what is the difference between the rear axle gearbox 03 and 06

Posts: 17

August 19, 2016, 07:34 pm #1 123
I recently bought a VAZ 2106 1.5 engine, 5 speed gearbox, with r15 wheels, so the gearbox is damaged (it costs a penny), tell me guys which one is better, or rather put (03) or (06) most of the route -city, one person said that if I put (06) it will be very difficult to accelerate. Give advice on how to install a gearbox without replacing r15 wheels, Best regards.

Posts: 14551
From: 66, Ekaterinburg
UAZ Hunter 315195 ZIL 5301 Bull

August 19, 2016, 20:41 #2 123+ 2

patron20, 19 August 2016, 19:34, #1

I recently bought a VAZ 2106 1.5 engine, 5-speed gearbox, with r15 wheels, and so the gearbox (costs a penny) was covered, guys, tell me which one would be better, or rather put (03) or (06) most of the highway-city, one person said that if I put (06) it will be very difficult to accelerate. Give advice on how to install a gearbox without replacing r15 wheels, Best regards.

the man told you right!

gearboxes differ in gear ratio (give the numbers of gear ratios)

And first, tell me - what do you want from the car?

In general, considering your wheels are 15, there is a 5th gear and a weak internal combustion engine - then you need a gearbox with a large gear ratio, otherwise with a fast gearbox it will be difficult to accelerate and in 5th gear it will be harder, you will have to turn the internal combustion engine to maintain normal traction mode.

Question - have you even tried to understand the essence of what you do and what you want?

with a faster gearbox and 15-wheel drive, the load on the clutch when starting off will increase.

Posts: 17

August 19, 2016, 20:54 #3 123

I took the car as a replacement from a peasant with one owner and in good condition, to drive to work (temporarily), but it so happened that now I have to travel often to the Moscow-Tula region, I don’t need to do anything there and I don’t want to, the gearbox still wanted to change since it was worth a penny (4.3) pairs, it is very difficult to travel long distances with it, but unfortunately or fortunately it began to hum, and the question arose which one to put (03) or (06) but now I understand that most likely (03) with pairs 4.1 did I understand correctly?

Posts: 14551
From: 66, Ekaterinburg
UAZ Hunter 315195 ZIL 5301 Bull

August 19, 2016, 21:06 #4 123+ 2

If the highway mode is higher, then 4.1 will be faster, but by no more than 6-8%, and the acceleration dynamics will be slightly reduced.

What does it mean “it’s very difficult to drive with him”?

Posts: 17

19 August 2016, 21:23 #5 123

Well, I meant that even though the gearbox costs 5 speeds, the speed on the highway is 90-100 km per hour, but more than 100 km is a stalemate, then the engine already has 4 thousand revolutions and is about to break, I’m talking about the 4.1 gearbox, I wanted to put (06 ) 3.9 gearbox but in the right direction, the most optimal is most likely (03) 4.1 when driving 120-130 kilometers, is it normal with it with a (03) gearbox?

Posts: 14551
From: 66, Ekaterinburg
UAZ Hunter 315195 ZIL 5301 Bull

August 19, 2016, 21:30 #6 123+ 1

120-130 km/h are guesses, you do the math and there will be a clearer picture (the wheel diameter is known, the gearbox and gearbox are known, the engine speed at which you want to drive is known - consider the calculation to be accurate to 2-3 percent of real speed)

You are unlikely to get up to a 30% increase in speed by installing gearbox 03.

How did you check the speed? Your speedometer is probably lying, the speedometer is rigidly attached to the gearbox and gearbox and has nothing to do with the actual speed.

for the UAZ Hunter there are two gearboxes, 4.1 and 4.6 - the difference in speed is only 10%, so you can’t have that with 4.3 and 4.1 the speed from 90 will rise to 120-130

Posts: 17

19 August 2016, 21:38 #7 123

So what should I install without changing the wheels, I need to sell these then buy something and everything takes time, but the gearbox needs to be installed tomorrow, what is the conclusion, what is the way out, what should I install, it’s not for a penny, the dynamics are good but it’s clean around the city or general store.

Posts: 14551
From: 66, Ekaterinburg
UAZ Hunter 315195 ZIL 5301 Bull

August 19, 2016, 21:45 #8 123+ 1

patron20, 19 August 2016, 21:38, #7

Since you don’t have enough speed with 4.3, then set it to 4.1.

To begin with, I would make a speed calculation, taking into account your 15 tires, and check the speedometer to get an idea of the picture.

Even a VAZ 2101 with a 4.3 gearbox and a 4x mortar gearbox cannot go 90 at 4000 rpm, it goes at these speeds more than 120 km/h.

Posts: 17

August 19, 2016, 21:45 #9 123

Posts: 14551
From: 66, Ekaterinburg
UAZ Hunter 315195 ZIL 5301 Bull

August 19, 2016, 21:50 #10 123+ 1

patron20, 19 August 2016, 21:45, #9

I want it, put it at 06

I'm telling you - count it!

The problem is not in the gearbox! you can safely install a 3.9 gearbox, but you have 15 tires, and this is a large size for a classic, especially for its half-dead internal combustion engine

Posts: 14551
From: 66, Ekaterinburg
UAZ Hunter 315195 ZIL 5301 Bull

August 19, 2016, 21:53 #11 123+ 1

set it to 4.1, you won’t get much speed gain, but it will pull well and go a little faster.

but you want something different from the general store, then change the car, because even a 3.9 gearbox will be like a euro general store

Posts: 17

Posts 1 page 15 of 15

ShareNovember 126, 2009 22:23:06

Author: Vasek7253
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Gearbox 2101: 3.753 2.303 1.493 1.00 2103: 3.75; 2.30; 1.49; 1.00; Z.X-3.87 G.p. 4.1 2105: 3.667 2.100 1.361 1.00 0.819 2106: 3.24; 1.98; 1.29; 1.00; Z.X-3.34 G.p. 4.1

ShareFebruary 218, 2010 12:13:44

Author: Ivanovich
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Gear ratios of VAZ gearboxes. Main gear pair 2106 (4.3) gear. number SPORT

Main gear pair 2106 (4.7) gear. number 43:9 SPORT

Main gearbox pair 2106 (5.1) gear. number 43:8 SPORT

Main gear pair 2106 (5.3) gear. number 43:8 SPORT

On early samples of 2121 with a 1.3 engine, 4.44 main pairs were installed. Until 1993, Nivas, model 2121 (1.6 engine), had main pairs with a 4.1 gear ratio. From 1993 on model 21213 (1.7 engine) to this day, main pairs with a gear ratio of 3.9 are installed.

A little information: the lower the number of the main pair, the greater the speed of the car at the same wheel radius and the same engine speed..

What are the main couples?

3.9 - VAZ-2106 has a mark on the crankcase in the form of the number 6. 4.1 4.3 4.44 - the front gearbox assembly is almost never found.

The following are only custom ones:

and further! Gearbox and rear axle of a classic VAZ. There are 3 options for gearboxes and 4 rear axle gearboxes. The gearboxes come in 2101, 2105, 2106. The gears (1st, 2nd, 3rd) in 2101 are shorter than in 2105, and longer in 2106. Gearboxes come with gear ratios of 3.9, 4.1, 4.3, 4.44. How to find out the gear ratio? Raise the rear wheel, put it in neutral, make 10 rotations of the wheel and count the revolutions of the cardan. Cardan speed 19.5 20.5 21.5 22.5 Gear ratio 3.9 4.1 4.3 4.44

ShareFebruary 318, 2010 12:26:26

Author: Ivanovich
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Rear axle VAZ 2101. Device

1 – axle shaft; 2 – wheel mounting bolt; 3 – guide pin; 4 – oil deflector; 5 – brake drum; 6 – axle bearing; 7 – locking ring; 8 – rear axle beam flange; 9 – axle shaft seal; 10 – rear axle beam; 11 – bearing mounting plate; 12 – rear brake shield; 13 – axle guide; 14 – adjusting nut; 15 – differential box bearing; 16 – bearing cover; 17 – breather; 18 – satellite; 19 – driven gear; 20 – axle gear; 21 – adjusting ring of the drive gear; 22 – spacer sleeve; 23 – drive gear bearings; 24 – drive gear oil seal; 25 – dirt deflector; 26 – flange; 27 – oil deflector; 28 – rear axle gear housing; 29 – drive gear; 30 – satellite axis; 31 – adjusting washer; 32 – differential box

Rear axle of VAZ 2101. Rear axles of VAZ-2101 cars; VAZ-2102 and their modifications have the same design and are completely unified, with the exception of gearboxes, the main gear of which has a different gear ratio. For the VAZ-2101 and its modifications it is 4.3, and for the VAZ-2102 it is 4.44. To distinguish gearboxes for station wagons, the letter “y” is applied to their neck.

As you know, cars differ in the type of drive. There is full, rear, and also front. The first models of classic VAZs came with rear-wheel drive. And the “seven” was no exception. In turn, the rear-wheel drive device includes a gearbox. The VAZ-2107 has a similar element design scheme as on the “six”. Well, let's look at what this element is for and how it works.

Replacing the rear axle gearbox of VAZ 2106, 2107

The main disease of REM is increased noise (hum), and the gearbox can hum for various reasons:

there is insufficient oil in the bridge, or it is completely missing;
the gap between the gears of the main pair is not adjusted;
the gears are worn out, they have chips and other damage;
the main pair has a manufacturing defect, the gears are not ground in from the factory;
the shank nut has become unscrewed or loosened;
bearings are worn out.

The main malfunction of the center differential is the wear of the gears of the axle shafts and satellites, when the surfaces of the parts are heavily worn, play forms between the differential gears, but the rear axle usually does not make noise due to wear of the differential gears.

ZM gearboxes on VAZ classics can be repaired, but only if there is no wear on the gears. If the mechanism can no longer be repaired, it needs to be replaced. We replace the rear axle gearbox of a VAZ 2106 on a “seven” as follows:

we install the car on a pit or a car lift; changing the gearbox on the ground is extremely inconvenient;
if the car is installed on a pit, it is necessary to jack up both sides; in any case, the rear wheels must be removed. If the work is not done on a lift, you should install stops under each side of the car (in the rear);
unscrew the drain plug in the REM, drain the transmission oil, having previously prepared a container for it;
remove the rear brake drums (two guide bolts on each side), after first removing the car from the handbrake. The drums can be difficult to remove; they are dismantled by tapping them from behind with a hammer through a wooden block. You cannot hit the drum with a metal hammer; the drum may break;

At this point, the removal of the gearbox can be considered complete; now all that remains is to either repair the mechanism or install a new one instead.

Principle of operation

On a VAZ-2107, the axle gearbox operates in the same way as on all other cars with a classic drive layout. Why classic? The answer is simple: the first cars that were produced earlier had a longitudinal engine. Thus, first came the engine, then came the gearbox, driveshaft, and the final element in the chain was the rear gearbox. VAZ-2107 is built on the same principle. But the next model 2108 has a more modern front-wheel drive layout with a transversely mounted engine. It is believed that this design is safer in terms of getting the car out of a skid. But in this case, all the nodes are concentrated in one place (that is, in the engine compartment). In the case of the “seven”, all elements are placed evenly throughout the body. So, how does the VAZ-2107 gearbox work?

Oil

It is worth noting that the VAZ-2107 gearbox, or rather its operating principle, is based on the meshing of gears. Accordingly, with constant rotation there will be significant production. To increase the service life, special oil is poured inside the gearbox. It forms a thin film behind the teeth. On the “seven” you can use thick gear oil. It is perfect not only for the gearbox, but also for the rear axle. We also note that the lubricant has a certain service life. Experts recommend changing this fluid at least once every thirty thousand kilometers.

Teeth Features

Just like a gearbox, it uses a pair of gears. The VAZ-2107 steering gear is no exception. On the “seven”, the driven and driving gears are located at an angle (that is, not straight, but helical). The main feature of the pair is less load on the teeth, smooth and quiet operation. The rear axle of the “six” and other classic VAZ models is designed using the same principle.

Cylindrical.
Conical.
Worm-shaped.

If we talk about the VAZ-2107 steering gear, then the operating principle here is based on a worm pair. As for the gearboxes themselves, they also include a hypoid gear. Here the gears, unlike bevel gears, do not lie in the same plane.

Gearbox device

The main structural elements of the “six” REM are:

main couple;
cross-axle differential.

Main couple

Structurally, the main gearbox pair is made of two gears - a drive (spike) and a driven (planet) with hypoid (spiral) tooth engagement. The use of hypoid transmission provides the following advantages:

quiet operation;
increased resource;
increased clearance.

However, this design also has its own nuances. The main gears come only in pairs and are adjusted using special equipment. During this process, all gear parameters are monitored. The main pair is marked with the serial number, model and gear ratio, as well as the date of manufacture and signature of the master. Then the final drive set is formed. Only after this the spare parts go on sale. If one of the gears breaks down, the entire main pair must be replaced.

Differential

Through the differential, torque is distributed between the drive wheels of the rear axle, ensuring their rotation without slipping. When the car turns, the outer wheel receives more torque, and the inner wheel receives less. Without a differential, the torque distribution described would not be possible. The part consists of a housing, satellites and semi-axial gears. Structurally, the unit is installed on the driven gear of the main pair. The satellites connect the side gears to the differential housing.

Other details

There are other elements in REM that are an integral part of the design:

housing - eliminates damage to the differential;
flange - the part is fixed on the bevel gear of the main pair and is intended to connect the cardan to this gear;
lip seal - is responsible for the tightness of the unit, preventing lubricant from leaking out;
bearings - provide rotation of the bevel gear and differential.

Adjusting the rear gearbox of the VAZ-2107

It is possible to change the gear ratio of the mechanism only if you completely replace the main gear and install another one, with a different ratio. This modification can increase the torque of the car. The higher the gear ratio, the more traction. However, this parameter significantly affects the speed. If you increase the torque, it will be more difficult for the car to accelerate in the range of one hundred kilometers per hour or more. But from the start it will move much faster.

Higher or lower?

Often, owners of classic Zhiguli cars use replacing the main pair as one of the types of tuning their cars. Which gearbox should I put on the VAZ-2107? It is worth choosing the gear ratio based on the engine power. If you install a pair with a low ratio (for Zhiguli the maximum parameter is 3.9), it will be easier for the car to accelerate to maximum speed. But in the range of 0-100 kilometers per hour, it will lose significant time for acceleration.

We install a gearbox with a different gear ratio

What happens if the gearbox being replaced has different parameters from the installed ones? For example, consider the gear ratios of VAZ gearboxes. The line of units is represented by four gearboxes. Their numbers fall in the range from 3.9 to 4.44.

A gearbox with a number of 3.9 will be the fastest of the family, and a gearbox with a number of 4.44 will be the most high-torque. Because in the first case, the power transmitted by the input shaft decreases only 3.9 times versus 4.44. It turns out that if the gearbox transmits torque faster, the car becomes more “nimble”. If you replace the gearbox with a version with a lower gear ratio, the car accelerates more slowly, but becomes more passable and high-torque.

When installing a gearbox with a number different from the factory number, it is imperative to check the speedometer readings. Most often he starts to lie. The problem can be solved by adjustment, and sometimes you have to change the speedometer cable. The most difficult thing when replacing a gearbox is not the removal and installation, as it might seem initially, but the adjustment and configuration. Without proper adjustment, even a properly selected gearbox can become unusable after several thousand miles.

Which gearbox should I choose, 2103 or 2106?

In the “nature” of Zhiguli gearboxes there are 4 types:

VAZ 2101 - gear ratio 4.3
VAZ 2102 - 4.4
VAZ 2103 “troika” - 4.1
VAZ 2106 “six” - 3.9.

The gear ratio is the ratio of the teeth, for example, in a “six” gearbox the large gear is marked 2106 1143. Therefore, to determine the pair, 43/11 = 3.9 is necessary. The larger the number of the pair, the more high-torque the car will be, but it will lose maximum speed. Most often, you can find two types of gearboxes in stores: with a pair of 4.3 and 3.9.

Please note: when replacing a faulty gearbox with a gearbox with a different gear ratio, it will be necessary, otherwise the speed readings on the speedometer will be incorrect.

We hang up the rear axle, drain the oil from the crankcase, remove the wheels and brake drums, and remove the axle shafts. We disconnect the driveshaft from the drive gear flange and move it to the side.
Using a “13” wrench, unscrew the eight bolts securing the gearbox housing to the rear axle beam.
Remove the gearbox assembly.
We install the new gearbox in the reverse order of removal. Apply sealant to the threaded part of the crankcase mounting bolts. After installation, do not forget to fill the rear axle housing with 75W-90 transmission oil. Crankcase volume is 1.3 liters.

Signs of gearbox problems

The rear gearbox is one of the reliable mechanisms of classic Zhiguli cars and breakdowns rarely occur with it. However, like any other unit, it may have its own malfunctions, which are determined by characteristic symptoms. They are worth dwelling on in more detail.

Noise when accelerating

If during acceleration there is an extraneous sound from the gearbox installation site, then it can be caused by:

worn out or incorrectly adjusted differential bearings. It will require dismantling, disassembling and diagnosing parts with subsequent adjustment;
Incorrect meshing of the teeth of the main pair gears. Eliminated by proper adjustment;
lack of lubrication in the gearbox. The lack of oil in the crankcase is restored, after which it is checked for leaks at the places where the sealing elements are installed.

Axle bearings are not a structural element of the gearbox, but if the part fails, then an extraneous sound may also be observed during acceleration.

Noise when accelerating and braking the engine

If noise occurs both during acceleration and during braking by the power unit, there may not be many reasons:

deterioration or failure of the bevel gear bearings of the main pair. Eliminated by replacing failed elements;
Incorrect adjustment of the gap between the tip and the planetary gear. The mechanism needs to be diagnosed and replaced with damaged parts, as well as setting the required gap between the gear teeth.

How much does a new gearbox and replacement labor cost?

The cost of the work, as always, depends on where you decide to have the repairs done. If it’s a garage-type service, then Uncle Vasya will ask you for about 1,000 rubles to replace the gearbox, but in a “sophisticated” car service center, be prepared to part with an amount of 2 to 3 thousand.

Prices for spare parts. The kit, which includes a new rear axle gearbox 2106 (Togliatti), gasket and even oil, costs about 5-6 thousand rubles (Moscow and Moscow region, AvtoPasker store).

The price for gearbox 2103 (AvtoVAZ) is not much different from 06 and is about 5,000 rubles.

Using a gearbox, torque is transmitted from the engine to the wheels. The gearbox is a set of gears and includes two main blocks: a cross-axle differential and a main gear. When replacing or repairing this module, the question may arise as to how the VAZ 2103 gearbox differs from the 2106, which do not look identical in appearance.

Gearbox repair

Almost any repair work on the “six” REM, except for replacing the oil seal, involves dismantling and disassembling the unit. Therefore, if characteristic signs of problems were noticed in the operation of the mechanism, for further actions you need to prepare a certain list of tools:

hexagon 12;
set of open-end wrenches;
thrust shoes;
jack;
rear axle stands;
container for oil.

Removing the gearbox

We remove the gearbox as follows:

We install the car on the inspection hole, placing shoes under the front wheels.
Place a suitable container under the drain hole, unscrew the plug and drain the oil.

Replacing the cuff

The RZM lip seal is changed using the following tools:

head 24;
knob;
hammer;
flat screwdriver.

To replace the oil seal, you need to remove the cardan from the gearbox side and drain the oil, then perform the following sequence of actions:

Insert bolts into the two nearest holes in the flange and screw nuts onto them.

Video: replacing the shank seal with RZM “classics”

Disassembling the gearbox

To disassemble the assembly in question, you will need the following tools:

set of wrenches;
hammer;
bearing puller.

For ease of work, the gearbox must be installed on a workbench. Disassembly is carried out in the following sequence:

We unscrew the bolt that secures the locking element of the left bearing.

Disassembling the differential

After the gearbox is disassembled, we proceed to removing parts from the differential box:

Use a puller to pull the inner race of the bearing off the box.

Defective parts

To understand the condition of the gearbox and its constituent elements, first rinse them in diesel fuel and let it drain. Diagnostics involves a visual inspection and is performed in the following order:

We inspect the condition of the gear teeth of the main pair. If the gears have severe wear, chipped teeth (at least one), the main pair needs to be replaced.

Assembly and adjustment of the gearbox

The process of assembling rare earth metals involves not only installing all the elements in their places, but also adjusting them along the way. The performance and service life of the unit directly depends on the correctness of actions. The procedure is performed in the following order:

We place the differential bearings on the box using an adapter, and then attach the planetary gear.
The semi-axial gears, together with the support washers and satellites, are treated with transmission grease and mounted in the differential box.
We rotate the installed gears so that the satellite axis can be inserted.
We measure the clearance of each gear along the axis: it should not exceed 0.1 mm. If it is larger, then we install thicker washers. The gears must rotate by hand, and the moment of resistance to rotation must be 1.5 kgf*m. If it is impossible to remove the gap even with thick washers, the gears must be replaced.

What is the difference between the VAZ 2103 gearbox and 2106?

The main difference is the different gear ratio:

The gear ratio shows how many times the wheel will turn relative to the number of revolutions of the cardan. The difference between the VAZ 2103 gearbox and the 2106 can be clearly seen by the number of teeth on the gears. The “six” has 11 teeth on the drive gear, and 43 teeth on the driven gear, while the “three” has 10 and 41, respectively. To verify this, it is not necessary to disassemble the gearbox, just look at its markings.

Many motorists believe that a gearbox with a higher gear ratio is considered traction, and one with a low gear is considered high-speed, and they try to replace one type of gearbox with another, adjusting the car to the desired parameters. But to fully modernize a car, it is not enough just to know how the VAZ 2103 gearbox differs from the 2106.

Rear axle gear ratio

Car owners become interested in the issue of gear ratios in two cases. The first one is for reference and characterizes the inquisitive. After all, the more you know about the structure of the car, the longer and more competently it will work. However, most often the gear ratio is determined in case of problems with the gearbox.

Knowing what gear ratio your car has, you can:

Always correctly replace a faulty gearbox or its parts;
understand how the car will behave when installing a gearbox with parameters different from the original factory ones.