Reverse gear falls out on VAZ 2109

Owners of used cars often encounter problems with the gearbox. More specifically, due to wear on the gears and shafts, some gears may “pop out” while driving. It doesn’t matter which gear it “knocks out” and at what speed, this is the first sign of a malfunction in the manual transmission.

Even a completely inexperienced driver will understand that the gear has jumped out. Let's look at this moment: You are driving, confidently picking up speed, when suddenly the car suddenly loses power, and the roar of the engine becomes stronger. This means that the gear you were moving in simply jumped out. Depress the clutch and engage the desired gear again.

Causes

What could be the reasons why the reverse gear in a VAZ car does not engage? In fact, there can be a lot of them, because the problem with switching gears, one way or another, lies in the transmission system and, in particular, in the gearbox itself.

Gear shift lever in a VAZ 2109 car

Incomplete release of the clutch. As a rule, if the clutch is not disengaged correctly, all speeds may not engage well, but sometimes this problem affects only the reverse gear.
The gearbox drive levers or rods are damaged. The fastening may also be loose. To eliminate such a malfunction, it is necessary to conduct a thorough inspection of the unit and transmission system. If necessary, it is recommended to replace all damaged system components.
The lubricant in the gearbox has run out. In this case, the problem with switching gears will affect all gears without exception. Therefore, the likelihood of such a problem, unless only reverse gear is engaged, is very small. As you understand, you should check the level of consumables in the system and, if necessary, add oil to the gearbox.
Bad gear oil. The transmission fluid has already lost its properties and cannot fully ensure lubrication of all gearbox components. In this case, the problem will also affect all gears without exception, although in practice there have been cases when problems occurred with engaging the reverse gear. In this case, an oil change will be required.
Poorly adjusted rocker: the gearbox rocker cardan needs to be adjusted. Due to poor adjustment of the rocker, the reverse gear sometimes not only does not engage, but also falls out. This problem is one of the most common among VAZ 2109 cars, so we will consider fixing it first.

Switch rod failure

The gear shift rod and fork are responsible for selecting the gear, transferring the corresponding load from the gearshift lever to the shafts through reciprocating movements. Although the parts have a long service life, with an intense driving style they often become unusable. And all because for normal operation they also require lubrication, which ensures ideal sliding of surfaces and eliminates friction.

The cause of rod wear may be poor-quality oil, late replacement, or expired service life of the unit. In addition to “knocking out” gears, the malfunction is also accompanied by extraneous noise and slight oil leakage.

As the rod wears out, the mating components of the assembly also wear out: hinge bushings, tips, oil seal, protective cover and clamp. Replacement is usually done as a set.

Fixing the problem

Let's look at several ways to help fix the problem with engaging reverse gear.

Backstage adjustment

Before you begin solving the problem, take with you everything you might need:

new gearbox driveshaft;
speed selector shaft oil seal;
two ring wrenches 13;
wrench 10;
hammer;
screwdriver.

To fully replace the cardan, you will need to drive into a pit or overpass. In addition, you will need an assistant who will shift the gearbox lever while you adjust it.

Let's start replacing the cardan and adjusting the rocker:

You need to crawl under the bottom of the 2109 and find your gearbox. Take two 13mm wrenches and loosen the clamp located on the transmission drive rod. After this, you can remove the drive from the gearbox mechanism rod.
Then take a screwdriver and, with a little force, pull the boot closer to the unit. If you accidentally damage the boot, you can simply dismantle it so that it does not bother you. Now take a 10mm wrench and unscrew the locking screw on the cardan.
Next, take a hammer and very carefully knock the gearbox driveshaft off the shaft. Do this carefully so as not to damage the shaft. Remove the cardan boot if you did not remove it initially. If necessary, replace the speed selector shaft oil seal.
At this point we can consider that half the work has already been done. Now you need to install the driveshaft of the box. We install the element in the reverse order. First, install the new boot in place, and then place the cardan on the shaft. Remember that the position of the retaining screw must coincide with the recess on the shaft.
When the universal joint is in place, tighten the fixing screw and install the boot on the universal joint. You also need to put the gear shift drive rod on the cardan rod, but there is no need to tighten the clamp.
Next, you will need the help of another person, since you need to adjust the gearshift lever. Ask your assistant to sit in the driver’s seat: he should set the gearshift lever to “neutral” and move it slightly to the right. In this position, an assistant should hold the lever while you tighten the cardan clamp.

When the cardan adjustment is completed, you need to check how the speeds on the lever are switched on. If the problem that caused the reverse gear to not engage in your VAZ 2109 was in the cardan, which is most likely, then after replacing the element the fault should disappear.

Changing gearbox oil

Also, one of the common reasons why reverse gear in a VAZ 2109 does not engage is poor gear oil. As stated above, the liquid has already lost its properties and its further use does not make sense. But how do you understand that the transmission fluid has already exhausted its service life? This issue should be taken seriously, because the fluid replacement procedure is not that cheap. Therefore, you need to know for sure that the gear oil has lost its properties.

What are the features of the UAZ transfer case?

This is the unit

Almost all UAZ cars have a transfer case in their design. The UAZ transfer case is designed to distribute torque to all drive mechanisms of the vehicle. As a rule, the unit is installed on off-road vehicles, that is, on SUVs. It simplifies vehicle movement in off-road conditions.

Basically, the UAZ transfer case is installed on those vehicles that have two drive axles. It distributes torque to these axles according to a specific principle, allowing the front axle to be turned on and off when necessary.

The transfer case is located next to the gearbox and is additional; sometimes a device is attached to it that increases torque. The transfer case is two-stage, its presence makes it possible to double the total number of gears and thereby operate the car in the most difficult road conditions. The unit is installed on UAZ Hunter, UAZ Patriot, UAZ “Bukhanka” and other models of this car plant.

Dispenser device

Transfer case and gearbox levers

The transfer case on an UAZ consists of the following main elements: drive shaft, differential, differential locking device, rear axle drive, gear transmission, reduction gear and front axle drive. The device is shown in Fig. 1. For the convenience of switching the transfer case, there are special levers inside the car that allow you to turn on or off the rear or front axles, or turn on both axles at the same time.

Causes of problems with gearboxes

Almost every owner of a domestic car has at least once encountered problems with partial gearbox failure. If reverse gear on your VAZ-2109 has stopped engaging, then the cause may be one of the malfunctions:

The clutch is not completely disengaged. With this problem, problems occur when all gears are engaged, but sometimes only the reverse one fails.
The gearbox levers are damaged or broken or their mountings are loose. Problems can only be resolved by diagnosing the box, as well as replacing damaged parts. In this case, moving the lever may be accompanied by a crunching sound.
If only reverse gear does not work, then with a low degree of probability it is time to claim that the transmission fluid has simply run out. Usually, with this problem, all gears do not engage. If, however, you notice that the gear oil level in the box is extremely low, then simply top it up.
In practice, there were cases when the rear “speed” could not be engaged due to the poor quality of the fluid in the gearbox. In this case, it must be replaced.
The most common problem with engaging certain gears is an unadjusted gearbox universal joint. You can notice it by this sign: at first, the backward movement was activated unclearly, and then another mode was activated instead. Later the box stopped working normally altogether.

Let's look at the last two problems in more detail, since often the problem is hidden precisely in them.

The reverse gear on the UAZ falls out

Author LeGAL leGAL asked a question in the Other Auto Topics

Tell! UAZ 469. When the reverse gear was loaded, the lever began to fly out with a crunch! And now it won’t turn on at all!? and got the best answer

Answer from Vasya [guru] kerdyk rear speed gear and fork along the way too. bulkhead for sure. Answer from Vadim [guru] The fork is most likely or the reverse speed gear itself. Answer from the Giant [guru] disassemble the gearbox Answer from Alexander Kupriyanov [guru] Wear of the reverse gear. But since when reverse gear is engaged, the first gear gear is engaged, both of them need to be changed. Definitely remove the box. Pay attention to the wear of the fork. Answer from Ivan Ivanov [guru] Same garbage 8)) 469B 85gv The frosts will pass - I’ll pull the gearbox on the weekend. uazbuka.ru to help you Answer from 3 replies [guru] Hello! Here is a selection of topics with similar questions and answers to your question: Tell me! UAZ 469. When the reverse gear was loaded, the lever began to fly out with a crunch! And now it won’t turn on at all!?

So, if engaging reverse gear is difficult or completely impossible, this breakdown is a common problem that can be encountered in different vehicles when changing gears.

Moreover, the rear does not engage both on manual and automatic transmissions (the reverse speed of the automatic transmission has disappeared). Naturally, in such a situation, it is important to discover the cause of the malfunction and eliminate the breakdown, since it is simply impossible to operate the car normally without reverse gear (the vehicle is actually deprived of reverse gear). Let's figure it out.

Features of replacing transmission fluid

Transmission oil must be changed at regular intervals, usually every 15-20 thousand kilometers. However, it may exhaust its resource earlier. This can be determined using a probe. Take a piece of white cloth and use a dipstick to transfer a drop of oil onto it. It is necessary to change the lubricant in cases where a drop of oil:

colorless or has a black tint;
contains metal particles or grains of dust;
opaque and viscous;
sticky to the touch;
absorbs into fabric for a long time;
cloudy or foamy.

Most often, reverse gear is difficult to engage if the oil has become cloudy. This is a sure sign that it has entered the engine. If the problem is not detected in a timely manner, you will soon need to carry out a complete gearbox repair or even an expensive transmission replacement.

How to change gearbox oil

If you need to change your oil, then first of all, buy it. A four-speed gearbox will require three liters of transmission fluid. You will need to pour 3.3 liters into a five-speed gearbox. If you are changing the oil for the first time, then buy 80W-85 class fluid. It is perfect for use in the VAZ-2109 gearbox. Car owners prefer to purchase Lukoil brand products.

The work of changing the oil in the box is carried out as follows:

Place the car on an overpass or over a pit, warm it up slightly so that the liquid is not viscous. Locate the oil drain plug on the bottom of the box.
The unit has a rubber cap that needs to be cleaned along with the breather. After cleaning these parts from dirt, return them to their place.
As soon as the preparatory work is completed, place the container, twist the plug with a wrench, and begin draining the transmission oil.
The waste liquid will drain completely within half an hour.
Screw on the plug, tighten it well, but do not strip the thread.
Under the hood, find the transmission dipstick and remove it. In place of the probe, stretch a hose, at the other end of which a regular watering can or funnel is installed. Pour transmission oil into the box through the hose. On older units, the fill plug is located next to the drain plug.

After the work is completed, check the lubricant level with a dipstick and take a control measurement after 2-3 days. If necessary, add oil; if it becomes critically low, inspect the box for leaks.

Why reverse gear on the VAZ- 2109 engage and what to do

Many car owners are constantly faced with gearbox problems. They can appear for various reasons. They are hidden in the gearbox system, and specifically in the gearbox itself. Let's look at why the reverse gear on the VAZ- 2109 . We will also tell you how to fix the problem.

Causes of problems with gearboxes

Almost every owner of a domestic car has at least once encountered problems with partial gearbox failure. reverse gear on your VAZ- 2109 has stopped engaging , then the cause may be one of the malfunctions:

The clutch is not completely disengaged. Reverse gear won't engage? no problems were found, Which VAZ engine is better. With this problem, problems occur when all gears are engaged, but sometimes only the rear one .
The gearbox levers are damaged or broken or their mountings are loose. Problems can only be resolved by diagnosing the box, as well as replacing damaged parts. In this case, moving the lever may be accompanied by a crunching sound.
If only reverse gear does not work, then with a low degree of probability it is time to claim that the transmission fluid has simply run out. Reverse gear won't engage? Causes. Usually, with this problem, all gears do not engage. If, however, you notice that the gear oil level in the box is extremely low, then simply top it up.
In practice, there were cases when the rear “speed” could not be engaged due to the poor quality of the fluid in the gearbox. In this case, it must be replaced.
The most common problem with engaging certain gears is an unadjusted gearbox universal joint. You can notice it by this sign: at first, the backward movement was activated unclearly, and then another mode was activated instead. Later the box stopped working normally altogether.

Wear of intermediate or driven shaft bearings

The transmission is based on a tandem shaft: intermediate and driven. Their movement is ensured by bearings. When they are new, the gaps between the rollers and the housing are within the acceptable range and amount to fractions of microns. But as the contacting elements wear out, these gaps increase, and the lubricant is filled with foreign impurities.

The problem begins to manifest itself in the form of a knocking sound - at first it is barely audible, but over time it intensifies. At a certain point, the gearbox begins to randomly push the lever into the neutral position.

Failed bearings must be replaced. This procedure is very expensive; it will require removing the box and opening the case. Along with the parts, of course, the oil must also be changed.

Replacing and adjusting the gearbox driveshaft

So, if only reverse does not work, and all other modes do not fail, then you will need to replace the universal joint and adjust it. To do this, prepare a new spare part, a gear selector shaft seal, a set of keys, a hammer and several screwdrivers of different sizes.

Carry out the work according to the instructions:

Place the machine on an overpass or over a pit. Car repair, Reverse gear on VAZ 2109 does not engage, Car repair. Find the gearbox from below and loosen the clamp bolts on its drive rod. Remove the actuator completely from the stem.
Using a screwdriver, pull the boot towards the unit. Often during this step the boot is completely damaged, in which case it can be removed and then a new one installed. Unscrew the fixing screw on the universal joint.
Carefully tap the driveshaft off the assist shaft with a hammer. Remove the boot if you have not damaged it previously. Install a new oil seal on the speed shaft.
Install a new boot, place the cardan on the shaft so that the position of the fixing screw coincides with the recess on the shaft.
Tighten the retaining screw and place the rod on the rod, but do not tighten the clamp.
To make the adjustment, ask an assistant to move the gearshift lever to the neutral position and a short distance to the right. He should hold it in this position while you tighten the clamp.

How to change gearbox oil

If you need to change your oil, then first of all, buy it. A four-speed gearbox will require three liters of transmission fluid. You will need to pour 3.3 liters into a five-speed gearbox. Why doesn't reverse gear engage on the Lada? If you are changing the oil for the first time, then buy 80W-85 class fluid. It is perfect for use in the VAZ- 2109 . Car owners prefer to purchase Lukoil brand products.

The work of changing the oil in the box is carried out as follows:

Place the car on an overpass or over a pit, warm it up slightly so that the liquid is not viscous. Locate the oil drain plug on the bottom of the box.
The unit has a rubber cap that needs to be cleaned along with the breather. After cleaning these parts from dirt, return them to their place.
As soon as the preparatory work is completed, place the container, twist the plug with a wrench, and begin draining the transmission oil.
The waste liquid will drain completely within half an hour.
Screw on the plug, tighten it well, but do not strip the thread.
Under the hood, find the transmission dipstick and remove it. In place of the probe, stretch a hose, at the other end of which a regular watering can or funnel is installed. Pour transmission oil into the box through the hose. On older units, the fill plug is located next to the drain plug.

After the work is completed, check the lubricant level with a dipstick and take a control measurement after 2-3 days. If necessary, add oil; if it becomes critically low, inspect the box for leaks.