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24-Hour Rush Repair
Gear & final drive bench · Fontana, CA
Planetary Gearbox Repair in Fontana
Planetary gearboxes do the hardest reduction work on the machine — final drives, swing drives, track drives and wheel hubs — and they usually fail quietly, in contaminated oil, until the day they don't turn at all. Our Fontana shop rebuilds planetary gearboxes and final drives in-house and manufactures the sun, planet and ring gears that are no longer sold.
Gear & final drive bench · Fontana, CA
Final drives and planetary stages, rebuilt in-house
Track loader drive motors are a specialty of this shop, and the planetary stages inside them are core work: carrier pins and planet bearings renewed, gear teeth inspected and measured, housings checked for the wear that lets a stage destroy itself. When a gear set is obsolete, our gear manufacturing capability cuts a new set to the original geometry — the repair that turns a 'replace the whole drive' quote into a rebuild.
Brands we serviceCaterpillarBobcatKomatsuCaseJohn DeereTakeuchiKubota
Planetary Gearbox Repair in Fontana · Fontana, CA
Planetary gearbox gears manufactured at LA Trucks and Tractors in Fontana
The failure you can still save is the one you catch early
Planetary stages telegraph their condition in the oil: metal glitter, a burnt smell, or backlash you can feel at the sprocket means wear is already advanced — but a stage caught at that point is a rebuild, while a stage run to destruction takes the housing with it. If your final drive oil shows metal, treat it as an inspection call, not a detail. Regular hours Monday–Friday 6 AM–5 PM; the rush line answers 24 hours a day, every day of the year.
- Final drive and track drive rebuilding
- Swing drive planetary repair
- Sun, planet and ring gear manufacturing
- Carrier, pin and bearing renewal
- Drive motor and planetary stage service together
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
Can you rebuild a final drive with metal in the oil?
Usually, yes — metal in the oil means worn gearing or bearings, and a stage caught before the housing is damaged rebuilds well. The teardown measurement tells us exactly where it stands.
Do you manufacture planetary gears?
Yes. Sun, planet and ring gears for obsolete drives are cut in our own shop from the original parts' measurements.
Related services
Emergency breakdown? Call the 24-hour rush line.
(949) 400-2937Schedule service or open a repair order
Request a service call.
Include the make, model, symptoms, location, urgency and preferred service time. Your details open in a text to John so you can review them before sending.