Diagnostics and Troubleshooting Chevrolet Niva Transmission

Auto gear switch

The transmission function is to ensure the optimal mode of operation of the motor at various modes of movement. Purpose of the gearbox (CAT) to change the frequency and torque in large limits than the engine can provide. The Chevrolet Motor Niva has 800-5400 operating rollers per minute, the maximum torque value is achieved at 3000 revolutions per minute.

In Chevrolet, the Niva has a five-speed gear shift mechanism with a trungy scheme. Mechanical CAT Niva Chevrolet 21074-1700005-40 was created on the basis of a classic gearbox 2107, but has certain differences:

• there is no lock and centering rings at the end of the secondary shaft;
• the speedometer cable drive (gear inside PPC Niva Chevrolet) is replaced by a remote sleeve;
• the bearing flange of the secondary shaft on Chevrolet Niva retains only the bearing itself, the axis of the intermediate gear is attracted to the gearbox of the gearbox.

In the car Niva Chevrolet family, the gear shift mechanism is quite often out of order, since the reliability of this unit in Russian cars leaves much to be desired. MCPP has a complex device, its replacement is quite expensive. Therefore, if repair is possible, the owners of Chevrolet Niva prefer its full replacement of the gearbox.

Oil protects the gear shift mechanism from wear

In order not to resort to radical measures as long as possible, it is recommended to monitor the oil level in the Chevrolet Niva gearbox. The change in the color of the lubricant testifies to the threatening in the near future. Normal oil is transparent and viscous. When measuring the lubrication level, scroll the substance with your fingers. So you can touch and visually determine the condition of the oxol. The manufacturer recommends changing the oil in the gearbox machine every 45 thousand km of mileage.

Replacing lubricant in the checkpoint

To replace lubrication in the Chevrolet PPC, the Niva will need:

• key on 17;
• hex key for 12;
• capacity for draining waste oil.
• Perform procedures need in a specific sequence.

Capacity arrange under the drain hole of the CPP CPP Niva Chevrolet. For easy drain, you need to unscrew the bar of the bay of the oil, then open the plum stopper and wait until all the lubrication flows into the container. Clear drain plug from dirt and screwed into the drain. Oxol, which includes various contaminants, will look like a muddy dark fluid. Before pouring fresh oil into the box, it will have to rinse it.

In the appropriate crankcase hole pour 0.9 l lubricants for washing, tighten the plug. Rear wheels post, start the engine on 1 gear. After a couple of minutes, drown out, flushing drain. Plum plug cleaned from the dirt and tighten.

Pour 1.6 l fresh lubricant. Add oil to the box is convenient with a syringe or a special device. Cork bulk hole spin into place. Lubrication from the PPC Niva Chevrolet is easily merged hot, after the trip.

When measuring the oil level after the machine passed 45-50 thousand km, the owner may find that the lubricant after filling with a terrible speed disappears somewhere. In this case, the gear shift mechanism makes grinding when the neck of the Niva moves. This is explained by the wear of the seal of the secondary shaft. Through the formed gaps between it and the shaft oil flows out of the box.

Reducing the lubrication level is fraught with increased wear and adversely affects the gear shift mechanism.

Transmission box of this car

To avoid excess spending, you need to replace the belt in Chevrolet Niva. This is a complicated, but necessary operation. For her, we need:

• key to 30;
• screwdriver;
• a hammer;
• mandrel.

Remove the transmission grinding, remove the centering ring seal and unscrew the flange nut of the elastic coupling. Remove the ring, as well as the locking washer of the flange and the helicopter itself. Between the housing of the rear cap cover and the shaft is now visible to the gland. It must be removed by screwdriver. A new seal can lubricate the sealant and pressed into place, tapping the hammer on the mandrel. As a mandrel you can use the old gland. Collect the mechanism by performing all actions in the reverse order. Different oil.

When is the repair required?

After about 50 thousand km of run, the mechanism of switching gear of Chevrolet cars of Chevrolet Niva begins to "delight" the owner of the roast and uncharacteristic noise. These are the first signs of the worn out of gears and bearings. If you carefully track how the checkpoint works, you can determine what is faulty inside the box of Niva Chevrolet:

• noise, grinding, knock when driving or warming the engine - wear bearing, gear, synchronizers, breakage of the primary shaft stopper, axial shifts of shafts;
• punch when starting or switching gear - wear connection of the secondary shaft and "helicopter";
• refusal to turn off the transmission - Kole Kpp pulled into the fork of the rod of another transmission, cried the synchronizer;
• difficult transmission switching - the lever is deformed, jumped off the scenes, deformed the forks of switching, wear gear, synchronizers, balls or sockets of the rod, breakdown of the synchronizer spring;
• chops the transfer - wear of the forks, grooves coupling under the plug, gear.

All this indicates that it is time to carry out the repair of the gearbox Niva Chevrolet. To do everything yourself, you need to know how the gear shift mechanism is arranged. Then you will be able to go through the gearbox of Shevi.

Remove gearbox

Before proceeding with the dismantling of the box, it is necessary to check whether the noise source is really the gear shift mechanism. It often happens that the unusual noise is caused by the weakening of the fastenings of the PPC covers in Chevrolet or defects in other car units. Election of the transmission may be due to the unscrewed nut on the shank box.

If during draining oil from the gearbox Niva Chevrolet, it was found that it was very small, the replacement of gears and bearings can be unprofitable. In this case, it is better to replace the entire box, and in the future carefully monitor the lubricant level in it.

But the removal of the checkpoint will have to spend anyway. To work, you need to stock:

• keys at 10.13, 19;
• hexagon key for 12;
• screwdriver;
• pasterns.

Disabled gearbox

In order to access the bottom of the car, it should be installed on the overpass or the observation pit. Then disconnect from the battery terminal "-" and drain the oil. Now you can proceed directly to the removal of the CAT.

• In the cabin remove the handles from the rope levers, the dispensing itself, the case and the gearbox cover. Remove the casing and boot from the dispensing boxes, lock sensor connectors. Remove the casing of the scenes and the gearbox switching lever. Turn on the rear gear and pull out the lock sleeve from the lower end of the lever.
• Cardanov flanges, Distribution and RPM Mark, to set them in the correct position during the assembly.
• Remove the front cardan and oil puck. Holding the bolts with a key to 19, turn away the nuts of the fastening of the elastic coupling from the transmission secondary shaft flange.
• Unscrew the nuts of the mounting of the pillows of the ruddles to the end of the studs, remove the distribution.
• Remove the pin and spring, unscrew the clutch cylinder bolts and starter mounting. To do this, you will need an extension. Starter to move away to the radiator. Disconnect the reverse lamp sensor wires, unscrew the silencer clamp bolt, bolts of crankcase casing and nut traverse.
• Remove the gearbox mounting bolts. Disconnecting the box, make sure that it does not hang on the primary shaft - it is fraught with a breakdown of the clutch disk and a spring bearing ring of the shaft. Shaking the gearbox down-up, gradually shifting back to the stop. Clutch crankcase omit, remove the scene from the hole.