ADDA on-highway service bay


We're here for you

ADDA provides comprehensive service and support for a variety of equipment in both on- and off-highway markets: medium- and heavy-duty trucks, buses, and coaches; fire and emergency vehicles; power-generation systems; fire pumps; marine propulsion; construction and industrial machinery. As an industry leader for over 65 years, we are proud to be an authorized service center for Allison, Detroit, mtu, Volvo Penta, Mobile Climate Control, and Mercedes-Benz truck engines. ADDA offers five service locations across the northeast, a fully equipped fleet of field service trucks, and dedicated factory-trained and certified technicians. Our parts department features a full inventory of genuine OEM, aftermarket and hard-to-find parts for on- and off-highway equipment. When repairs are needed, we have the expertise to get it done right the first time and get your equipment back in operation as quickly as possible.

Off-Highway Service

We are factory trained and certified in the service and support of power generation and distribution, construction and industrial equipment, marine propulsion, and diesel fire pumps from New Jersey to Maine. ADDA’s five fully stocked service branches in New Jersey, New York, Connecticut, and Maine mean that expert help is close, no matter where you are. Our dedicated team of technicians have supported our customers through challenges such as 9/11, Superstorm Sandy, and now COVID-19. We provide 24/7/365 emergency response to keep your lights on and your engines running.

Our capabilities include:

ADDA technician working on transmission
  • On-site service
  • Emergency response
  • Diagnostic software
  • Predictive and planned maintenance
  • Mid-life maintenance
  • All types of repairs
  • Engine overhaul and evaluation
  • Rental generation
  • Load banking
  • Engine surveys
  • Emissions/smoke testing
  • Exhaust aftertreatment
  • Fluid analysis – coolant oil and fuel
  • Fuel polishing
  • Remote monitoring
  • Controls modernization
  • Automatic transfer switch and switchgear maintenance
  • Factory warranty extensions

On-Highway Service

Our vehicle capabilities include the sales and service of diesel engines, transmissions, and related products, components, parts, and accessories. We offer complete in-house engine and transmission rebuild services and provide Allison ReTran® remanufactured transmissions, genuine parts, filters, and TranSynd™. In addition, we offer Detroit® Factory ¾ and complete power choice engines, and genuine parts, as well as new and remanufactured electronics, turbos, fuel injectors, cylinder heads, aftertreatment, OEM filters, and fluids.

Detroit and Mercedes-Benz engine services include:

  • Performance diagnostics
  • Troubleshooting
  • ECM reprograming
  • Tune-ups/maintenance
  • Component repair/replacement
  • Engine replacement
  • Engine rebuild/overhaul
  • Dynamometer testing
  • Emissions support
  • On-site troubleshooting and repair

Allison Transmission services include:

  • Performance diagnostics
  • TCM reprogramming
  • Component repair/replacement
  • Rebuild/overhaul
  • ReTran replacements
  • Dynamometer testing
  • Onsite troubleshooting and repair
  • Re-gear with Allison transmission
  • Hybrid system repair
    • Drive unit
    • Energy storage system
    • Dual power inverter module

Mobile Climate Control air conditioning services include:

  • Diagnostics
  • Leak detection
  • Component repair/replacement
  • Evacuate and recharge
  • On-site troubleshooting and repair

Maintenance services include:

  • PM/oil and filter changes
  • Tune-ups
  • DPF cleaning
  • Cooling system maintenance
  • Battery/electrical system testing
  • Fuel-system services

Periodic Maintenance

Atlantic Detroit Diesel-Allison serves an increasingly demanding on-highway business market that is cost-driven and time-sensitive. When it comes to your equipment, one of the most important things to stay on top of is the manufacturer suggested preventative maintenance (PM) cycles. At ADDA, we are here to support you with all facets of your vehicle maintenance services to keep your engine running at maximum efficiency.

Periodic maintenance is not an option. It’s a requirement based on every manufacturer’s warranty guidelines. Protect your investment and utilize only factory-accredited and trained professionals on your regularly required maintenance services.

Greyhound Lines bus service

WheelTime Service Network

As a member of the WheelTime Service Network, you can depend on quality truck and coach care coast to coast. WheelTime consistently delivers your quality truck and coach repairs on time and on budget – minimizing delays and maximizing profit.

We strive to deliver:

  • An initial diagnosis within two hours
  • Fast turnaround times
  • Prompt notification of repair completion
  • A cost estimate consistent with the final invoice
  • A time estimate consistent with when the unit is ready
  • A truck that’s fixed right the first time and backed by our Quality Truck Care Guarantee

Additional Services

Extended Warranty

Today, parts can be costly to replace on engines, equipment, and control systems. We’re here to offer an after-sales solution to reduce your out-of-pocket expense with an extended warranty. ADDA’s extended warranties are backed directly by the manufacturer and not a third party. To learn more about the options we can to offer, please contact us at [email protected].

Engine International Air Pollution Prevention Certificates

Engine International Air Pollution Prevention Certificates, or EIAPP Certificates as they are primarily referred to in the industry, is the internationally accepted documentation that a specific engine meets the international NOX emission limits for diesel engines set out in Regulation 13 of Annex VI. An EIAPP Certificate for any engine installed on a U.S.-flagged vessel must be issued by EPA or other Emissions Certifier. ADDA is able to provide the necessary documentation for these certificates. For more information, please contact us at [email protected].

Contact the ADDA Service Team

ADDA on-highway engine service