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0 of these 24 mechanics are in Ontario; the rest are in Fontana, Rancho Cucamonga and Brea.
None of the 24 mechanics listed here are in Ontario itself; they are in towns including Fontana (6), Rancho Cucamonga (6), Brea (4). 42 mechanics in Ontario are on file in total; the list shows the highest-rated.
Ratings range from 4.3 to 4.9 across 2,452 reviews; 18 mechanics have 50 or more reviews; 22 are rated 4.5 or higher.
2 mention certified staff (ASE).
2 describe themselves as family- or locally-owned.
Services most often listed on their websites: auto repair (2), brakes (2), car air conditioning (2), steering and suspension (2) and wheel alignment (2).
In structured review feedback, customers of these mechanics most often flagged professionalism (100%), quality (83%) and value (79%).
18 of the 24 mechanics have a website on file; 6 publish a contact page; 4 list a public email; 4 take online bookings.
6 of these mechanics have had their website domain for ten or more years; the oldest was registered in 2000.
Figures are counted over the mechanics on this page from public listings and company websites collected in 2026; distances are straight-line; hours and prices change, so confirm before you visit.
The 24 shops on this page work on transmissions in and around Ontario, CA. What each one says about rebuilds, warranty terms and the brands it handles comes from its own website; ratings and quotes come from public reviews.
If it is slipping badly, overheating or stuck in limp mode, have it towed. Driving a failing transmission turns worn friction material into metal in the fluid, and that debris can make a repairable unit a replacement. Short and slow beats highway speed if you must move it.
On a manual, the engine revs climb without the car speeding up, usually in a high gear on a hill. The bite point creeping toward the top of the pedal travel is the other sign. A crunch going into gear points more at a worn synchro or the clutch not releasing fully.
Weigh the repair against what the car is worth running, and against what else is tired on it. A sound body, good engine and fresh tires argue for fixing it. Rust, a burning engine and worn suspension argue the other way. Ask the shop what it would do with the car.
Excerpts from public reviews of the mechanics listed on this page.
