Pick-up
Coordinate free equipment or component pick-up when applicable.
24-Hour Rush Repair
Independent Mack service · Fontana, CA
Mack Truck Repair in Fontana
Mack built its legend on vocational toughness — Granites under mixers and dumps, Anthems on the highway — and Mack owners are loyal for a reason. Our Fontana shop repairs Mack trucks across the machine: MP7/MP8 engines, mDRIVE automated transmissions, aftertreatment, and the differentials and drivelines that take vocational abuse (gear rebuilding is this shop's founding trade). Independent shop, not a Mack dealer.
Independent Mack service · Fontana, CA
Mack work we do every week
Engine repair and in-frame work; mDRIVE and manual transmission service; aftertreatment diagnosis and derate tracing; differential and driveline rebuilding in-house; PTO and hydraulic systems for mixers, dumps and refuse trucks; and chassis, brake and suspension work. Documented teardown, written quote, rebuild-standard work — the way a Mack deserves.
Brands we serviceMack
Mack Truck Repair in Fontana · Fontana, CAWhy Mack owners run to Fontana
Dealer diesel shops book out deep and price like it. Here the standard is the same and the process is transparent: teardown documented with photos and video, worn parts measured and shown to you, a written quote before work begins, and free pick-up and delivery when applicable. Regular hours Monday–Friday, 6 AM–5 PM — and the 24-hour rush line runs every day of the year, because trucks earn nothing parked.
- MP7 and MP8 engine repair and rebuilds
- mDRIVE and manual transmission service
- Differential and gear rebuilding in-house
- Aftertreatment and derate diagnosis
- Mixer, dump and refuse PTO hydraulics
Our 8-step repair process
A clear path from the first call to a tested component or machine returned to work.
Inspection
Disassemble and evaluate the complete failure.
Photos & video
Document condition and findings for a clear repair conversation.
Repair quote
Define the recommended work and quote before proceeding.
Approval
Confirm scope, urgency and the practical path forward.
Manufacturing
Machine, weld, rebuild or reverse engineer required components.
Testing
Verify operation and workmanship before release.
Shipment
Return the completed component or equipment to service.
Frequently asked questions
Are you a Mack dealer?
No — we are an independent repair shop that services Mack trucks. No affiliation is implied.
Do you work on Granite vocational trucks?
Yes — Granite dumps, mixers and vocational Macks are core work, including PTO and hydraulic systems.
Can you rebuild a Mack differential?
Yes — differentials and gears are rebuilt in-house; it is the trade this shop was founded on.
Related services
Emergency breakdown? Call the 24-hour rush line.
(949) 400-2937Schedule service or open a repair order
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