Is it better to repair or replace a manual gearbox?
Whether to repair or replace a manual gearbox depends on what has failed, how far the damage has spread and what the car is worth keeping going.
There is no single answer, because it comes down to what has failed. A worn selector, a leaking seal or a noisy bearing can often be tackled on its own. Widespread gear damage or a cracked casing can push a decision towards a replacement unit.
Before anything is decided, the gearbox has to be diagnosed properly. Many drivers blame the gearbox for faults that actually come from the clutch, linkage or a driveshaft, and those are usually simpler to put right.
When can a gearbox be repaired?
Repair is realistic when the damage is limited and parts are available. Common examples include worn synchromesh that makes a gear crunch, a leaking input or output shaft seal, a tired selector mechanism or a failed bearing caught early.
The gearbox usually has to come out of the car for internal work, which is a big part of the labour. That is why a garage may suggest dealing with the clutch at the same time while access is open.
- Crunching going into one gear
- Oil leak from a seal
- Jumping out of gear
- Whining that follows road speed
When is replacement the better option?
If gears are chipped or broken, shafts are bent, or metal has circulated through the oil, repair can become a long list of parts. A reconditioned or replacement unit may then make more sense. Availability and suitability depend on the model.
The age and condition of the rest of the car also matter. We would talk it through with you rather than assume that bigger spending is needed.
What drives the cost of gearbox work?
We cannot quote figures without seeing the car, but the main drivers are easy to list. They are how much of the gearbox needs work, the price and availability of parts or a replacement unit, the labour to remove and refit it, and whether a clutch, flywheel or oil should be renewed at the same time.
Some vehicles are much harder to work on than others, which affects time. Ask for a quote with your registration and symptoms to hand.
What can I check before booking?
Look at the gearbox oil level only if your handbook shows how, as many have no dipstick. Note exactly what the fault is: noise in all gears or one, difficulty finding a gear, or a gear that will not stay in. Check the clutch pedal feel too, because a clutch fault can feel like a gearbox one.
Check the ground under the car for oil marks. Describing symptoms accurately saves diagnostic time, and that is part of what a garage charges for.
When should I stop driving?
Stop if the car will not go into gear, jumps out of gear while driving, or makes a loud grinding noise. A gearbox that locks or fails at speed is dangerous.
If you can only find some gears, do not rely on the car for long or busy roads. Get advice before making the journey.
If you are unsure whether a trip is wise, ask us before you set off. We would rather talk the symptoms through than have you risk a breakdown on a busy road.
Repair or replacement is only clear after an inspection, so start by describing the fault as exactly as you can. Automaster is at Longcombe Cross near Totnes, and we are happy to give you a quote once we know the symptoms.
Common questions
Can a gearbox noise be fixed without removing it?
Sometimes the cause is outside the gearbox, such as the clutch release bearing or a mounting. Internal faults usually need it removed.
Is a reconditioned gearbox as good as a repair?
It depends on the unit and who rebuilt it. We can explain the options for your vehicle once it has been inspected.
Should I change the clutch with the gearbox?
Often it makes sense, since the work to access both overlaps. We would check the clutch and tell you what we find.
Can a gearbox be repaired with the engine in place?
Rarely. Most internal gearbox work needs the unit removed from the car, which is why labour is a large part of the job.
More advice
Ask for a quote
Tell us the make, model, registration and what the car is doing, and we will come back to you. Prefer to talk? Call our quote line on 01803 862152.
Automaster, Longcombe Cross, Longcombe, Totnes TQ9 6PL, United Kingdom