04 June.
Advice and maintenance

How do I know if a gearbox is out of order?

How can I tell if a gearbox is out of order?

The majority of components used in automotive engineering are subject to parts subject to wear. For this reason, the maintenance booklet specifies the frequency with which components must be be replaced. to be replaced. These include shock absorbers, which should be changed every 80,000 km, and brake pads, which have an average life of 30,000 km.

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Gearbox broken? We help you identify and order your model

Find out all there is to know about the indicators of an gearbox !

Gearbox failure: what are the indicators?

The robustness of the gearbox is remarkable. In theory, this transmission should last as long as long as the car itselfall makes and models combined. However, there are certain factors can alter this estimate!
Unforeseen unforeseen circumstancesUnforeseen circumstances, such as shocks and accidents, or careless errors, such as forgetting to carry out regular servicing and maintenance, can reduce the gearbox's lifespan. As a result, gearbox performance gradually diminish. At first, these anomalies are minor, but they can quickly get worse. If you don't react to the first symptoms, components may be damaged, rendering the gearbox unusable. In this case, you should consider replacing it in a specialist store. To avoid this happening, look out for signs of wear and tear.
The faults and symptoms listed in this article are the most common, although rarer faults can also occur. As soon as your gearbox shows changes in behaviorhave it checked as soon as possible. You may have the impression that the gearbox has become hard. This is not necessarily the symptom of a breakage, but it is it is essential to carry out a few checks. Start by checking the clutch pedal to ensure that its travel is not impeded by garbage, gravel, mud or a floor mat that is too thick or poorly positioned.

A few warning signs!

Here the most common signs of a gearbox malfunction. gearbox operation. If you notice one or more of these warning signals, or other abnormal signs, it's best to stop using the car. Contact a professional and make an appointment to have your gearbox diagnosed. Here's a list of some wear indicators that may alert you to the problem :

Difficult shifting

If only one gear ratio shifts badly, it means that one of the parts connected to the gear ratio in question is faulty. This is usually the synchronizer, but other components may also be at fault. Sf several or all gear ratios are hard and difficult to shift, wear of the synchronizer rings and linkage are often to blame. These worn parts are no longer able to perform their function, which is to transmit the lever command inside the gearbox to engage the desired gear. The hardness of several gears may also be due to a failure of the flywheel or the clutch system.

Speed commitment

If your gear engages normally, but tends to disengage on its own, particularly when you accelerate, the gearshift lever returns to neutral without any intervention on your part. This means that the gear "jumps", which is often the consequence of a linkage or synchronizer failure.

Continuous whistling 

If you hear a kind of whistling sound coming from the gearbox as the engine revs up, and this noise disappears when the clutch is disengaged, it's probably a sign that the bearings worn. It's these parts that need replacing, not the whole gearbox.

Cracking sound

If you If you consistently hear cracking noises when shifting gears, whether or not associated with difficulty engaging gears, this symptom generally usually worn synchronizers. Gear selectors can also crack when the cables are incorrectly adjusted.

Muffled hum of the box

If you notice a low hum or buzz at certain speeds, it is possible that the gear teeth worn. If your gearbox makes an unusual noise when you accelerate, or when you use the engine brake, it's likely that the problem lies with the differential.

Transmission fluid leak

Check the gearbox oil level. If the fluid is insufficient the gears are poorly lubricated, forcing you to forcing the gearbox to respond to your manipulations. At the same time, check the clutch fluid level.
If you notice traces of gearbox oil under the housing, this indicates a gearbox oil leak. The housing may be punctured or poorly sealed. At first, you may not notice any suspicious noises or signs of low fluid. But if you let the problem linger there's a high risk that the gearbox will eventually break.. Never take a leak lightly!

Clutch fault

If you notice clutch slippagethat is, it no longer transmits power efficiently from the engine to the wheels, the gearbox or clutch needs to be inspected.

BVA

The automatic gearboxalso known asautomatic transmission"is not without its problems, although it is the result of more advanced technology than the manual gearbox. Sometimes, shifting becomes slow or irregular, which may indicate wear in the dual-clutch system. On the dashboard, warning lights may illuminate to indicate gearbox problems. Watch out for unusual symbols!

Gearbox failure: how to repair it?

Whether it's an automatic or manual gearbox, it goes without saying that any anomaly must be properly repaired. Otherwise, you won't be able to continue driving your vehicle without running the risk ofaggravate failures of the gearbox. The first thing to do is to note all the symptoms, in particular the gears defective you encounter. In fact, if your gearbox is faulty, you should contact a professional a professional mechanic and let him know about the signs of failure you have noted. He will be able to advise you to take the vehicle to his workshop, or have the car towed if the symptoms are likely to indicate critical, or even fatal, faults with your vehicle.or even fatal to your vehicle.

Step 2: Draining

The drain of the gearbox is usually carried out before removal. If necessary, the mechanic removes the gearbox oil after placing the BV on his work surface. A thorough cleaning of the gearbox. This is done with a brush dipped in petrol or diesel fuel, or with a steam cleaner.

Step 2: Gearbox removal

So that your mechanic can refine his diagnosisanalysis will depend on the transmission system and the type of gearbox. type of gearbox. Once your vehicle is in the hands of the mechanic, he can begin the checks. If your car has front-wheel drive, the gearbox may be located in front or behind the engine.
Different internal components need to be removed to gain access to the gearbox. In some cases, you'll need to remove the grille, the power train or even radiator. If your vehicle has a rear-wheel drive transmission, the gearbox is usually removed from the passenger compartment or from underneath. Depending on the transmission model of the car you're driveengine removal may also be necessary, so that the mechanic can safely disengage the gearbox.

Step 3: Gearbox disassembly

Once the gearbox has been removed and drained, the mechanic can begin disassembly to gain access to all parts, such as the secondary sprocketsecondary transmission rodsand internal components which will then be inspected. It's likely that he'll rotate the drive shafts to assess gear wear. He will also check that pinions are intact and in good condition.
At the same time, he will examine the bearing surface of the pinion gear to make sure there are no pits. This check continues until all gearbox components have been thoroughly inspected. The mechanic checks forno play and checks that all parts are securely fastened. He also checks the condition of the seals, verifies that all screws are present and working properly, and makes sure that the parts are not pierced, cracked or damaged in any way.

Step 4: Gearbox reassembly

Once all gearbox parts have been inspected and repaired (or replaced), the mechanic can proceed with reassembly. Gears, secondary shaft, seals, oil sump: each component is inspected and fastened with great care. Assembly is carried out in a specific specific order specific to your gearbox. As during removal, the mechanic may touch other mechanical components to ensure that the gearbox is installed correctly.

Step 5: Filling the gearbox

Next, the mechanic adds transmission oilan essential step to ensure proper lubrication of the entire gearbox. After this, a test phase is essential! The mechanic must make sure :

  • Make sure the gears turn properly;
  • Quiet, smooth gear changes; 
  • That there are no oil leaks.

Other checks are obviously going to be carried out, and this calls for meticulous meticulousand impeccable control of the gearbox mechanism!

Practical info!

For automatic gearboxes gearboxes, are not limited to mechanical components, but also incorporate electrical and electronic systems. For this reason, it's essential that the garage mechanic checks that the correct operation of these components. A complete reprogramming is often necessary before the gearbox can perform its functions properly.

Replace or repair the gearbox?

As the mechanic evaluates the gearbox, he will identify defective components such as synchro rings, bearings and similar parts. He then draws up a list of components requiring immediate replacement, and those recommended for replacement.
Based on the diagnostic findings, the professional will be able to determine ifit is necessary to rreplace the gearbox gearbox. Before proceeding with this replacement, it is crucial to know the exact part number of the gearbox, to ensure that you purchase a compatible model.purchase of a compatible model. Your garage will be able to provide you with this information. If necessary, a replacement gearbox matching your vehicle's specific model can be found.
Only after you have carried out a series of series of checks and tests, the mechanic will be able to return a fully operational gearbox. The intervention is covered by a warranty that will enable you to travel many kilometers with complete peace of mind.
Before you back on the roadbe sure to ask about maintenance and their frequency. Keep in mind that maintaining your gearbox in good condition is crucial to avoid breakdowns ! Don't hesitate to ask your garage if he/she has any additional tips on how to prevent malfunctions.

Gearbox out of order: where can I find a replacement part?

You have now taken the first step towardspurchase a transmission or manual transmission, i.e. knowing the part number to look for. Now you can start compare existing offers and avoid the pitfalls! When a gearbox breaks down beyond repair, you'll often have to look for a new one. often incur a substantial price tag for replacement.

It's quite understandable that you're looking for affordable parts as a priority, but this shouldn't be at the expense of product reliability. As we said earlier, a gearbox should last as long as your vehicle is used, and should be operational for at least a few hundred thousand kilometers.

In this sense, the your choice of supplier is extremely important! Make sure you use a platform that exclusively offers gearboxes that have been tested by experts and covered by a parts warranty.

EDEN BOITES unique offers and quality services

At EDEN BOITES, each of the 12,000 products available in our 7 warehousing centers has first passed a series of rigorous and demanding checks.

In the entry-level range, we offer used gearboxes. By definition, these are mechanical components that have previously been used on other vehicles, which does not call into question their reliability. ! After careful evaluation, our specialists define the warranty period, which corresponds to 3 months minimumdepending on the characteristics of the pre-owned product. Please note that these products are not suitable for vehicles subject to heavy use.

Standard exchange, reconditioning, warranty: the solutions offered by EDEN BOITES

We're moving upmarket with gearboxes in standard exchange : lhile prices are higher, guaranteed performance is also better! This product category comes with a 12-month warranty and is perfectly suited to intensive use. In other words, it's better to invest in a manual gearbox or an automatic gearbox as a standard exchange if you're used to long journeys or if you drive your car regularly.

 

We take care to regularly replenish our stock ensuring that a wide range of products is available to our customers. Despite this, the possibility that the product you need is not in stock cannot be ruled out... But don't worry! We have an excellent alternative that will enable you to reduce your expenses, fight waste and enjoy a like-new gearbox: the 0 km rebuild of your defective part, more simply known as reconditioning of your gearbox.

EDEN BOITES a gearbox expert

EDEN BOITES occupies a leading position market leader in Francebut also on a European scale. Our success is based above all on the rigorous attention we pay to the quality of our gearboxeswhile offering competitive prices that enable you to control reconditioning costs. What's more, we cover the whole of Europe. Whether you supply an address in France or another European country, we guarantee that your gearbox is dispatched rapidly by experienced carriers.

Don't wait until your gearbox problems are more serious to request your free quotation ! You'll receive a personalized personalized, no-obligation quotation by return e-mail. Are you happy with the proposal? Confirm your order and take advantage of the many secure payment solutions we offer available to you. Your faulty gearbox will soon be a distant distant a distant memory, and you'll be able to hit the road again withpeace of mind!

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