509-924-3159
Family owned & operated in Spokane Valley since 1998

Transmission repair, fixed the right way.

Automatic and heavy-duty diesel transmission rebuilds, diagnostics and drivetrain repair from a Master ASE-certified technician with 32+ years of experience. Honest, reliable, quality workmanship.

  • 3 yr / 36,000 miwarranty available
  • Master ASEcertified technicians
  • Ford · GM · Dodgeauthorized repair facility
  • BBB A+rating

What we do

Complete transmission & drivetrain service

From a simple sensor to a full heavy-duty rebuild, we find the weak spot and make it better than original.

Our specialty

Heavy-duty diesel rebuilds

Ford, Dodge and GM diesel trucks up to 1 ton, built heavy duty, because a truck should be able to work like a truck.

Automatic transmission rebuilds

Complete overhauls using upgraded parts that meet or exceed original manufacturer specifications.

Towing, RV & motorhome builds

Transmissions built to pull your RV, or for motorhomes up to 30 ft, so you can travel without worrying about a breakdown.

Diagnostics & computer systems

Check engine light on? We read the transmission control computer for stored codes. Many problems are as simple as a sensor.

Clutches, transfer cases & drivelines

Clutch replacement, transfer case repair and driveline service for cars, trucks and 4x4s.

Maintenance, tune-ups & brakes

Transmission service is recommended every 2 years or 24,000 miles for most vehicles. We also handle tune-ups and brakes.

Why Custom Transmission

Building trust one transmission at a time

The dealer can only bring your transmission back to original condition. We find the weak area and make it better, so your vehicle performs the way you need it to.

  • Master ASE-certified32+ years diagnosing and repairing transmissions, with ongoing manufacturer training.
  • Upgrades that make senseSteve researches which upgrades actually help, and which don't, for your vehicle.
  • No phone guessworkWe look before we quote: a quick visit and test drive. No charge unless equipment has to be connected.
  • Parts & labor warranty12 months / 12,000 miles standard on most non-commercial vehicles; 3 yr / 36,000 mi available.
  • Extended warranties & fleets welcomeWe honor many extended warranty policies, and fleet and corporate accounts are always welcome.

3-year / 36,000-mile warranty available

Standard warranty: 12 months / 12,000 miles on most non-commercial vehicles, covering parts and labor. Most major credit cards accepted.

Ask about coverage

From our customers

What customers say

"Thank-you for your great work and excellent customer service. It was nice not being talked down to because I am a woman. Thank-you for answering my many questions."
Shalynn B.
"Warranty A-Ok. Steve paid big time for my trans trouble while we were in Havasu, AZ. Got me going ASAP."
Lanny B.
"Thanks for the excellent workmanship!"
Lance S.

Testimonials reproduced from the shop's existing website. [Placeholder: a live Google reviews widget could go here.]

FAQ

Common questions

Can you give me a price over the phone?

Not without looking at it. Anyone who quotes a transmission over the phone would need X-ray vision. Bring it in for a quick visit and test drive and we'll estimate the repair. We don't charge anything unless we have to connect equipment, and often that isn't necessary.

Does a transmission problem mean I need a new one?

No. Many problems are as simple as a bad sensor. If you do need a complete transmission, we'll overhaul it with close attention to the newest updates available.

Do you accept extended warranties?

We honor many extended warranties. Call 509-924-3159 to check your policy.

Why choose you over the dealer?

We get more personal, keep our equipment updated, and install the best parts available, most better than original. We find the weak area and make it better.

Do you service fleets?

Yes. Fleet and corporate accounts are always welcome.

Do you offer financing or house accounts?

We don't offer personal house accounts, but we accept most major credit cards.

Visit the shop

Hours & location

Address
521 S. Pines Rd
Spokane Valley, WA 99206
Get directions →
Hours
Shop hours
Monday – Friday8:00 AM – 5:00 PM
SaturdayClosed
SundayClosed
Custom Transmission521 S. Pines Rd · Spokane Valley, WA 99206Open in Google Maps →

Request a quote

Tell us what's going on

Send a few details and we'll call to set up a visit and test drive. Prefer to talk now? Call 509-924-3159, Monday through Friday, 8 to 5.

Concept mockup: this form is display-only and is not connected to anything.

Call now Get a quote