We disassemble the UAZ 469 gearbox. Everything you need to know about the gearbox and the UAZ transfer case

The four-speed semi-synchronized gearbox of UAZ-469 and UAZ-452 families is mechanical, designed to change the torque transmitted to the drive wheels in order to obtain the best traction and dynamic qualities in these road conditions.

To do this, the gearbox has four forward gears and one reverse gear. The gearbox is equipped with inertia-type synchronizers to facilitate shifting into third and fourth gears.

Technical characteristics of the UAZ four-speed semi-synchronized gearbox.

- Center distance in mm: 80.5
- Maximum torque on the input shaft in kgcm: 17
— Number of pairs of gears of constant mesh: 3
- Helical gear module: 3
- Spur gear module: 3.5
- Splines of the input shaft of the box:
number of slots - 10
outer diameter in mm - 35-0.075, 35-0.160
inner diameter in mm - 26.5-0.52
slot width in mm - 5.385-0.05
– Weight of gearbox in kg: 34
- Filling capacity of the crankcase in l: 1.0

Four-speed semi-synchronized gearbox UAZ-469 and UAZ-452, device.

The gearbox is attached to the clutch housing with four studs screwed into the clutch. The gears of the intermediate shaft drive of the second and third gears are helical and are in constant engagement. The input shaft has two bearings. The front bearing is located in the crankshaft seat, the rear bearing is located in the front wall of the gearbox housing.

The rear bearing is fixed on the shaft with a special nut with a left-hand thread. On the inside of the crankcase, the bearing is closed by an oil deflector. Two toothed rims are cut on the back of the shaft. For ease of installation, the spur ring and part of the conical surface of the shaft have an arcuate cutout.

The secondary shaft is located behind the primary on the same axis with it and has two supports. The front shaft support is a set of rollers placed in the input shaft. The rear shaft support is a double-row angular contact ball bearing. Between the bearing and the end of the shaft is an oil deflector.

The intermediate shaft is mounted on two ball bearings, in the front and rear walls of the crankcase. The front bearing is fixed on the shaft with a special nut, which is locked by pressing its shoulder into the groove of the shaft. The rear bearing has a thrust ring on the outer race. On the shaft, the rear bearing is fixed with a cup washer and a special bolt with a left-hand thread.

The reverse gear block is mounted with a bearing assembly on an axle, which is locked in the crankcase by a special threaded pin on the side of the crankcase side hatch. The four-speed semi-synchronized gearbox of the UAZ-469 and UAZ-452 family cars has the following gear ratios: 1st gear - 4.124, 2nd gear - 2.641, 3rd gear - 1.58, 4th gear - 1.00, reverse gear - 5.224.

Gearbox Synchronizers.

Inertial type, the synchronizer mechanism is assembled on the hub. The hub has three longitudinal slots of a rectangular shape to accommodate crackers. A hole is made in the center of each groove in the radial direction.

When assembling the mechanism, springs are installed in the holes of the hub, and steel balls are installed in the holes of crackers. To exclude cases of balls falling out, the holes in the crackers are stepped. In the synchronizer, crackers are installed with the side with holes of a smaller diameter towards the clutch.

Acquisition and selection of synchronizer parts.

Gear change mechanism.

It has three shift forks, which are included in the connection with the moving elements of the gearbox. All forks are mounted on rods with bolts having a cone at the end. The rods together with the forks move in the axial direction. To fix the neutral position and the included gear, the rods have spring clamps. A locking device is installed between the rods, which prevents the simultaneous inclusion of two gears. One of the rods, taken out of neutral, locks the others.

The gear shift mechanism of the gearbox on cars of the UAZ-469 family.

All shift forks have slotted lugs that accept the shift lever. Moving the lever across the vehicle axle selects the fork, and moving the lever along the vehicle axle engages the selected gear. Between the grooves of the forks of the first - second and third - direct gears, the lever moves freely.

To insert the lever into the groove of the reverse fork, you need to overcome the resistance of the fuse. The fuse is a mushroom-shaped plunger equipped with a position lock, a return spring and a retaining ring that limits the stroke of the plunger. The fuse is closed from the outside with a cover.

On cars of the UAZ-452 family, two drive levers, a horizontal gear shift and a vertical gear selection, are installed in the side cover of the shift mechanism for gear shifting.

When the vertical lever is rotated, the clutch moves vertically on the shaft and can be installed in one of three positions. In this case, the clutch cam enters the groove of the fork for engaging the required gear. By rotating the horizontal lever, the clutch cam moves along with the rod and fork, and engages the gear.

The gear shift mechanism of the gearbox on cars of the UAZ-452 family.

The control dimensions of the gear shift forks.

Gearshift lever on cars of the UAZ-469 family.

Mounted on the upper flange of the side cover in a special removable support, fixed with four screws. A spring is installed under the shift lever in the support, which presses the lever to the support sphere. From turning around its axis, the lever is fixed by two pins pressed into the lever support and included in its grooves. Consolidation is provided with a corrugated rubber cuff. The side cover has a threaded hole for installing the reversing light switch.

The drive levers of the gearshift mechanism of the UAZ-452 family vehicles are connected by means of rods and intermediate levers to the control mechanism mounted on the air duct.

Maintenance of a four-speed semi-synchronized gearbox.

During operation, maintenance of the gearbox comes down to checking the oil level in its crankcase and replacing it on time, as well as periodically checking all threaded connections. If a leak is found, find out the cause and replace the defective parts (gaskets, cuffs).

Possible malfunctions of the gearbox and shift mechanism.

Noise in the gearbox.

- Loose gearbox mounting with clutch and gearbox housings
— Oil contaminated with solid particles
— The oil does not meet the recommended or its level is low
- Worn or broken parts

Difficulty shifting gears.

- leads, as a result of which the synchronizer blocks the transmission
- Worn parts of the synchronizer or the ball comes out of the socket
- The gear of the first gear on the secondary shaft sticks due to the seizure of the landing surface by burrs formed on the ends of the gear spline from the engagement of the second gear with blows to the teeth
- Forks and other parts of the shift mechanism are deformed

Self-switching off the transmission when the car is moving.

- Weak fit on centering surfaces as a result of wear or crushing of parts
- Worn gear bushings
- Skewed parts due to the curvature of the gear shift forks
- Worn gear teeth
— Axial play of shafts and gears from wear or loosening of fasteners

Oil leak from gearbox.

- Increased oil level in the gearbox
Foaming oil due to poor quality or water ingress
- The tightening of parts with gaskets has loosened: side cover, shift lever support, connector with box, input shaft front cover, intermediate shaft cover, or these gaskets are damaged
- Cracks in the crankcase or in the covers
— The plugs of the rod holes fell out.

About UAZ

If you are the owner of an UAZ and there are suspicions about the failure of the box, then you must definitely take up the repair. The unit breaks down when the driver has to keep the shift lever on the move when they start shifting on their own (to prevent this, drivers tie them up with ropes). Creaks are heard.

To get acquainted with the repair technology, read about the repair of the UAZ 452 gearbox yourself. First of all, you need to find the type of UAZ box that is on the car. Despite the difference between car models, they install uniform transfer boxes. Because it is that the repair is actually carried out identically. For this purpose, you will need a set of keys, some tools and aids (a list of them is given below).

The beginning of the repair of the UAZ 452 gearbox on its own: gearbox, transfer case

On most models of this type of car, both parts are one. The weight of such a node achieves 75-82 kg, therefore an assistant is needed. If on a car being repaired, of course, a safety cage, then there is an option for removing under repair Checkpoint UAZ 452 at home use a manual winch.

The car must be put on a level place, because then it will have to be moved 0.5 m forward or backward. First drain the oil. Both boxes have a common volume, but the water drain plugs are separate. While the oil is pouring out, you need to remove the front seats and unscrew them, and then remove the hatch halves to the floor of the car. Next comes the turn of removing the speedometer rods.

When the oil drains, wrap the drain plugs at their destination. Under the handbrake drum is the cross member of the frame, it must be removed. Disconnect the front axle couplings and unscrew the front cardan. If you find a weakness in the nuts, then you need to remove this part.

If the UAZ 3303 gearbox is being repaired, you need to be more careful with the couplings. The car is moved 0.5 m (in any direction) and the rear cardan is removed through the hatch. Disconnect the muffler from the distribution box and loosen the clamp it has. Then alternately remove such details as:

clutch pan;
fasteners for the oiler from the input shaft (it is located on the right, on the bell);
4 bolts that hold the clutch fork cover;
adjustment of the cylinder rod and fork.

The transfer case is wrapped with a rope and suspended. Remove the following details:

pillow bolts;
nuts holding the fastening of the box with the bell.

With these actions, the engine, when the UAZ 452 checkpoint is repaired at home, must be supported with a jack. When the box is released, it is lowered and removed from under the car. The levers must be removed in advance. On the bell, you need to change the studs with new ones.

If you need to repair the UAZ Patriot checkpoint, then you need to take into account that the location of the box and the bell is reversed there. This also applies to the location of the rods. But completely do-it-yourself development for the repair of the UAZ 452 checkpoint is suitable for use.

UAZ Loaf checkpoint repair (removal, repair, installation)

UAZ 469. Gearbox repair. Part 1

Features of disassembly semi-synchronized gearboxes. Partial defect. Support the project.

Unscrew the bolts and nuts, disconnect the gearbox and its transfer case. A gasket is installed between them, reinforced with sealant, so you will have to hit the bracket for attaching the assembly to the frame several times.

Checkpoint diagram UAZ Patriot

Disassembly and assembly on their own

at first must be removed input shaft cover and unscrew the left nut that is on it (see Fig.). Now we need to remove its bearing. If it fails, it must be replaced. Its roller "brother" is installed inside the shaft, it also needs to be changed. Then the retaining ring is removed from the secondary roll. Unscrew the stopper of the double row bearing. The shaft must be knocked out and the part changed.

Next comes the third gear clutch assembly. Copper synchronizers are replaced along with crackers. Then comes the turn of the reverse gear. Unscrew the intermediate shaft front bearing box. Do not hit it with a hammer or a core: it is made of silumin and may crack.

Be careful not to damage its rubber seal because it is difficult to get it out. On the removed shaft, the gears and all bearings are replaced. After that, the box is assembled in the reverse order. When the roller is installed on the input shaft, it is abundantly lubricated with Litol. All nodes and parts are put in place one by one, so as not to be mistaken.

Transfer case, complete assembly of the gear unit and its installation

Loosen the nuts of the flanges and shafts, remove them. The hand brake must be checked for operability, if necessary, it must be replaced. Remove all covers and replace seals. Unscrew the speedometer rod drive and breather (its need to be replaced). Check bearings and change if necessary.

The assembly of the transfer case is done in the reverse order. These steps are repeated when working with other types of this brand of car (including when repairing the UAZ Hunter gearbox). Install the mounting bracket to the frame. They put the transfer case on the parking brake drum and, holding it by the gear, lower it into place through the power take-off hatch.

Before this, a lock washer is placed from the intermediate shaft. They tighten the bolts and nuts, put on the cover with levers and check the operation of all gears. They change the release bearing, remove the levers, drag the entire assembly under the car and hang it on a rope. Put the release bearing assembly on the box and strengthen the spring. Then the input shaft and clutch are inserted. This is done in the following way:

move the box up and down;
turn the engine by the flywheel;
put the node in place;
attach pillows.

The oiler of the splines of the input shaft and the fork are attached in place, the speedometer drive, universal joints, handbrake, and covers are put in their place. In place, it is necessary to return the cross member of the frame and fix the muffler bracket to the transfer case.

The hand brake is adjusted and adjusted, the oil is changed. If the UAZ Hunter gearbox is being repaired, you may need not only these actions, but also adjustment of the rods. Screw the hatch on the floor, put the seats. This completes the repair of the UAZ 452 checkpoint on its own.

Tools and materials

For work you will need:

open-end wrenches from 10 to 22;
puller for bearings;
screwdrivers (phillips and flat);
platypuses (with bent noses and straight ones);
copper pin;
a piece of pipe as a key handle;
chisel and core;
hammer and mounting blade;
small jars for collecting nuts and screws;
socket wrenches from 10 to 36;
lithol;
red sealant;
a set of gaskets and retaining rings for the car.

In order to properly repair the UAZ 452 gearbox on their own, it is necessary to strictly adhere to the sequence of actions described above. Difficulties in the repair of other models of this brand may be caused by a different arrangement of the main parts of the machine, for example, rods. The oil change must be carried out in accordance with the technical requirements for this type of vehicle.

Do-it-yourself UAZ 469 gearbox repair is a feasible task for a person who wants to save money. Other UAZ owners (for example, UAZ loaf) can take note of all of the above and make repairs gearboxes UAZ, given some difference in the details and the location of the rods.

Post Views: 3

UAZ-469 is one of the cargo-passenger vehicles, which are distinguished by an increased level of cross-country ability. The car was produced by the Ulyanovsk Automobile Plant. In addition to the UAZ-469, the automobile plant presented such models as the UAZ 452 (loaf), UAZ Patriot.

Transmission Feature

On the UAZ 469, the gearbox is mechanical, designed for 4 steps. At the same time, the 4-speed gearbox is equipped with synchronizers. They are needed to implement speed equalization. Shafts are present, while the input shaft is based on two supports. The countershaft drive gears are helical. To absorb the occurrence of radial and axial loads during movement, the rear shaft support includes a double-row angular contact ball bearing. Such a checkpoint allows the vehicle to move in reverse. The vehicle is equipped with a transfer case. The UAZ 469 transfer case includes drive axle shafts, gears, which have a long working life.

Gearbox diagram UAZ 469 Transfer case diagram

The advantage of a manual transmission is that it is designed for a long service life. A car that has off-road qualities and is equipped with a manual transmission is great for off-road use.

UAZ 469 gearbox, inside view

Carrying out diagnostics of the UAZ 469 checkpoint

The car is subject to diagnostics if its control has deteriorated. In parallel, squeaks can be heard when changing gears. Also, it is necessary to check the condition of the box if the gears are activated spontaneously. In some cases, it is necessary to replace bearings, gears to solve the problem with the occurrence of noise. With the tightness of the gear change, the synchronizers are checked. The main reason why there is a need to replace the component parts of the box on an SUV is their natural wear and tear.

One of the signs that the transfer case should be checked if the grip of the wheels with the road has deteriorated, while the noise from it began to increase. Leads to the repair of the gearbox on the UAZ 469 improper use of the vehicle. In particular, it is necessary to carry out timely replacement of gear oil.

Another problem that a UAZ driver may encounter is oil leakage from the gearbox. This manifestation is the result of the presence of an increased oil level in the gearbox. Also, if water gets into the system while refueling the box with new fuel, the motorist will soon face the problem of fluid leakage from the gearbox. However, not only the use of low-quality oil can be the reason that leaks will be noted, since there may be a crack on the crankcase or in the cover of the UAZ 469 gearbox.

Thus, the UAZ 469 speed box includes many working units that ensure the optimal functioning of the automotive system. Given this, the owner of the vehicle must subject the car to regular maintenance. This will reduce the risk of premature repair of the UAZ 469 gearbox.

Do-it-yourself dismantling of the speed box

What locksmith tools are needed to repair the gearbox? To carry out repairs, you should get a whole repair kit. In particular, you will need open-end wrenches, socket wrenches, a hammer, screwdrivers, a mounting blade.

It should be noted the large weight of the box, all due to the fact that the device has a message with a dispenser. Given this, the dismantling of the box should not be done alone.

How to remove the box? To start the procedure for the withdrawal of the checkpoint, you must perform the following steps:

UAZ becomes a viewing hole.
The gear oil is drained (this will slightly lighten the weight of the box).
In the cabin, the seats are dismantled.
The clutch release fork, frame, cardan shaft, speedometer shaft, clutch pan, muffler adjacent to the transfer case must be removed. The hood must be removed.
The transfer case must be disconnected from the main gearbox. As a rule, the handout is wrapped with a rope and hung up.
All consumable parts (bolts, nuts, etc.) are unscrewed.
Since the UAZ gearbox is fixed on the fasteners, they must be unscrewed and the box can be removed from the slots.

The UAZ gearbox is assembled in the reverse order.

When the seized box is disassembled, it is necessary to check the integrity of all components. Deformed elements must be replaced.

An important part of any car is the gearbox, with the help of which it is possible to change the speed of the vehicle. Cars that come from the Ulyanovsk conveyor and are called UAZ-3163 are also equipped with a Dymos or Daimos gearbox. This element is a Korean-made five-speed manual gearbox.

This unit on any car does not require frequent repairs and maintenance. All that is needed to maintain this undemanding mechanism on the UAZ Patriot SUV is periodic monitoring and oil changes. Over time, the gearbox shows the first signs of malfunctions, as a result of which, as a result of the discovery of which, repairs should be carried out immediately, otherwise the entire mechanism will need to be replaced, which is an expensive element. Today we will consider the procedure for disassembling the Daimos gearbox on the UAZ Patriot SUV and find out in which cases it is necessary to repair this unit.

Design and features of the device

On the UAZ Patriot SUV, the Dymos gearbox is a mechanism inside which there is a set of gears of various diameters. The drive mechanism, presented in the form of a lever and brought into the interior of the car, allows you to change the gears while driving, which actually makes it possible to develop a high speed of the car. The gearbox design diagram is shown below.

During the operation of the UAZ Patriot car, it is important to periodically diagnose the gearbox, or rather, check for a certain oil level. Oil is the lubricant in which the device functions. The oil level may be low due to defective seals and gaskets, which must be replaced before new oil is added. The oil change period for a new one is 60 thousand kilometers, as recommended by the manufacturer.

The gearbox is not a demanding mechanism and does not need to be adjusted. Periodically, it is necessary to check the fastening of the device, as constant vibrations can provoke self-unscrewing of bolted connections. In case of detection of such malfunctions as:

spontaneous knocking out of the transmission;
problematic inclusion;
extraneous noise during the operation of the device;
impossibility of inclusion of this or that transmission.

All these signs are important reasons that in the future the gearbox may fail at all. Therefore, if one of these reasons is found, the device should be disassembled and the appropriate repair should be carried out (replacement of gears or wings). Let's consider what is the dismantling of the Dymos gearbox on the UAZ Patriot SUV.

Gearbox disassembly

Before proceeding with the disassembly of the gearbox, this mechanism, together with the transfer case, should be removed from the car. How this is done can be found in the relevant material. Let's proceed to the consideration of the process of disassembling the checkpoint on the UAZ Patriot SUV.

Initially, the bearing yoke 5 and the bearing 6 itself (indicated in the diagram above) located on the box shaft must be dismantled.
The next stage involves the dismantling of the cover of the mechanism responsible for gear shifting. The cover is removed together with the shift lever.
A sensor for turning off the light signaling when reversing is installed on the gearbox structure, which is also subject to dismantling. It must be unscrewed with a wrench.
The rod head pin is removed, using a test with a hammer. You should also unscrew the bolt number 1 (photo below), which is the axis of the intermediate reverse gear.
The flanged bolted connections are unscrewed, after which, using a large magnet, remove the springs and plungers inside.
We proceed to the process of dismantling the input shaft bearing cover, having previously unscrewed the bolted connections.
Before removing the bearing from the input shaft, it is necessary to dismantle the snap ring number 2.
The front crankcase of the Daimos manual transmission of the UAZ Patriot SUV is removed. To do this, unscrew the bolted connections shown by the arrows.
From the side of the output shaft, the following elements should be dismantled:
1. retaining ring 1;
2. protective ring 2;
3. two retaining half rings 3;
4. large retaining ring 4.
The bolt number 1 is unscrewed, which is the axis of the reverse intermediate gear. After unscrewing it, the axle should be dismantled.
With the help of a thin breakdown, it is necessary to press out the locking pins, and then remove the gearshift rods. Locking pins must be replaced with new ones after removal.
To carry out the separation of the rear crankcase from the secondary shaft, it is necessary to hang the device by the secondary shaft. After that, the rear wall of the crankcase should be heated until it is separated.
The heating time should be about 5 minutes at a temperature of 400 degrees. After warming up the cover, the shafts should be separated using a hammer.

If you are the owner of an UAZ and there are suspicions about the failure of the gearbox, then you must definitely take up the repair. The unit breaks down when the driver has to keep the shift lever on the move when they start shifting on their own (to prevent this, drivers tie them up with ropes). Sometimes squeaks are heard.

To get acquainted with the repair technology, read about do-it-yourself gearbox repair. First you need to determine the type of UAZ box that is on the car. Despite the difference between car models, the same transfer boxes are installed on them. Therefore, we can assume that the repair is carried out almost the same way. This will require a set of keys, some tools and aids (their list is given below).

The beginning of the repair of the UAZ 452 gearbox on its own: gearbox, transfer case

On most models of this type of car, both parts are one piece. The weight of such a knot reaches 75-82 kg, so you will need an assistant. If the car being repaired has a safety cage, then you can use a manual winch to remove the UAZ 452 gearbox for repair on your own.

The machine must be put on level ground, since subsequently it will have to be moved 0.5 m forward or backward. Drain the oil first. Both boxes have a common volume, but the fluid drain plugs are separate. While the oil is pouring out, you need to remove the front seats and unscrew them, and then remove the hatch halves to the floor of the car. Next comes the turn of removing the speedometer rods.

When the oil drains, wrap the drain plugs in place. Under the handbrake drum is the frame cross member, it must be removed. Disconnect the front axle couplings and unscrew the front cardan. If you find a weakness of the nuts on it, then you need to remove this part.

clutch pan;
fasteners for the oiler from the input shaft (it is located on the right, on the bell);
4 bolts that hold the clutch fork cover;
adjustment of the cylinder rod and fork.

The transfer case is wrapped with a rope and suspended. Remove the following items:

pillow bolts;
nuts holding the fastening of the box with the bell.

With these actions, the engine, when the UAZ 452 checkpoint is being repaired on its own, must be supported with a jack. When the box is released, it is lowered and removed from under the car. The levers must first be removed. On the bell, you need to replace the studs with new ones.

If you need to repair the UAZ Patriot checkpoint, then you need to take into account that the location of the box and the bell is reversed there. This also applies to the location of the rods. But in general, the technology for repairing the UAZ 452 checkpoint on its own is suitable for use.

Checkpoint diagram UAZ Patriot

Do-it-yourself disassembly and assembly

First you need to remove the input shaft cover and unscrew the left nut that is on it (see Fig.). Now we need to remove its bearing. If it fails, it must be replaced. Its roller "brother" is installed inside the shaft, it also needs to be changed. Then the retaining ring is removed from the secondary roll. Unscrew the stopper of the double row bearing. The shaft must be knocked out and the part changed.

Transfer case, complete assembly of the gear unit and its installation

Loosen the nuts of the flanges and shafts, remove them. The hand brake must be checked for operability, if necessary, it must be replaced. Remove all covers and replace seals. Unscrew the speedometer rod drive and the breather (it must be replaced). Check bearings and change if necessary.

The assembly of the transfer case is done in the reverse order. These steps are repeated when working with other types of this car brand (including when). Install the mounting bracket to the frame. They put the transfer case on the parking brake drum and, holding it by the gear, lower it into place through the power take-off hatch.

move the box up and down;
turn the engine by the flywheel;
put the node in place;
attach pillows.