Gearbox Repair

Gearbox repair for whining, jumping out of gear and difficult selection, diagnosed on site before any work is committed to.

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Service Info

Typical Duration 10 hours

We diagnose the fault on site, establish whether the gearbox, clutch or hydraulics are responsible, advise honestly on repair against replacement, and where a repair is appropriate carry out the work with the clutch inspected at the same time.

Skip the garage, our master mechanics come to you

At your home or office
Fair & transparent pricing
6-month, 6000km warranty

The Most Trusted Gearbox Repair

A gearbox rarely fails without warning. It whines, it becomes difficult to select a particular gear, it jumps out of gear under load, or it starts leaking. Repairing rather than replacing makes sense when the damage is confined to specific components, such as a worn synchroniser, a bearing or a selector fork. Michanic diagnoses gearbox faults at your home or office and, where a repair is the sensible route, arranges the work.

Why Choose Our Gearbox Repair Services?

  1. Diagnosis Before Commitment:
    Difficult gear selection is frequently a clutch or hydraulic fault, not a gearbox one. That distinction is worth thousands and is established first.
  2. Repair Versus Replace Assessed Honestly:
    Not every gearbox is worth repairing. We tell you when a replacement or reconditioned unit is the better value.
  3. Cause Investigated:
    Gearboxes fail from lack of oil, contaminated oil, or a failing clutch putting shock loads through them. Fixing the box without the cause repeats the failure.
  4. Clear Scope:
    This is major work. You get an honest account of what is involved before anything is dismantled.

Why We are the Best Choice for Gearbox Repair

  • Symptom Read Properly:
    Which gear is affected, and whether the noise changes with clutch position, narrows the fault before the box is opened.
  • Oil Condition Examined:
    Metal on the drain plug and the state of the oil are the clearest evidence of internal condition available without dismantling.
  • Clutch Assessed Together:
    Since the gearbox must come out, the clutch is inspected and usually renewed rather than refitted worn.
  • Road Tested Fully:
    Every gear is driven under load and on the overrun before the vehicle is handed back.

The most common cause of gearbox failure is simply running low on oil, often from a leaking seal nobody noticed. Gear oil is what separates hardened steel surfaces under enormous load, and once the level drops the bearings and gear faces wear rapidly and shed metal, which then circulates and accelerates everything else. That is why a small leak is worth fixing immediately, and why a whine that is ignored for months usually turns a repairable gearbox into a replacement.

Frequently Asked Questions

  • Is my problem the gearbox or the clutch?
    Difficulty selecting gears is more often a clutch or hydraulic fault than a gearbox one, because a clutch that does not fully release makes every gear hard to engage. Noise and jumping out of gear point at the gearbox itself.
  • Is it worth repairing a gearbox or replacing it?
    It depends on what has failed and on the vehicle. A single worn synchroniser or bearing is usually worth repairing. Widespread wear, damaged gear teeth or a cracked casing generally means a replacement or reconditioned unit is better value.
  • Why does my gearbox whine?
    Usually a worn bearing, and the pitch and when it occurs identify which one. A whine present in all gears but not neutral points at the input or output bearings, while one confined to a single gear suggests that gear or its bearing.
  • What causes a gearbox to jump out of gear?
    Worn selector forks, weak detent springs, worn synchroniser hubs, or in some cases a worn engine or gearbox mounting letting the drivetrain move. It needs investigation rather than being driven around.
  • Can low gear oil really destroy a gearbox?
    Yes, and it is the most common cause of failure. The oil is the only thing separating loaded steel surfaces, so once the level drops the wear accelerates quickly and the metal it sheds damages everything downstream.