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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.

Duration300 h
ModeOnline
LanguageEnglish
Start datesSet by the faculty
AwardSEIUM Institute certificate
Enrol now View syllabus Ask an advisor
Virtual lab · try it before you enrol

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.

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Learning outcomes

What you will be able to do

01

Explain how the electrohydraulic overdrive works.

02

Analyse the epicyclic gear train, the conical clutch and the hydraulic circuit.

03

Diagnose hydraulic and electrical faults in the overdrive.

04

Disassemble and repair the unit using the appropriate tools.

05

Assemble, adjust and check the operating pressure.

06

Select the correct lubricant and define the maintenance schedule.

07

Prepare a final project on the repair of an overdrive.

Profile

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.
Standards & tools

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)
Syllabus

6 modules · 300 h

  1. 1.1What an overdrive is used for
  2. 1.2Common models and their applications
  3. 1.3Fitting to the gearbox
  4. 1.4Electrical and safety control
  5. 1.5Fuel economy and engine speed benefits
  6. 1.6Symptoms of a faulty overdrive
  7. 1.7Documentation and exploded diagrams
  8. 1.8Specific tooling required
  9. 1.9Identifying the fitted model
  10. 1.10Workshop: identification and initial diagnosis
  1. 2.1Epicyclic gear train and how it works
  2. 2.2Conical clutch and its positions
  3. 2.3Oil pump and working pressure
  4. 2.4Relief valve and its adjustment
  5. 2.5Solenoid and control valve
  6. 2.6Actuating pistons
  7. 2.7Freewheel
  8. 2.8Complete oil circuit
  9. 2.9Engagement sequence
  10. 2.10Practical: study of a disassembled assembly
  1. 3.1Failure to engage: possible causes
  2. 3.2Failure to disengage: risk and action
  3. 3.3Slow or abrupt engagement
  4. 3.4Measuring oil pressure
  5. 3.5Electrical check of the solenoid
  6. 3.6Safety and reverse switches
  7. 3.7Oil level and condition
  8. 3.8Internal and external leaks
  9. 3.9Logical order of diagnosis
  10. 3.10Practical: guided diagnosis of three faults
  1. 4.1Separating the unit from the gearbox
  2. 4.2Orderly disassembly
  3. 4.3Conical clutch and its lining
  4. 4.4Pump and its wear
  5. 4.5Valves and seats
  6. 4.6Gaskets, O-rings and seals
  7. 4.7Bearings and bushes
  8. 4.8Filter and its cleaning
  9. 4.9Discontinued parts and alternatives
  10. 4.10Practical: rebuilding a unit
  1. 5.1Assembly and torque values
  2. 5.2Adjusting the working pressure
  3. 5.3Bench testing where possible
  4. 5.4Filling and oil type
  5. 5.5Bleeding the circuit
  6. 5.6Fitting to the vehicle
  7. 5.7Electrical installation and safety
  8. 5.8Road test
  9. 5.9Temperature checks
  10. 5.10Practical: complete commissioning
  1. 6.1Correct use by the driver
  2. 6.2Gears in which it should be used
  3. 6.3Risk of operating in reverse
  4. 6.4Periodic maintenance
  5. 6.5Oil and filter change
  6. 6.6Preserving the unit if removed
  7. 6.7Common workshop errors
  8. 6.8Spare parts and specialists
  9. 6.9Documented real cases
  10. 6.10Final project: documented repair of an overdrive
Methodology, software & labs

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.

Accreditable laboratories(EN ISO/IEC 17025) with a rotor test rig, EMC/Lightning pre-compliance, HIL/SIL, vibration/acoustics.
Evidence-oriented Master's Thesis:safety case, test plan, compliance dossier and operating limits.
Industry mentorship:lecturers with experience in training, , eVTOL/UAM and flight test.
Flexible format(hybrid/online), international cohorts and support from SEIUM Career Services.
Ethics and safety:a safety-by-design approach, cyber-OT, DIH and compliance as its pillars.
Capstone project

Build it end to end

Your final project follows the real engineering workflow, step by step, reviewed by your tutor.

Correct use by the driver

Explain how the electrohydraulic overdrive works.

Gears in which it should be used

Analyse the epicyclic gear train, the conical clutch and the hydraulic circuit.

Risk of operating in reverse

Diagnose hydraulic and electrical faults in the overdrive.

Periodic maintenance

Disassemble and repair the unit using the appropriate tools.

Oil and filter change

Assemble, adjust and check the operating pressure.

Career opportunities

Where this takes you

Classic transmission technicianOverdrive mechanicClassic vehicle restorerGearbox rebuilderTransmission diagnostics technicianWorkshop manager in classic mechanics
Admissions & scholarships

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.

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FAQ

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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