Collection
Where it applies, we arrange collection of your machine or component at no charge.
24-Hour Rush Repair
The gear & final drive bench · Fontana, CA
Planetary Gearbox Repair in Fontana
On any machine, the hardest reduction work falls to the planetary gearboxes — final drives, swing drives, track drives and wheel hubs — and their failures usually develop quietly in contaminated oil, right up to the day they stop turning altogether. Planetary gearboxes and final drives are rebuilt in-house at our Fontana shop, and the sun, planet and ring gears that are no longer sold get manufactured here.
The gear & final drive bench · Fontana, CA
Final drives and planetary stages, rebuilt under our roof
Drive motors for track loaders are a specialty of this shop, and the planetary stages inside them are core work: carrier pins and planet bearings get renewed, gear teeth are inspected and measured, and housings are checked for the kind of wear that lets a stage tear itself apart. When a gear set turns out to be obsolete, our gear manufacturing capability cuts a fresh set to the original geometry — the repair that converts a 'replace the whole drive' quote into a rebuild.
Brands we serviceCaterpillarBobcatKomatsuCaseJohn DeereTakeuchiKubota
Planetary Gearbox Repair in Fontana · Our Fontana, CA workshopA failure caught early is a failure you can still save
The oil tells you what shape a planetary stage is in: metal glitter, a burnt smell, or backlash you can feel at the sprocket all mean the wear is already well advanced — yet a stage caught at that point is still a rebuild, whereas one run to destruction takes its housing down with it. Metal showing in your final drive oil should be treated as a reason to call for an inspection, not as a minor detail. Regular hours are Monday–Friday 6 AM–5 PM, and the rush line answers 24 hours a day, every day of the year.
- Rebuilding final drives and track drives
- Planetary repair for swing drives
- Manufacturing sun, planet and ring gears
- Renewing carriers, pins and bearings
- Drive motor and planetary stage serviced together
How every repair moves through the shop: 8 steps
From your first phone call through final testing, here is how a job moves through the shop.
Inspection
We strip the unit down and assess the full extent of the failure.
Photo & video record
We photograph and film what we find, so the repair discussion is based on evidence.
Written quote
You receive a written price for the recommended scope before any work starts.
Approval
Together we agree the scope, the priority and the most sensible way ahead.
Manufacturing
Any parts the job needs are machined, welded, rebuilt or reverse engineered in-house.
Testing
Nothing leaves until operation and workmanship have both been checked.
Return delivery
The finished machine or component goes back to you ready for service.
Questions customers ask us
Is a final drive with metal in its oil still rebuildable?
Usually it is — metal in the oil points to worn gearing or bearings, and a stage caught before housing damage has occurred rebuilds well. Measuring everything at teardown tells us exactly where yours stands.
Are planetary gears manufactured here?
Yes. For obsolete drives, sun, planet and ring gears are cut in our own shop, working from measurements taken off the original parts.
More services you may need
Down right now? Ring the round-the-clock rush line.
(949) 400-2937Book a service visit or start a repair order
Ask for a service visit.
Tell us the make and model, what it is doing, where it sits, how urgent it is and when suits you. The form opens your details as a text message to John, so you can check everything before you hit send.