Active Transmission and Gear


Active Transmission and Gear

We perform major and minor transmission repair work and maintenance on all domestic and foreign vehicles with the exclusion of Saab. Our Denver area warehouse stocks over 400 re-manufactured transmission assemblies for today’s most common vehicles. In the event that a transmission is out of stock or temporarily unavailable, we will place a red build on that particular model on an as needed basis to have your vehicle on the road promptly.

Our Services:

-Heavy Duty Diesel Transmissions

-Custom Car and Street Rod Transmission Conversions and Applications


-Differentials, Transfer-Cases, CV Axles, and Drivelines

-Transmission Service

Member in Good Standing with:
-Denver/Boulder Better Buisness Bureau BBB

-ATRA Automation Transmission Rebulder Associatoon Linking our company to over 2,000 Transmission Services Worldwide!

-ASE Certifies Technicans

How a transmission works


5601 Lamar Street
Arvada, Colorado 80002
United States

Located at the corner of Lamar St. & W. 56th Ave in Arvada, CO.

Get Directions


  • Rebuilt Transmissions
  • Transmission Repair
  • 4x4 Repair
  • BBBbadge
  • A+badge
  • 10-Year Badge


Monday - Friday 7AM - 5PM


8 Reviews
Susan Gettings
excellent service

A friend recommended Active Trans. and I've been a customer for over 6 years. I have complete trust in the mechanics that repair our vechicles. The work is done in a timely manner and the cost is very reasonable. There have been a few times where there was no charge. Also they will let you know when things don't need repair. We've had our oil changed at Walmart for the convenience, only to have them strip the oil pan. Active Trans. repaired Walmart's error. Also while waiting other customers have given me their positive feedback.

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saved me slot of money using these guy had this transmission installed 2 hrs ago 60k miles still running great half the money and lasted longer then I thought there competitor ( Jasper ) was double the money ! Go here if you want honest reasonable repair !

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Kellerie Gann
The best car repair company around

I have been taking my vehicles to Active transmission for years. It is great to have a company who I can trust. They have even offered me a payment plan on an expensive repair. I love their customer service and their prices! I would recommend them to everyone!

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8 Reviews



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