Overdrive Laycock Repair Course
Online 300 h course in Overdrive Laycock repair. 6 modules covering ISO 4406 (hydraulic fluid cleanliness code), ISO 4413 (hydraulic power transmissions: safety) and advanced Excel (pressure logging). Assigned tutor and open enrolment.
Overdrive Laycock Repair Course — studying from South Africa
Classic vehicle restoration is a niche but active interest in South Africa, supported by owners' clubs, specialist workshops and historic motorsport events. Restoration work draws on skills in mechanical engineering, materials and heritage conservation. Specialists source parts, rebuild engines and conserve bodywork for vintage and classic cars and motorcycles. Clubs and heritage organisations help maintain the community and promote conservation practice.
Fees for South Africa: R 8 340 (South African rand), with instalments and employer sponsorship available.
Relevant bodies in South Africa
Typical roles
Questions from South Africa
Will a SEIUM qualification be recognised by the professional bodies in South Africa for this area?
SEIUM qualifications are private and not accredited by any South African body, so they are not official state degrees. Restoration work is not generally a regulated title, though ECSA registration applies to engineering roles and the SABS covers relevant standards. Recognition of a private qualification is decided by clients, employers or the relevant body, so check with them first.
How might this qualification be used by employers in South Africa in restoration and classic vehicles?
The classic vehicle sector is largely made up of specialist workshops, collectors and small firms that value demonstrable craftsmanship and reputation over formal credentials. A private qualification may add technical depth to your profile, but its impact depends on individual clients and employers. Speak to people in the field to see how they would regard it.
Can I study this programme alongside full-time work from South Africa, and is there a time zone or language issue?
The programme is 100% online and taught in English, so you can study from home without a student visa. Master's programmes total 1,900 hours, postgraduate diplomas 800 hours and specialist courses 300 hours. You get an assigned technical tutor, can pay in instalments, and may seek employer sponsorship. Ask SEIUM about time-zone and workload details before committing.
Take the controls.
Run a real engineering trade-off from this field. Move the sliders, watch the model react in real time and beat the challenge.
What you will be able to do
Explain how the electrohydraulic overdrive works.
Analyse the epicyclic gear train, the conical clutch and the hydraulic circuit.
Diagnose hydraulic and electrical faults in the overdrive.
Disassemble and repair the unit using the appropriate tools.
Assemble, adjust and check the operating pressure.
Select the correct lubricant and define the maintenance schedule.
Prepare a final project on the repair of an overdrive.
Who it's for
- Classic transmission technician looking to specialise in Overdrive Laycock Repair.
- Overdrive mechanic looking to specialise in Overdrive Laycock Repair.
- Classic vehicle restorer looking to specialise in Overdrive Laycock Repair.
- Gearbox rebuilder looking to specialise in Overdrive Laycock Repair.
- Transmission diagnostics technician looking to specialise in Overdrive Laycock Repair.
- Workshop manager in classic mechanics looking to specialise in Overdrive Laycock Repair.
- Engineering or science graduates seeking to join transmission workshops.
What you'll work with
- ISO 4406 (hydraulic fluid cleanliness code)
- ISO 4413 (hydraulic power transmissions: safety)
- SAE J306 (gear oil viscosity)
- ISO 6722-1 (vehicle cables)
- ISO 286 (fits and tolerances)
- ISO 1940-1 (rotor balancing)
6 modules · 300 h
1.1What an overdrive is used for1.2Common models and their applications1.3Fitting to the gearbox1.4Electrical and safety control1.5Fuel economy and engine speed benefits1.6Symptoms of a faulty overdrive1.7Documentation and exploded diagrams1.8Specific tooling required1.9Identifying the fitted model1.10Workshop: identification and initial diagnosis
2.1Epicyclic gear train and how it works2.2Conical clutch and its positions2.3Oil pump and working pressure2.4Relief valve and its adjustment2.5Solenoid and control valve2.6Actuating pistons2.7Freewheel2.8Complete oil circuit2.9Engagement sequence2.10Practical: study of a disassembled assembly
3.1Failure to engage: possible causes3.2Failure to disengage: risk and action3.3Slow or abrupt engagement3.4Measuring oil pressure3.5Electrical check of the solenoid3.6Safety and reverse switches3.7Oil level and condition3.8Internal and external leaks3.9Logical order of diagnosis3.10Practical: guided diagnosis of three faults
4.1Separating the unit from the gearbox4.2Orderly disassembly4.3Conical clutch and its lining4.4Pump and its wear4.5Valves and seats4.6Gaskets, O-rings and seals4.7Bearings and bushes4.8Filter and its cleaning4.9Discontinued parts and alternatives4.10Practical: rebuilding a unit
5.1Assembly and torque values5.2Adjusting the working pressure5.3Bench testing where possible5.4Filling and oil type5.5Bleeding the circuit5.6Fitting to the vehicle5.7Electrical installation and safety5.8Road test5.9Temperature checks5.10Practical: complete commissioning
6.1Correct use by the driver6.2Gears in which it should be used6.3Risk of operating in reverse6.4Periodic maintenance6.5Oil and filter change6.6Preserving the unit if removed6.7Common workshop errors6.8Spare parts and specialists6.9Documented real cases6.10Final project: documented repair of an overdrive
How you'll learn
100 % online training on the SEIUM Institute campus, with downloadable material, recorded classes and an assigned technical tutor. No fixed timetable: students progress at their own pace within the intake, which makes it possible to combine study with work.
Each module combines theory, guided reading of the original standard and applied exercises. The working software is Advanced Excel (pressure logging), PicoScope (solenoid diagnosis), Fusion 360 (assembly tooling), in free, academic or evaluation versions. Tests are studied using real procedures for measuring the overdrive's hydraulic pressure, electrical diagnosis of the solenoid and switch, and road testing of engagement. Assessment is continuous by module, plus the final integrating project.
Build it end to end
Your final project follows the real engineering workflow, step by step, reviewed by your tutor.
Explain how the electrohydraulic overdrive works.
Analyse the epicyclic gear train, the conical clutch and the hydraulic circuit.
Diagnose hydraulic and electrical faults in the overdrive.
Disassemble and repair the unit using the appropriate tools.
Assemble, adjust and check the operating pressure.
Where this takes you
Requirements
- No prior qualification is required.
- Internet connection and a computer capable of running the programme's software.
- Sufficient Spanish to follow technical standards documentation.
Ready to start?
Send your application today. Our admissions team replies within 72 hours with your study plan and funding options.
Frequently asked questions
The programme totals 300 hours, spread over 3 to 5 months. That is between 10 and 15 hours a week on average, compatible with a full-time job.
You work with Advanced Excel (pressure logging), PicoScope (solenoid diagnosis) and Fusion 360 (assembly tooling). Free, academic or evaluation versions are used, and the tutor indicates the free alternative where one exists.
A SEIUM Institute diploma upon passing continuous assessment and the integrating final project. This is in-house training, not an official qualification from the Ministry.
Yes. Modules passed in a Course or Postgraduate Diploma in the same area are credited towards the higher programme. Check the recognition policy when you enrol.
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