Because we're good under the hood
Welcome to 3D's in Missoula
Since opening our doors in 2010, we’ve built a reputation as one of the Northwest’s most trusted Class 8 truck service and parts shops. What started with a commitment to hard work has grown into a shop known for reliability, expertise, and putting the customer first — serving owner-operators and fleets who need a diesel mechanic in Missoula — every time.
Our Diesel Services
Powertrain
Servicing CAT and Cummins engines, transmission, and clutch systems to keep you pulling strong.
Tune-Ups
From oil changes to valve adjustments — we help you get every mile out of your engine.
Electrical
Troubleshooting and repairing lights, sensors, wiring, and controls to keep you running safely.
Diagnostics
Fast and accurate engine and systems diagnostics using industry-leading tools and software.
Fleet Support
Reliable support for fleet managers with scheduled maintenance, priority service, and tracking.
Custom Fabrication
Precision fabrication for frame rails, brackets, mounts, exhaust systems, bumpers, headache racks, and custom diesel components — built to handle heavy-duty applications.
Full-Service Diesel Repair
Engine swaps, glider kit installs, rear-end work, and performance upgrades — backed by certified technicians and trusted parts.
Authorized Retailer
Authorized retailer for industry-leading brands. Genuine parts. Expert installation. Backed by factory warranties.
In the Shop
Custom Table
Custom-built engine assembly table, engineered to client specifications. Heavy-duty construction. Precision leveling. Built to handle the demands of professional engine work.
Engine Build
Custom-built Caterpillar engine, assembled to exact client specifications. Premium components. Expert craftsmanship. Built to deliver reliable performance mile after mile.
About Us
Founded in 2010, 3D's has built a reputation as one of Missoula's most trusted Class 8 truck service and parts shops. What started with a commitment to hard work has grown into a shop known for reliability, expertise, and putting the customer first — every time.
Family Owned & Operated
Today, 3D's is proudly owned and operated by Zach and his family. They've carried forward the same values that built this business: honest work, attention to detail, and treating every truck like it's their own. Whether you need routine maintenance, complete engine rebuilds, complex diagnostics, or custom fabrication, you're working with people who truly care about keeping you on the road.
Get in Touch
Call, stop by, or send us a message — we'll take care of you.
Phone: 406-549-2111
Email: 3dszach@gmail.com
Business Hours: Monday through Friday, 7am to 4pm
Location: 8155 Highway 10 West, Missoula, Montana
3D's Missoula is located south of I-90, follow the directions below:
I-90 Westbound:
Take exit 96, turn left at the stop sign, go across the bridge about 1/8 mile. Take a right at the traffic light across from TA Travel Center, go another 1/8 mile and turn left. We're the first building on your left.
I-90 Eastbound:
Take exit 96, turn right at the stop sign, then take a right at the traffic light across from TA Travel Center. Go about 1/8 mile and turn left. We're the first building on your left.