Niva car – this is a legendary SUV, which comes with 1977 year and is very popular in many countries around the world. Niva has a unique design, which combines the advantages of all-wheel drive and plug-in four-wheel drive, as well as high maneuverability and reliability. One of the important elements of the Niva car is the gearbox., which ensures the transmission of torque from the engine to the wheels. In this article we will look at the features of the device, installations, withdrawals, Niva gearbox repair and maintenance.
Niva gearbox design
Niva gearbox – This is a manual five-speed gearbox with synchronizers in all gears, except the back. The gearbox has the following types and characteristics:
- A type: MT-5 .
- Number of gears: 5 .
- Gear Location: 1-2-3-4-5-R .
- type of drive: front .
- Lubricant type: transmission oil .
- Lubricant volume: 2,5 l .
- Resource aggregate: 150 000 km .
The Niva gearbox consists of the following main components and parts :
- Gear box housing: This is an aluminum die cast body, which houses all the internal components of the gearbox. The housing has holes for mounting to the engine, and so on, gear lever, sensors and gaskets.
- Gearbox shafts: these are steel shafts, on which the gears are mounted, synchronizers, bearings and friction clutches. The Niva gearbox has three shafts: primary, secondary and secondary. The input shaft is connected to the engine flywheel through the clutch and transmits torque to the output shaft. The secondary shaft connects to the driveshaft and transmits torque to the wheels. The middle shaft is used to engage reverse gear and connect four-wheel drive.
- Gearbox gears: these are steel gears, which provide different gear ratios between the shafts. The Niva gearbox has nine gears: four gears on the input shaft, four gears on the secondary shaft and one gear on the middle shaft. Gears have different diameters and number of teeth, what determines their gear ratio. Gears can be permanently meshed or freely rotating on shafts.
- Transmission synchronizers: these are mechanisms, which provide smooth and silent gear shifting. Synchronizers consist of conical couplings, which mate with the bevel surfaces of the gears, and synchronous rings, which synchronize the rotation speeds of couplings and gears. The Niva gearbox has four synchronizers: one in first and second gears, one in third and fourth gears, one in fifth gear and one in reverse gear.
- Gearbox friction clutches: these are mechanisms, which provide engagement and disengagement of gears with shafts. Friction clutches consist of internal and external splines, which interact with the splines of gears and shafts. The Niva gearbox has three friction clutches: one on the input shaft, one on the secondary shaft and one on the middle shaft. Friction clutches are controlled by the gear lever via cables and forks.
- Gearbox bearings: these are the details, which provide support and rotation of the shafts in the gearbox housing. Bearings can be radial and thrust, depending on load direction. The Niva gearbox uses ball and roller bearings of different sizes and types.
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Installing and removing the Niva gearbox
Installing and removing the Niva gearbox – these are procedures, which require certain knowledge, skills, tools and materials.
- Removing the Niva gearbox: To remove the Niva gearbox you need to follow these steps::
- Loosen the bolts securing the gearbox to the engine and to the subframe.
- Support the gearbox with a jack or stand.
- Disconnect the speed sensor wires, temperature and reverse from the gearbox.
- Unscrew the bolts securing the gearbox to the engine and to the subframe.
- Carefully remove the gearbox from its installation location and lower it onto a jack or stand..
- Clean and inspect the gearbox for damage, export, contamination and leaks.
- Installation of Niva gearbox: To install the Niva gearbox you need to follow these steps::
- Check that the type and volume of lubricant in the gearbox corresponds to the manufacturer’s requirements. If necessary, replace or add lubricant.
- Raise the gearbox on a jack or stand and carefully insert it into the installation location..
- Tighten the bolts securing the gearbox to the engine and to the subframe, without tightening them all the way.
- Connect the speed sensor wires, temperature and reverse to the gearbox.
- Tighten the bolts securing the gearbox to the engine and to the subframe to the specified torque..
- Install the clutch and release bearing.
- Install the starter and connect its wires.
- Install the driveshaft and secure it with bolts.
- Connect the cables to the forks and install the gear lever housing.
- Install the battery and connect its terminals.
- Lower the vehicle from a lift or from racks.
- Check the operation of the gearbox at idle and while driving.
Conclusion
In this article we looked at the features of the device, installations, withdrawals, Niva gearbox repair and maintenance. Niva gearbox – this is a complex and important element of the car, which requires careful and high-quality treatment. For, to ensure the durability and reliability of the Niva gearbox, operating rules must be followed, Check and replace lubricant regularly, and troubleshoot problems in a timely manner. We hope, that our article will help you in choosing, operation and repair of the Niva gearbox.
