The input shaft of the gearbox VAZ 2107: tips for the driver

The main purpose of the gearbox is to change the amount of torque. Strictly speaking, gear shifting is possible only through the operation of the gearbox. Five-speed manual gearboxes are installed on the VAZ 2107, which are distinguished by increased efficiency and a long service life. The main element of the box is the input shaft, from which the car begins to move forward.

Gearbox input shaft VAZ 2107

In total, there are three shafts in the design of the GXNUMX gearbox:

• primary;
• secondary;
• intermediate (through which the first two shafts interact).

However, the leading role is assigned to the primary one, since it is through it that the interaction of all the gears in the machine on other shafts begins.

The input shaft of the VAZ 2107 gearbox is manufactured together with a constant mesh gear. This element has oblique splines, which allows you to cling to the teeth of the shaft as clearly as possible. In addition, in addition to four gears, a synchronizer is also installed on the shaft, which allows the shaft to move simultaneously with the helical gear.

The oblique arrangement of the teeth serves for the fastest and most rigid grip during operation.

On the front of the product there are slots - it is on them that the clutch disc is located. So that the input shaft can easily rotate, it is equipped with two roller bearings:

• front - at the end of the crankshaft;
• rear - in the front wall of the gearbox housing.

The input shaft of the VAZ 2107 has strictly verified dimensions:

• the total length of the cylinder is 160 mm;
• shaft length to splined disc - 87 mm;
• diameter - 25 mm.

A small, oblong, narrow cylinder on which gears are located

How to remove the input shaft from the box

The gearbox must be installed on a flat surface so that nothing prevents its disassembly. Before starting work, it is important to clean the housing from dirt and fluid leaks so that debris does not accidentally get inside the housing.

The box looks like an elongated bell

To work, you need standard tools:

• set of wrenches;
• flat screwdriver;
• a thick bolt or screwdriver with a powerful blade.

It is necessary to pull out the input shaft from the gearbox strictly according to the regulations:

1. Pull the oil level indicator out of the box body.
2. Remove the flat washer bolt and two nuts that hold the clutch cable bracket. Remove the cable mechanism from the gearbox.
3. Unscrew the four bolts from the box cover and remove the cover.
4. Unscrew the bolt with spring washer that fixes one part of the input shaft.
5. Before you start working with the input shaft, you will need to prevent the shafts from scrolling among themselves. To do this, they need to be fixed: for example, insert a thick screwdriver between the teeth.
6. Loosen the nut securing the input shaft. It is very hard planted and can take a long time to remove.
7. After that, carefully pull the shaft out of the gearbox housing.

Photo gallery: main stages of work

Even after unscrewing the bolts, the cover will fit snugly against the case, so it will take effort to remove it

The most difficult stage of work, when you have to unscrew this nut

The input shaft must be pulled out of the box very carefully so as not to damage both the shaft itself and adjacent elements.

For further work, it will be necessary to wipe all the mechanisms in order to be able to carry out troubleshooting.

Accordingly, the installation of the input shaft in the gearbox is carried out in the reverse order of removal.

Rejection of the input shaft

When the car and gearbox are operating normally, the driver, as a rule, does not have any suspicions about the depletion of the shaft and its elements. However, if the machine starts to “bewilder”, for example, the gear does not work or the speed starts to turn on randomly, then you need to make sure that the box and, in particular, the input shaft are working.

The rejection is carried out with the gearbox removed, since only in this way it is possible to carefully examine all the details of the shaft and determine their suitability for further operation.

This gear can no longer be used and needs to be replaced.

The correct culling procedure is as follows:

1. Visual inspection of the input shaft for abrasions and deformations.
2. The general condition of the retaining rings, locking ring springs.
3. Amount of slots.
4. Scoring and burrs on the gears.

That is, a simple inspection of the mechanism allows you to determine the degree of wear of each element and, if necessary, replace them. It is important that the gears and the splined part of the input shaft do not have even the slightest damage, otherwise new parts will have to be installed.

Input shaft bearing

The gearbox of the "seven" has an amazing "survivability": for example, the box can "survive" one or even two engine overhauls, after which the car owner will have to repair it. However, there are a lot of small details in the design of the box, which, unfortunately, cannot boast of their resource. Most often, the driver has to slightly upgrade the gearbox device precisely by replacing the bearings.

Open-type metal bearings with the following characteristics are mounted on the input shaft of the VAZ 2107 box:

• manufacturer - VPZ 23 Vologda;
• article - 2107-1701033 / 2101-1701068;
• length - 120 mm;
• width - 95 mm;
• height - 95 mm.

Vologda bearings serve for a long time, as they were originally intended specifically for the design of the VAZ

The main function of the input shaft bearing is the work of the rolling support, that is, to allow the shaft to easily move along its axis.

When the Vologda bearings run out of service, drivers sometimes purchase products from other Russian companies. As practice has shown, imported bearings differ only in higher cost, and not in high quality, so there is no point in overpaying for them. And the domestic manufacturer fully complies with all the quality and durability requirements that motorists place on them.

When choosing a manufacturer, it should be borne in mind that a higher unit price does not yet indicate impeccable quality. However, four Russian factories already have a reputation as a supplier of reliable and affordable products:

• military-industrial complex plant - the approximate price for 1 bearing is 270 rubles;
• GPZ plant - the cost of the product is 190–200 rubles;
• the SPZ plant (3 GPZ) produces the most expensive analogue of Vologda bearings, the price is from 450 rubles;
• plant SPZ-4 - the pricing policy is quite loyal, the bearing for the input shaft will cost 220 rubles.

When choosing bearings for your car, you need to focus not only on their cost, but also on the brand of the manufacturer.

How to determine bearing wear

Being a composite device, any bearing can eventually begin to fall apart. Therefore, it is possible to determine its wear without disassembling the gearbox by ear and by those malfunctions in the operation of the box that the driver will immediately notice.

Signs of malfunctioning bearings of the input shaft of the VAZ 2107 gearbox can be considered:

1. Extraneous noise and crunching when the engine is running, even in neutral gear.
2. Impacts in the cavity of the box while driving, even at low speed.
3. Arbitrary switching on or off of gears.
4. The impossibility of engaging the clutch pedal due to the fact that the bearing on the shaft is jammed.

All problems with bearings can only be detected on trips, with the engine and gearbox running.

It is impossible to ignore any of these signs: if the bearing fails, this can lead to serious consequences for machine control. In addition, bearing distortions will quickly affect the operation of adjacent devices.

Replacing the bearing of the input shaft of the gearbox VAZ 2107

The easiest way to replace a worn-out element is on a removed box. On the VAZ 2107, it is possible to remove the bearing from the input shaft directly from the gearbox in the car, but this procedure is very time-consuming and lengthy.

The bearing is a device that cannot be repaired and restored. Therefore, in case of breakdowns and wear, it is necessary to replace the bearing with a new one.

For work, you need to prepare the usual tools for any driver:

• screwdriver with a powerful flat blade;
• a hammer;
• puller if necessary.

How to remove the old

With the gearbox already removed from the car, you need to remove the bell (casing) and retaining rings. You do not need to completely disassemble the box:

1. Use a screwdriver to pry off the special groove in the input shaft bearing. (it looks like a ring).
2. Pull the shaft towards you, using the bearing as a pressure support.
3. Gently pull out the bearing, periodically hitting it with a hammer.
4. After each hammer blow, it is recommended to rotate the shaft a little so that there are no dents or misalignment of the bearing.
5. As a result, after these actions, the bearing is easily removed from its support.

Removal must be carried out very carefully, as the shaft may be damaged.

The job can take from 5 to 30 minutes, depending on the effort and skill of the driver. In some cases it is necessary to use pullers, as the bearing is very tightly fitted to the shaft.

How to put in a new one

Next, you need to install a workable one in place of the old bearing. For this:

1. Press the new bearing onto the shaft with a hammer.
2. The hammer should only work on the inner ring of the bearing, otherwise it may be deformed.
3. When pressing in, it is necessary to pull the input shaft forward a little so that the bearing goes in easier.

Video: replacing the input shaft bearing on a VAZ classic

how to replace the bearing of the primary, secondary shaft at the gearbox VAZ 2108-2115

Summing up all of the above, we can say that the owner of the VAZ 2107 himself is able to carry out all the necessary work with the gearbox and input shaft. However, if you have doubts about your skills, then it is better to contact the specialists of the auto repair shops. We also note that the VAZ 2107 gearbox rarely requires any intervention and usually serves for many years without a hint of a problem.