Motor Vehicle Expert
MOT Question Guide

Does MOT Check Gearbox UK?

An MOT does not check the gearbox in the same way a garage diagnoses transmission wear, gear selection faults, clutch drag, automatic gearbox problems or internal gearbox damage.

However, gearbox-related problems can still matter if they affect safe control of the vehicle, prevent the tester from moving the car, create serious oil leaks, cause insecure mountings or make the vehicle unsafe to operate.

This guide explains what the MOT does and does not check, whether gearbox faults can fail an MOT, what symptoms to take seriously and what to inspect before test day.

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Quick answer

Does an MOT check the gearbox?

No, not as a full gearbox inspection. The MOT does not dismantle the gearbox, check internal wear, measure clutch drag, assess synchro wear, test automatic gearbox oil condition or predict future transmission failure.

A car can pass an MOT with a noisy gearbox, worn gearbox, slightly notchy gear change or developing transmission fault if it remains safe and roadworthy during the test.

But if the gearbox fault affects safe control, prevents the car from being moved, causes a serious leak or is linked to unsafe mountings, it can become relevant.

Mechanic answer

Gearbox condition is not fully tested, but control still matters

The MOT is not a gearbox health check. It is focused on roadworthiness. That means a tester is not assessing long-term gearbox reliability.

The key question is whether the vehicle can be moved, controlled and tested safely. Serious gearbox, clutch or drivetrain problems can affect that.

Does MOT Check Clutch? P0700 Gearbox Code
MOT scope

What Does The MOT Check Around Gearbox Problems?

The MOT does not diagnose the gearbox internally, but related safety issues can still be noticed.

Control

Safe vehicle movement

The vehicle must be capable of being moved and controlled safely during the test. If it cannot be driven or manoeuvred, the test may be affected.

Leaks

Transmission fluid leaks

A serious gearbox or transmission fluid leak may be relevant if it creates a safety, environmental or roadworthiness issue.

Mountings

Engine and gearbox mountings

Worn or insecure mounts can cause excessive drivetrain movement and may be inspected if visible or safety-related.

Engine mount MOT guide →
Noise

Severe mechanical noise

Noise alone is not always an MOT failure, but severe mechanical faults affecting safe operation should be checked.

Warning lights

Transmission warnings

A gearbox warning light should be diagnosed, especially if the vehicle is in limp mode or shifts dangerously.

Diagnostics hub →
Drivability

Loss of drive

A vehicle that cannot move reliably or safely may not be suitable to continue driving, even if gearbox wear itself is not a standard MOT item.

Not checked

What Gearbox Items Are Not Normally Checked During An MOT?

These gearbox-related areas are important for repair decisions, but they are not normally tested as part of a standard MOT.

Gearbox item Directly checked? Explanation
Internal gearbox wear No The gearbox is not dismantled or inspected internally.
Synchro wear No Crunching or notchy gears may be a repair concern but are not measured as part of the MOT.
Automatic gearbox oil quality No ATF quality, age and service interval are not checked during the MOT.
Future gearbox reliability No A passed MOT does not mean the gearbox will not fail later.
Gearbox bearing wear No Internal bearing noise is not diagnosed unless it affects safe operation.
Clutch drag No The MOT is not a clutch or gearbox diagnostic test.
Dual-clutch or CVT condition No Complex automatic transmission health is outside standard MOT scope.
Symptoms

Gearbox Symptoms To Check Before An MOT

These symptoms do not always mean MOT failure, but they should be investigated before the problem becomes unsafe or expensive.

Difficulty selecting gears

Hard gear selection may be clutch, linkage, gearbox oil, mount or internal gearbox related.

Gearbox crunching

Crunching can point to synchro wear, clutch drag, low fluid or driver technique issues.

Gearbox whining

Whining noise may indicate bearing wear, low oil or internal gearbox wear.

Whining noise guide →

Jumping out of gear

This can be serious and should be inspected before continuing to drive.

Gearbox oil leak

A leak can worsen and cause expensive internal gearbox damage if ignored.

Failure risk

Can A Gearbox Fault Fail An MOT?

Most internal gearbox faults do not fail directly, but some gearbox-related problems can affect roadworthiness.

Gearbox issue Direct MOT fail? Why it matters Best action
Notchy gear change Usually no Not a full gearbox diagnosis Monitor and inspect
Gearbox whine Usually no Internal wear not normally tested Check oil level and diagnose
Difficulty selecting gears Possible May affect safe control or testability Inspect clutch/linkage/gearbox
Jumping out of gear Possible Can affect safe control Repair before MOT
Loss of drive Possible Vehicle may not be controllable or testable Do not continue driving
Gearbox oil leak Possible Safety/environmental concern if severe Repair leak
Broken gearbox mount Possible Excessive movement can be unsafe Repair before MOT
Transmission warning light Not always direct May indicate serious drivability issue Scan and diagnose
Leaks

Can a gearbox oil leak fail MOT?

A gearbox oil leak can become relevant if it is serious enough to create a safety, environmental or roadworthiness issue. Light misting may be less serious, but active dripping should be investigated.

Gearbox oil leaks should not be ignored because low oil can damage internal bearings and gears. Automatic gearbox fluid loss can also cause shifting problems.

Do not confuse leaks

Gearbox oil, engine oil or clutch fluid?

Leaks around the engine and gearbox area can be confusing. What looks like a gearbox leak may be engine oil, clutch hydraulic fluid, driveshaft seal leakage or power steering fluid depending on the vehicle.

A proper inspection should identify the source before replacing parts.

Does MOT Check Engine Oil? →
Before MOT

What should you check if the gearbox feels wrong?

  • Check if all gears select normally.
  • Listen for gearbox whine or grinding.
  • Check for fluid leaks under the car.
  • Notice if the car jumps out of gear.
  • Check for clutch slip or clutch drag symptoms.
  • Check for warning lights or limp mode.
  • Look for excessive engine or gearbox movement.
  • Scan for transmission fault codes if automatic.
  • Do not ignore loss of drive or harsh shifting.
  • Repair serious control issues before MOT.
Best order

Diagnose before assuming the gearbox is finished

Gearbox symptoms can be caused by clutch faults, linkage issues, low fluid, mounts, sensors, wiring, software or internal wear.

The best order is:

  1. Confirm the symptom on a test drive.
  2. Check for leaks and fluid issues.
  3. Check clutch operation.
  4. Inspect gearbox and engine mounts.
  5. Scan for transmission codes on automatics.
  6. Only price gearbox repair after diagnosis.
Cost guide

Gearbox Repair Cost UK

Gearbox repair cost varies massively depending on whether the issue is fluid, linkage, clutch-related, mount-related or internal gearbox failure.

Lower cost

Linkage or mount issue

Some gear selection problems are caused by linkage or mount issues rather than internal gearbox failure.

Medium cost

Fluid leak or clutch issue

Leaks, clutch hydraulics or clutch replacement can be costly but may avoid gearbox replacement.

High cost

Internal gearbox repair

Internal gearbox or automatic transmission repair can be one of the more expensive vehicle repairs.

Repair Typical UK cost range
Gearbox diagnosis£60–£150
Gear linkage repair£80–£350+
Gearbox mount replacement£100–£350+
Gearbox oil leak repair£120–£600+
Clutch replacement£400–£1,200+
Manual gearbox replacement£700–£2,500+
Automatic gearbox repair£1,000–£5,000+
Frequently asked questions

Does MOT Check Gearbox FAQs

Clear answers to common UK driver questions about gearbox condition, gear selection, leaks and MOT inspections.

Does MOT check gearbox?

No. The MOT does not include a full internal gearbox inspection.

Can a gearbox fault fail MOT?

Possibly, if it affects safe control, creates a serious leak or prevents the vehicle being tested safely.

Does MOT check gear selection?

Not as a full gearbox diagnosis, but the vehicle must be capable of being moved and controlled safely.

Can gearbox oil leak fail MOT?

Yes, if the leak is serious enough to create safety, environmental or roadworthiness concerns.

Can automatic gearbox warning light fail MOT?

Not always directly, but it should be diagnosed because it may point to serious drivability or transmission problems.

Can a car pass MOT with a noisy gearbox?

Yes, if the noise does not affect roadworthiness or safe operation, but the fault should still be inspected.

About this guide

Practical gearbox and MOT advice for UK drivers

Motor Vehicle Expert publishes UK-focused MOT, diagnostics, warning light, repair cost and used car guidance in clear mechanic-style language.

This guide helps drivers understand whether gearbox condition is checked during an MOT and when gear selection, transmission leaks or drivetrain issues may affect the test result.