Fiat Fullback gearbox repair guide

This versatile pickup offers a choice of gearboxes. With manual or automatic transmissions, they are designed to optimize driving and load capacity. However, despite regular maintenance, this mechanism may show signs of malfunction requiring immediate attention.

In this guide, we'll explore the telltale signs of a faulty gearbox, as well as repair solutions depending on the problem. EDEN BOITES tells you all about it.

Fiat Fullback gearbox malfunction warning signs

The Fiat Fullback is a vehicle with all-wheel drive, which can be engaged on the first trim levels, and is permanent thereafter. All-wheel drive is made possible by a 6-speed manual or 5-speed automatic gearbox. Designed for professional use, it is ideal for climbing, crossing or loading. Whatever the model, there are several symptoms that betray the failings of the Fiat Fullback's gearbox:

If your vehicle is equipped with a manual gearbox, take care when :

• A continuous snoring sound can be heard;
• The gearshift lever cannot be engaged in one or more positions;
• Cracking n oises can be heard when shifting gears;
• Engaging relationships is complicated;
• Gears skip;
• The transmission system is particularly noisy;
• You notice oil leaks under the gearbox housing.

For automatic gearboxes, be careful if :

• Gear change is inappropriate or delayed.
• You hear unusual noises.
• There's a strange smell during gear changes.
• You notice a loss of transmission fluid with stains under the car.

Gearbox repair: disassembly steps and detailed process

Repairing a gearbox is a complex process. For this reason, calling in a professional is often the best solution, for reasons of quality and expertise.

To dismantle your gearbox, you will need :

• remove the screws securing the rear housing extension ;
• Remove the pinion by sliding it on its shaft;
• remove axle locking bolt ;
• loosen another bolt on the secondary shaft;
• extend the gearbox.

In addition to the specific tools required to undertake such work, you need to consult an expert to find the best solution for your gearbox's symptoms.

The guide: our top tips for repairing the Fiat Fullback gearbox

When gear changes seem uncontrolled, we recommend checking the selector rod adjustment and possibly retightening the gearbox support.

If it's just the gearshift cable, simply replace the three connecting rods, which are easy to spot by running your hand along the bottom of the engine.

Unusual noises may indicate worn synchronizing sleeves or damaged teeth. Made of brass alloy, these bushes are subject to heavy wear and tear. To replace them, once the gearbox has been removed, the synchronizer hub must be dismantled and slid to disengage both ends. The balls and springs are then cleaned before installing the new gearbox synchronizer.

If engaging a gear is difficult, it may be necessary to change theclutch pressure plate, which may be deformed or damaged.

Finally, if you detect oil leaks, check the gearbox cap. If it's properly installed, it could be a faulty seal or a crack. Weak transmission fluid can lead to gear skipping, abnormal noises or overheating. This is the main cause of transmission problems. Gearbox oil needs to be changed regularly, and leaks identified as soon as possible.

The diagnosis may lead to various interventions, depending on the problem encountered. Repair or replacement. In the latter case, EDEN BOITES can supply the Fiat Fullback 2.4 CDI 4×4 gearbox for installation by your garage.

You can have them delivered to your home or directly to your repairer, and benefit from a choice of extended warranties, as well as great savings. Visit our online store!