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, Missouri, Montana 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

  • Sonnax Industries manufactures first-class products to go along with their excellent customer service."

    J. Paradise
    HL Performance Converters

  • TWO THUMBS UP. I am a firm user of Sonnax products and they are a company that puts their customers first. Thank you for great products, and I look forward to future products!”

    B. Cole
    Toronto, ON

  • You can’t fix transmissions without Sonnax.”

    Lou Vari Transmission
    Youngstown, OH

  • We love your products. I used honda PR valve and end plug kits and they work wonderful, so now we use them with every rebuild.”

    K. Diap
    ANS Transmission
    Toronto, Ontario

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



Work as part of a purchasing team of buyers and planners to support the company’s material requirements for both production and product development. The position involves multiple interfaces both within the company and with supplier partners to procure products, materials, supplies and services for customer requirements and inventory demand. 


  • Verify requirements and specifications of purchase requests.
  • Review inventory records, material requirements planning reports and check MRO storage areas to determine if material on hand is in sufficient quantity.
  • Compare prices, specifications, and delivery dates and award contract to bidders, or place order with suppliers or mail order firms.
  • Negotiate with suppliers to obtain optimal terms. 
  • Clearly communicate Sonnax’s expectations to suppliers and hold them accountable for meeting those expectations.
  • Confer with suppliers concerning late deliveries.
  • Compute total cost of items purchased.
  • Maintain electronic records of items purchased, prices and deliveries.
  • Maintain organized records of materials, suppliers and purchase order history.
  • Help resolve any issues with invoicing and accounts payable.
  • Other projects as assigned by manager.


  • Associate’s degree and/or 2+ years related experience. B.S. Degree a plus. 
  • Proficiency in Microsoft Office, with emphasis on the use of Excel, Word and Outlook.
  • Ability to successfully plan and organize work through prioritization, breaking down tasks and requirements, scheduling time for completion, and staying focused.
  • Able to proactively build collaborative working relationships with key internal and external contacts. 
  • Capable of acquiring and applying new information quickly.
  • Ability to learn and understand how all aspects of one’s work affects other departments, and give care and attention to quality.
  • Ability to communicate clearly with different types of people via different mediums (phone, email, face to face, etc.).
  • Must display a track record of good judgment and sound decision making skills.


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

CNC Machine Operator


Responsible for the operation of computerized numerical control (CNC) machines to produce parts to specified tolerances and company standard times. 


  • Operate CNC equipment to meet parts per hour requirements.
  • Make necessary offset adjustments or request program updates in order to hold dimensions and tolerances to print specifications.
  • Perform routine maintenance such as maintaining fluid levels to CNC machines.
  • Take proper care of all Sonnax tools and equipment and keep work areas clean and free of hazards.


  • High school diploma or GED required.
  • 2+ years of machining experience required to be able to perform the above responsibilities with minimal supervision.
  • Ability to read and understand G-Code programming. 
  • Knowledge of feeds and speeds.
  • Ability to interpret engineering drawings to understand tolerances of the parts to be machined.
  • Ability to interpret blueprints, setup documentation and tooling sheets to set up a variety of jobs.
  • Ability to properly use precision measuring equipment.
  • Understanding of basic shop math including decimal/fraction conversion.


  • Ability to lift up to 70 lbs.
  • Able to wear (without restrictions) required personal protective equipment including safety eyewear and footwear.

Human Resources Assistant


Provide a variety of technical, administrative, and confidential duties to support the human resources department in the areas of benefits, recruiting, onboarding, personnel and training records. 


  • Benefits administration including enrolling new hires, terminating employees and assisting employees with changes and claims. 
  • Advertise/post job openings and screen applications and resumes.
  • Conduct pre-screening interviews and reference checks.
  • Coordinate with candidates and hiring managers for interviews. 
  • Conduct the on-boarding of new employees.
  • Maintain personnel files.
  • Keep abreast of employment laws and practices.
  • Prepare reports for the HR monthly status update.
  • Coordinate training schedules, file all training records and manage database. 
  • Interpret, assist and respond to queries from employees and managers regarding company policies. 
  • Type memos, general correspondence, job postings and confidential documents. 
  • Daily interaction with employees, supervisors and business associates.
  • Assist with additional HR responsibilities as needed. 


  • Associates degree with 2+ years of previous job related experience, or knowledge of principles and practices of Human Resources is preferred.
  • Proficiency with MS Office (Outlook, Word, Excel and Power Point) and experience with ADP HRIS system preferred.
  • Demonstrated skills in record keeping experience required.
  • Knowledge of benefits administration and employment laws and practices is expected.
  • Must be polished, driven and dedicated with excellent attention to detail and high sense of confidentiality.
  • Must possess strong customer service skills with the ability to identify and solve problems.
  • Ability to think quickly and respond professionally under pressure.
  • Positive attitude, enthusiasm and initiative required.
  • Excellent oral and written communication skills required.
  • Ability to learn and adapt to new systems, processes and tools.
  • Excellent organizational and time management skills with the ability to multi-task and meet tight deadlines in a calm manner.
  • Ability to work independently.
  • Work efficiently and effectively in an environment with frequent interruptions.


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

Inside Sales Specialist


Actively participate in servicing current accounts to maximize company sales efforts.


  • Work closely with sales representatives and other departments to implement order fulfillment and follow-up services including order entry and product allocation/availability to achieve customer satisfaction.
  • Respond to customer order questions including price quotes, availability, delivery status, shipment tracking and back order status in a timely and courteous manner.
  • Work closely with other departments to document and process information related to customer complaints and return authorizations, including appropriate research and back-up.
  • Set up and maintain accurate customer account information and notes to maximize customer service.
  • Maintain detailed information with key accounting and report software including domestic and foreign shipment options and requirements to promote cost effective order fulfillment.
  • Assist in the development and maintenance of new order fulfillment procedures including responding to new opportunities and requests for improved customer service. 
  • Coordinate mailings for product team promotions and assist with other mailings as needed.  
  • Provide back-up to Sales Support team as directed by Manager.


  • High school diploma or GED and experience in customer service or sales support required. 
  • Experience with ERP systems.
  • MS Office proficiency with emphasis on Outlook, Excel and Word.
  • Ability to begin projects without prompting, energetically follow through and propose and plan solutions.
  • Manage time and resources to ensure that work is completed efficiently and on schedule.
  • Ability to organize and communicate information clearly.
  • Able to maintain accuracy – errors involving order entry and customer complaint processing as a percentage of corresponding totals must be less than 5%.
  • Consistent attendance at workstation to perform job functions and responsibilities is essential.
  • Follow established procedures and guidelines to ensure efficiency and accuracy.
  • Must be a team player.

Machine Operator


Responsible for the setting up and operation of manual equipment to produce parts or assemblies according to print specifications.


  • Set up and operate machines to meet production requirements. 
  • Prep parts for transport to the next work center, inventory or warehouse. 
  • Interpret engineering drawings to determine specifications required to meet quality standards.
  • Make necessary adjustments to hold dimensions and tolerances.
  • Perform routine machine maintenance.
  • Take proper care of all Sonnax tools and equipment and keep work areas clean and free of hazards.


  • High school diploma or GED required. 
  • Ability to interpret work instructions, setup documentation, and routing to set up a variety of jobs.
  • Knowledge of basic mechanical properties.  
  • Experience in using and reading precision measuring tools. 
  • Basic shop math skills including decimal/fraction conversion.


  • Ability to lift up to 70 lbs. 
  • Able to stand for long periods of time. 
  • Willing to work around petroleum based lubricants.
  • Able to wear (without restrictions) required personal protective equipment including safety eyewear and footwear.



Responsible for planning and organizing production schedules for the manufacture of industrial or commercial products.


  • Maintain a master production schedule for assigned products to meet desired inventory levels, sales forecasts and customer orders.
  • Review and compare forecasts to actual demand and recommend adjustments to the manager as needed.
  • Plan, schedule and prioritize orders for purchasing and production departments according to previously established manufacturing sequences and lead times.
  • Confer with department supervisors to determine status of assigned products and resolve scheduling conflicts.
  • Expedite operations that delay schedules and alter schedules to meet unforeseen conditions.
  • Provide updated availability information to sales.
  • Analyze supply chain capacity for assigned products and recommend adjustments to manager as needed.
  • Cleary communicate expectations and requirements to internal suppliers.


  • Associate’s degree or 4+ years of experience in manufacturing planning required.
  • Lean Manufacturing, APICS Certification preferred, but not required.
  • Knowledge of ERP systems.
  • Proficiency in Microsoft Office Suite.


  • 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