Pick-up
Coordinate free equipment or component pick-up when applicable.
24-Hour Rush Repair
Gear & final drive bench · Fontana, CA
Planetary Gearbox Repair in Fontana
Planetary gearboxes do the heaviest reduction work on a machine — final drives, swing drives, track drives, wheel hubs — and they tend to fail quietly in dirty oil until the day they stop turning altogether. Top Notch Equipment Repair rebuilds planetary gearboxes and final drives in Fontana and manufactures the sun, planet and ring gears nobody sells anymore.
Gear & final drive bench · Fontana, CA
Final drives and planetary stages, rebuilt in-house
Planetary stages are core work here — track loader drive motors especially. Carrier pins and planet bearings are renewed, gear teeth inspected and measured, and housings checked for the wear that lets a stage eat itself. When the gear set is discontinued, our gear manufacturing cuts a new set to the original geometry, turning a 'replace the whole drive' quote into a rebuild.
Brands we serviceCaterpillarBobcatKomatsuCaseJohn DeereTakeuchiKubota
Planetary Gearbox Repair in Fontana · Fontana, CAThe 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.
Tell us the make, model, symptoms, where the machine sits and how urgent it is. Your details open as a text to the shop, ready for you to review before you send.