40 years of experience · Ajax
Duramax, Cummins & Power Stroke Repair in Ajax
Diesel pickups and work trucks, plus VW TDI and Mercedes-Benz diesel. Engines rebuilt in house, and every option explained before we start.
- Duramax, Cummins and Ford Power Stroke
- VW TDI and Mercedes-Benz diesel too
- Injector, turbo and engine rebuilds in house
Open Mon–Fri 8:30 am – 6:00 pm · 200 Fuller Rd, Ajax
Smoke, hard starts or low power?
- Smoke, hard starts or low power
- Limp mode or warning lights
- Rough idle or knocking
- DEF or SCR warnings
The diesel engines we work on
Repair, diagnostics, injectors, turbos and engine rebuilds on each of these, done here in Ajax.
- DuramaxGM and Chevrolet diesel pickups and work trucks.
- CumminsRam diesel pickups and work trucks.
- Ford Power StrokeSuper Duty pickups and work trucks.
- VW TDI
- Mercedes-Benz diesel
We don't do emissions deletes. We repair SCR, DEF and other emissions systems; we don't remove or bypass them.

How it works
- 1Call or send a request
Tell us what the vehicle is doing. We'll be in touch with you right away.
- 2We find the real problem
We track down what's actually wrong, so you don't pay for parts you didn't need.
- 3Photos, a call and every option
We send photos, call to explain what we found and go through every repair option, with an accurate quote.
- 4You choose, we do the work
Rebuilding is often an option instead of replacing. You pick the repair, we do it right.
What customers say
“I have a 2006 Ford F250 diesel truck and several other shops refused to work on it because it was a diesel. … Turned out that it was a $5 hose clamp and ended up being a relatively minor inexpensive repair. [He] could have easily charged me for parts and work that I thought I needed but only did what was necessary to fix the problem for the least expense possible.”
“Their quotes are accurate, and the work is impeccable. When the dealership wanted $1200 to fix an automatic lock, [he] found the real problem and had it repaired for $150.”
“My 2018 GMC Sierra 1500 5.3 had basically blown up on me. [He] did a complete diagnosis of the engine issues and at each step sent photos and called to explain exactly what the issues are and what the options to repair were needed.”
An owner-run shop with 40 years of experience
Midway is an independent, owner-run shop at 200 Fuller Rd in Ajax with 40 years of experience in diesel, driveline and general repair.
- In-house rebuilds: engines, transmissions, transfer cases and differentials
- Custom driveshafts
- Diesel: Cummins, Power Stroke, Duramax, VW TDI and Mercedes-Benz
- Gas vehicles too
- Certified Vehicle Inspection Centre: safety inspections and annual yellow sticker
- Landscaping and snow-removal fleets
We also do driveshafts, transmissions, safety inspections, brakes, exhaust and general repair.
Tell us what it's doing
Call the shop or send a request. We'll be in touch with you right away.
Mon–Fri 8:30 am – 6:00 pm