AMJET Announces Major Upgrade: Thunder Series Now Equipped with German 06G Gearbox

As part of AMJET's ongoing commitment to improving product reliability and professional cleaning performance, we are excited to announce a significant upgrade across several models in our Thunder Series Sewer Jetters.

Beginning with the latest production, selected Thunder Series machines will be upgraded from the previous 01E gearbox (or domestic small gearbox) to the German 06G heavy-duty gearbox.

Due to the higher manufacturing cost and improved component quality, the upgraded machines will have a price adjustment. We encourage all AMJET customers and distributors to take note of this important product update.

Models Included in the Upgrade

Thunder EFI Series (Zongshen EFI Engine)

• Thunder 2035 EFI
  • Previous: 01E Gearbox
  • New: German 06G Gearbox
• Thunder 3023 EFI
  • Previous: 01E Gearbox
  • New: German 06G Gearbox

Thunder Series (Honda GX430 Engine)

• Thunder 2023
  • Previous: Domestic Small Gearbox
  • New: German 06G Gearbox

Our Thunder Series Sewer Jetters

The Thunder Series has become one of AMJET's most popular professional sewer jetting machines, trusted by plumbing contractors and drain cleaning companies for residential, commercial, and municipal applications.

The latest gearbox upgrade further strengthens the machine's durability and operating efficiency while maintaining the same cleaning performance customers already rely on.

Previous Gearbox Design

Earlier Thunder EFI models were equipped with the 01E compact gearbox, while the Honda-powered model used a domestic small gearbox.

These gearboxes performed well for standard drain cleaning tasks, but professional contractors often require machines capable of operating continuously for extended periods under heavy workloads.

As customer demands increased, AMJET engineers sought a more durable transmission solution.

New German 06G Heavy-Duty Gearbox

The new 06G gearbox, manufactured by a respected German brand, offers a substantial improvement in durability and mechanical efficiency.

1. Better Heat Management

The larger gearbox housing provides greater oil capacity and improved heat dissipation.

During long sewer cleaning operations, the gearbox maintains a lower operating temperature, helping extend service life and improve reliability.

2. Improved Gear Ratio

The internal gear ratio has been optimized to deliver approximately 20% higher pressure capability.

However, AMJET intentionally keeps the machine's working pressure at the previous factory setting.

Instead of increasing output pressure, the upgraded gearbox allows the engine to operate with significantly less load, resulting in:

• Lower engine stress
• Smoother operation
• Reduced operating noise
• Improved long-term reliability
• Longer engine lifespan

This design philosophy prioritizes machine durability over simply increasing maximum pressure.

3. Premium German Engineering

The previous 01E gearbox was supplied by a domestic small-brand manufacturer.

The new 06G gearbox comes from a well-known German manufacturer recognized for precision engineering, stable performance, and long service life in demanding industrial environments.

Why We Chose Reliability Over Higher Pressure

Some manufacturers advertise higher pressure figures to attract attention.

At AMJET, we believe that consistent performance over thousands of working hours is far more valuable than chasing the highest specifications on paper.

Although the upgraded transmission is capable of handling approximately 20% more pressure, we deliberately maintain our original pressure settings.

This allows the engine and transmission to work together more efficiently, reducing wear while delivering the same dependable cleaning performance our customers expect.

For professional drain cleaning companies, this means lower maintenance costs, greater uptime, and higher productivity over the life of the machine.

Built for Professional Contractors

The upgraded Thunder Series is ideal for professionals who perform:

• Residential drain cleaning
• Commercial pipe maintenance
• Municipal sewer cleaning
• Preventive pipeline maintenance
• Emergency drain blockage removal

The new drivetrain is especially beneficial for operators who run their equipment for long periods every day.

AMJET Continues to Improve

At AMJET, product development never stops.

We continuously gather customer feedback from plumbers, drain cleaning contractors, and distributors worldwide to improve every generation of our equipment.

The adoption of the German 06G gearbox represents another step toward providing professional sewer jetters with greater reliability, longer service life, and lower operating costs.

Customers ordering the latest Thunder Series models will now receive this upgraded transmission as standard.

Conclusion

The new German 06G gearbox upgrade is more than just a component replacement—it is a major improvement in durability, efficiency, and long-term performance.

By choosing stronger components and optimizing the drivetrain rather than simply increasing output pressure, AMJET continues to deliver equipment designed for real-world professional drain cleaning.

Whether you are expanding your fleet or purchasing your first professional sewer jetter, the upgraded Thunder Series offers greater confidence for every job.