with the external registrar.

3. Facilities support:

  • Order facility supplies as needed.
  • Coordinate housekeeping and vending services with subcontracted service providers.
  • Respond to facility security alarms as needed as a member of the alarm system call list.
  • Perform other duties as assigned.


  • High School diploma or GED, 2-4 year college graduate preferred.
  • Prior experience with environmental, health and safety (EHS) or ISO 9001 preferred.
  • Demonstrated attention to detail and organizational skills.
  • Strong proficiency in MS Office suite.


  • Ability to work in and around a manufacturing and warehouse environment.
  • Proper use of Personal Protective Equipment (safety glasses, protective footwear, etc.) is required in designated areas.


Design Engineer


Responsible for product development and design (strong emphasis on design) for manufacturability.


  • Part of a cross-functional team that designs, tests and reviews new drivetrain components for the automotive aftermarket. 


  • ASET/BSET/BSME or equivalent with 3 to 5 years of related work experience. A minimum of 5 years’ experience in geometric dimensioning and tolerancing (GD&T) is preferred. 
  • Experience producing product design layouts and detailed drawings is required.
  • Must have a strong working knowledge of the methods, processes and materials used in manufacturing precision metal and plastic parts–including aluminum die castings, steel and aluminum forgings, plastic molded components and CNC machined components.
  • Ability to work independently to determine proper materials, heat treatments, coatings, tolerances and dimensioning required for the design and manufacturing processes of product.
  • Proficiency in solid modeling using SolidWorks or an equivalent solid modeling package.
  • Proficiency with AutoCAD and Microsoft Office Suite. 
  • Knowledge of automotive drivetrain technology is desired, but not required.

Junior Network Administrator


Responsible for the monitoring, maintenance and basic configuration of various technologies managed by the Information Technology department. This position will identify and recommend appropriate solutions to be integrated into company operation and assist in implementations with close direction from the Sr. Network Administrator (Team Leader).


  • Assist in the monitoring, documentation and implementation of various systems including servers, virtual environment, SAN, network equipment, telephony, unified communications, active directory and email systems.
  • Provide backup monitoring support of network infrastructure and server backups.
  • Coordinate the distribution of client/server software and service packs.
  • Manage antivirus/antispam hardware and software and keep up-to-date with patches and modifications.
  • Perform on-site and remote technical support as well as emergency on-call support. 
  • Assist in the organization and inventory of all hardware and software resources.
  • Create and maintain in depth technical documentation.
  • Maintain excellent communication with the Senior Network Administrator on all tasks.
  • Effectively present ideas in a business-friendly and user-friendly language.
  • Provide direction and support for other IT department members.
  • Perform other duties as assigned.


Applicants must meet one of the following criteria:

  • 2 or 4 year degree in Information Technology, Computer Science or Engineering, plus 2 years of experience in an enterprise-level IT environment.
  • High School Diploma or GED, plus 4 years of experience in an enterprise-level IT environment.

Note: Industry standard certifications in Microsoft, Citrix, Cisco or EMC may substitute for 1 year of work experience each.


  • Occasional evening and weekend work to meet deadlines.
  • On-call availability for emergency issues.
  • Lifting, pushing, pulling and /or transporting of moderately heavy objects (up to 50 lbs), such as servers, UPS’s and peripherals.
  • Sitting and/or standing for extended periods of time; some climbing and balancing, stooping, kneeling, crouching and/or crawling will be required. 
  • Dexterity of hand and fingers to operate a computer keyboard, mouse, tablet, hand and power tools, and other components.
  • Proper use of Personal Protective Equipment (safety glasses, steel toed boots, etc.) is required in designated areas.

Quality Control Inspector


Responsible for inspecting a wide variety of materials both manufactured and purchased. Inspections will include using micrometers, calipers, and gauges, testing equipment and other tools and equipment as necessary.


  • Interpret and proofread engineering drawings and blue prints.
  • Evaluate appropriate measuring tools to use to meet the intent of the drawing, and planning overall inspections.
  • Perform and record accurate and repeatable dimensional inspections to approved-engineered drawings for machined products to meet print specifications.
  • Perform tests and inspections on incoming product during and after the manufacturing cycle, including final inspections before shipment.
  • Perform “First Piece Checks” for manufacturing, packaging or shipping, as needed.
  • Use computer systems to record data, interface with MRP system and use intranet for research. 
  • Assist with customer complaints; research, draw samples and report results.
  • Recommend modifications throughout the inspection process when necessary.
  • Routinely interface with other department members such as engineers, purchasers and manufacturing personnel. 


  • High School Diploma or GED plus three or more years of inspection experience required, Associate’s Degree preferred.
  • Shop math skills required including the understanding of metric measurements as well as geometric dimensions and tolerancing.
  • Excellent communication, organizational and multi-tasking skills required.
  • Proficiency in Microsoft Office Suite.


  • Ability to wear (without restrictions) required personal protective equipment including safety eyewear and footwear.
  • Ability to lift up to 50 lbs.

CNC Programmer


Responsible for selecting the process, work holding, tooling and generating the part program to most efficiently and accurately produce manufactured components to meet company quality measures and standard times on CNC lathes and vertical machining centers.


  • Create and maintain all documentation for CNC processes.
  • Interpret blueprints, sketches and drawings to understand the tolerances and requirements of the parts to be machined before generating the manufacturing process.
  • Ensure required tooling is available for all new parts.
  • Provide process information and cycle time estimates for costing.
  • Maintain and update post processers for each machine.
  • Take direction from Manufacturing Manager and/or Shop Supervisor to determine appropriate work center, work holding and tooling, and prepare set-up and tooling sheets.
  • Work with Machine Operators to update new programs after they have been proven out.
  • Confer with engineering or quality control personnel to resolve machining or dimensional issues.
  • Assist set-up personnel and operators in resolving any problems with programs, work holding or tooling.
  • Operate CNC machine when programming schedule is light or fill-in as needed.
  • Train new CNC Operators.  
  • Work with the Manufacturing Engineers and Shop Supervisor to constantly improve set-up and machine cycle times. 


  • High School Diploma or GED required; Associates Degree or higher preferred.
  • Minimum of 5 years of experience in setting up and operating CNC equipment.
  • Minimum of 3 years of programming experience using CAD/CAM software. 
  • Strong time management skills with the ability to effectively coordinate multiple projects required.
  • Basic shop math, trigonometry, geometric dimensions and tolerancing and problem solving skills required.
  • Ability to understand and follow instructions in written, oral or diagram form.


  • Ability to wear (without restrictions) required personal protective equipment including safety eyewear and footwear.

With Sonnax you will enjoy outstanding benefits including:

  • Medical/dental/vision insurance
  • Group life/supplemental insurance
  • Employee stock ownership plan (ESOP)
  • 401(k) retirement savings plan
  • Paid holidays/vacation/personal days
  • Wellness program
  • In-house gym
  • Tuition reimbursement and more!

If you are interested in a career with Sonnax, please send your resume and cover letter to:

Sonnax Industries, Inc.
Attn: Human Resources
1 Automatic Drive
P.0. Box 440
Bellows Falls, VT 05101-0440, USA

Fax: (802) 428-1830