HEAVY PLANT DRIVETRAIN SPECIALISTS
When your heavy plant or diesel machinery loses drive, every hour of downtime costs your operation money. CMKT Engineering delivers professional transmission repairs in Gauteng — diagnosing the exact root cause and restoring your drivetrain to full working order as quickly as possible.
TRANSMISSION REPAIRS IN GAUTENG
Our transmission repair capability spans a wide range of heavy plant and diesel-powered machinery. We do not subcontract and we do not guess — we diagnose, strip, measure, machine where necessary, and rebuild to specification.
Excavators, TLBs, dozers, front loaders, graders, and bobcats all place enormous stress on their transmission and transfer systems. We carry out plant machinery gearbox repair across all these machine categories — stripping completely, inspecting every gear, shaft, bearing, seal, and clutch element, measuring against manufacturer tolerances, and replacing what does not pass.
Rollers, compactors, crushers, and water trucks all depend on reliable transmission systems. Rollers in asphalt and compaction work are subjected to repeated forward and reverse cycling that accelerates clutch and valve body wear. CMKT provides transmission overhaul services for road and civil equipment across Gauteng.
Ten cubic tipper trucks form the backbone of earthworks and material haulage on construction and mining sites. Our service covers both manual and automatic gearbox rebuilds, including torque converter reconditioning, valve body overhaul, and electronic range selector attention where fitted.
ENGINE PLATFORMS WE WORK WITH
Our transmission work is never done in isolation from the rest of the drivetrain. Because our team is qualified to work across all major heavy diesel engine platforms, we can identify and address related faults in the same service event — reducing your total downtime significantly.
OUR PROCESS
Thorough assessment of the machine and the transmission complaint. We gather operational history, conduct a drive or operational test where mobile, and inspect fluid condition, pressure levels, and visible external damage. Electronic diagnostic tools where applicable; mechanical pressure testing and physical inspection where required.
Every component cleaned and inspected individually. Gear teeth checked for wear patterns, pitting, and breakage. Bearings measured for clearance and race condition. Clutch packs checked for thickness, wear, and glazing. Seals and O-rings replaced as a matter of course. Valve bodies flushed, disassembled, and inspected for scoring. Findings documented and presented to the client before proceeding.
Where components require machining to restore tolerances, CMKT’s in-house machine work capability is available. Shafts reground, housings bored, mating surfaces refaced — without depending on expensive pre-machined replacement parts for every job. Better pricing and faster turnaround for our clients.
Assembly carried out to manufacturer specifications using calibrated torque equipment. Clutch clearances set precisely, end-float measurements taken and recorded, all fluid passages verified clear before the unit is sealed. New seals, gaskets, and filter elements fitted as standard.
Machine tested under load conditions to verify correct operation across all ranges. Fluid temperatures, pressures, and shift quality all observed and confirmed before the machine is returned to service.
WHY TRANSMISSIONS FAIL
Gauteng’s construction and mining sites generate enormous amounts of dust and particulate material. When breather caps fail or seals weep, contamination enters transmission fluid rapidly. CMKT always investigates the source of contamination before completing a rebuild to prevent the new transmission suffering the same fate.
Plant operators under production pressure sometimes push machines beyond rated capacity. TLBs used outside their design envelope, front loaders carrying overweight buckets, and tipper trucks running overloaded all place excessive torque through transmission components. We identify the wear signatures associated with overloading and advise on operational adjustments.
Transmission filters require regular replacement. In South Africa’s load shedding environment, plant often runs extended hours to compensate for lost production time, and service intervals are sometimes stretched. A blocked filter starves the transmission pump and causes pressure drops that lead to clutch pack slippage.
Lip seals, shaft seals, and O-ring faces degrade with heat cycling and age. Our plant machinery gearbox repair always includes a full seal replacement programme as part of the rebuild, regardless of the apparent condition of individual seals.
WHY CMKT ENGINEERING
Every transmission and drivetrain job is handled by qualified tradesmen. Clement Tapera (Automotive Engine Fitter) and Farai Zhou (Diesel Plant Fitter) mean clients are not handing their equipment to general mechanics working outside their competence.
From John Deere TLBs to Caterpillar dozers, from Cummins-powered tipper trucks to Weichai-engined crushers — we have the knowledge base to work on the equipment that actually operates on Gauteng’s construction, mining, and civil sites.
We provide honest, itemised quotations before work proceeds. As a general guide: lighter plant transmission overhauls typically R8 000 to R25 000. Larger, more complex units on dozers and excavators from R30 000 to R80 000 or more. Accurate written estimate provided after inspection, no obligation to proceed.
CMKT covers diesel engine overhauls, hydraulic component repairs, turbocharger repairs, injector pump reconditioning, and engine dynamometer testing alongside transmission work — all powertrain issues addressed in a single relationship with a single team.
WHAT CLIENTS SAY
Our Cummins QSL9 on a SANY excavator seized up mid-project on a site in Gauteng. CMKT had it overhauled and back on the dynamometer within two weeks. The written report showed the engine performing to specification. We put it back into service with full confidence.
What impressed me most was that they offered us a replacement TLB while our machine was in for a full engine overhaul. No downtime on our roadworks contract. The machine came back fully tested and has given us no trouble since. Proper professionals.
We needed a 10 ton roller and a tipper truck for a roadworks contract in Limpopo and could not afford downtime on either unit. CMKT sorted both engine issues, tested the rebuilt units, and provided written reports before handover. We completed the contract on schedule.
We are based in Gauteng and travel to client workshops and field sites across South Africa. If your machine needs transmission work — or your equipment is down in the field — we will get to you.
Based outside these areas? WhatsApp us on +27 74 578 3032 and we will find a plan that works for you.
COMMON QUESTIONS
Timelines depend on the size and complexity of the unit and the availability of parts. A TLB transmission overhaul can typically be completed within three to seven working days once parts are confirmed. Larger units on dozers and excavators may take one to two weeks. We give clients a realistic timeline upfront and communicate immediately if anything changes during the strip and inspection phase.
Yes. CMKT Engineering operates field response capability across Gauteng. For transmission work that requires workshop facilities, we coordinate on-site removal and transport. Contact us on arrival of the fault and we will assess the fastest response route.
CMKT stands behind the quality of our workmanship. Warranty terms are discussed and agreed at the time of quotation. We are committed to getting every rebuild right the first time, and we take responsibility for the work we carry out.
We work hard to source correct parts for the full range of equipment we service. For older machines or less common makes, lead times for imported components can vary. We are transparent about parts availability and lead time when quoting, and we discuss options for reconditioning serviceable components versus wholesale replacement wherever this is engineering sound.
Yes. We frequently assess transmissions that have failed after repair elsewhere. In these cases, our strip and inspection process identifies both the original fault and any issues introduced during a previous repair attempt. We provide a full report of our findings before proceeding with any reconditioning work.
Do not let a transmission fault shut down your operation. Contact CMKT Engineering and Projects for professional, honest, and fast transmission repairs across Gauteng.
CONTACT US
Contact our team to discuss your machine, get a written quote, or arrange field response.
