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If you’re having difficulty shifting gears, the clutch is jamming, there is grinding or shaking when you shift gears, or it is leaking fluid and has a burning smell, your transmission could be in need of a repair. In newer vehicles, an electronic warning light may come on to let you know you need a transmission repair. Stop by our shop in Scappoose, Oregon to have one of our highly trained and experience master mechanic take a look at it.

  • Heavy-Duty

We diagnose and rebuild up to Class 7 transmissions (33,000 lbs and under)

Transmission Rebuild
Transmission Replacement
Driveline Repair & Maintenance
Drive Shaft & U-Joint Repair
Transmission Fluid Flush & Service
Differential Diagnosis
Differential Rebuild and Service
Axle Repair & Replacement
Clutch Repair & Replacement
Flywheel Repair & Replacement
An Allison brand heavy transmission
Heavy Duty Transmission Gallery
  • Light-Duty

We diagnose and rebuild transmissions for vehicles spanning from light duty diesel pickups to Honda Accords – and everything in between.

Transmission Rebuild
Transmission Replacement
Driveline Repair & Maintenance
Drive Shaft & U-Joint Repair
Transmission Fluid Flush & Service
Differential Diagnosis
Differential Rebuild and Service
Axle Repair & Replacement
Clutch Repair & Replacement
Flywheel Repair & Replacement
A light, automotive transmission
Light Duty Transmission Gallery
  • Performance

With more than 40 years of experience, our specialists can get the transmission on your performance diesel pickups to your hot rod dragsters fully custom built to handle whatever purpose you use your vehicle for. Many completed transmission units are in stock on our shelves, ready to install.

Transmission Rebuild
Transmission Replacement
Driveline Repair & Maintenance
Drive Shaft & U-Joint Repair
Transmission Fluid Flush & Service
Differential Diagnosis
Differential Rebuild and Service
Axle Repair & Replacement
Clutch Repair & Replacement
Flywheel Repair & Replacement
A Reid Super 80 performance transmission
Performance Transmission Gallery

Why Choose Us?

Pro Automotive & Diesel is a family owned and operated shop that services the Portland Metro Area and all other parts of Oregon as well. We provide fair and honest automotive services with fair pricing based on surrounding areas.

We are a full-service shop with high end equipment and professional master technicians that works on all makes and models – domestic, import, manual, automatic, standard, hybrids, older, and brand new. Not sure exactly what your transmission does? Don’t worry, we have 15 ASE certified Technicians that have you covered! Feel free to stop in for a thorough inspection and diagnosis on your vehicle.

We provide free loaner cars on a first come first serve basis, free visual inspections of your undercarriage and after-hours drop-off and pick-up! 

How Can We Help?

Schedule Appointment
Request Quote
Call (503) 987-4000
  • 50038 Columbia River Hwy
  • Scappoose, OR 97056
  • Monday - Friday: 8:00am - 6:00pm
  • Saturday: 8:00am - 5:00pm
  • Sunday: CLOSED
  • Phone: (503) 987-4000

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