Under what circumstances can a gearbox break?

The transmission housing is broken and damaged, which generally occurs when the vehicle is fully loaded and reversed. When reversing, you must wait for the vehicle to stop completely before you can hang the gear, not in the vehicle forward, has not stopped when the force to hang the person in reverse, especially the loading and unloading site in the uphill and downhill. When reversing, the car is not completely stopped and hangs the reverse gear, at this time, the second shaft rear end of the transmission is the first gear and the reverse gear, and the second shaft rotation direction is opposite at the moment of shifting, just the gear and the reverse gear are closest to the rear bearing of the weak housing, such as after the forced substitution of the reverse gear, a huge radial jump torque is generated (because the car is not stopped when driving forward), resulting in the rupture of the rear part of the transmission housing.

Gearbox mainly refers to the gearbox of a car.

It is divided into two types: manual and automatic, and the manual gearbox is mainly composed of gears and shafts, and the variable speed and torque are generated through different gear combinations; The automatic transmission AT is composed of a hydraulic torque converter, planetary gears and a hydraulic control system, which achieves variable torque through hydraulic transmission and gear combination.

The functions are: 1. Change the transmission ratio; 2. Under the condition that the direction of rotation of the engine remains unchanged, the car can drive backwards; 3. Use neutral gear to interrupt power transmission so that the engine can start, idle, and facilitate the transmission to shift gears or power output.

In 2015, Land Rover gearbox failures occurred frequently, and the company suspected that the owner was too anxious to drive.

Hello, the gearbox can not withstand the torque output of the engine, resulting in the transmission oil pressure is too high, and the transmission housing is ruptured and depressurized. Caused by hitting stones or uneven road surfaces and being strongly impacted by objects outside.

Hello. There are several situations in which the gearbox will break.

Vehicles are most susceptible to transmission rupture when off-road or over uneven surfaces.

Hope it helps you satisfied, thank you.

Hello. In the case of reverse gear, the car is hit and marches forward, I wish you a happy car! If my reply can help you, please help choose it, thank you very much!

Gear out-of-gear and heavy drag can cause the gearbox to crack.

Summary. The second aspect is to consider the engine, the deviation of the fixed position of the gearbox causes the vehicle to resonate, and then the shell cracks.

The gearbox housing will always crack why.

Hello, I am your exclusive technician, attentive, careful, dedicated to answering your car questions, I hope this service can help you. The gearbox housing will always crack, in this case, one is to consider the excessive load of the gearbox, and the other is to consider the structure of the mechanical gear inside the gearbox, the gap is too small to cause excessive wear of the gearbox.

One is to consider the overload of the gearbox caused by the excessive load of the vehicle.

The second aspect is to consider the engine, the deviation of the fixed position of the gearbox causes the vehicle to resonate, and then the shell cracks.

Transmission: Automobile transmission: by changing the transmission ratio and changing the rejection of the engine crankshaft, it can meet the needs of different requirements for driving wheel traction and vehicle speed under different driving conditions such as starting, accelerating, driving and overcoming various road obstacles.

It is popularly divided into manual transmission (MT), automatic transmission (AT), manual automatic transmission, and continuously variable transmission.

Easy shifting: During the car's driving, different gearbox gears are often changed to adapt to changing driving conditions. If there is no clutch to temporarily separate the engine from the gearbox, the meshing force transmission gears in the gearbox will be difficult to separate because the load is not removed, and the pressure between the meshing tooth surfaces is very high.

On the other hand, the meshing gear will be difficult to mesh due to the unequal circumferential speed of the two. Even if it is forcibly entered, it will produce a large impact on the tooth ends, which can easily damage the parts.

When the clutch is used to temporarily separate the engine and gearbox and then shift gears, the original meshing pair of gears is removed due to the load, and the pressure between the meshing surfaces is greatly reduced, and it is easy to separate. And the other pair of gears to be meshed, because the moment of inertia of the driving gear is very small after separating from the engine, the circumferential velocity of the gear to be meshed can be equal or nearly equal by adopting a suitable shift action, so as to avoid or reduce the impact between the gears.

Prevent overload of the drive train: When the car brakes urgently, the wheels suddenly and sharply reduce speed, and the drive train connected to the engine still maintains the original speed due to the inertia of rotation, which often produces a moment of inertia in the transmission system that is much greater than the engine torque, making the parts of the drive train easy to damage. Because the clutch relies on friction force to transmit torque, when the load in the drive train exceeds the torque that can be transmitted by friction force, the main and driven parts of the clutch will automatically slip, thus playing a role in preventing the drive train from overloading.

Causes of damage to automatic transmissions: 1. Do not drive in neutral gear. Otherwise, the automatic transmission loses its hydraulic lubrication, and the temperature of the automatic transmission is too high, causing wear.

When coasting in neutral gear, due to the difference between the driving speed of the car and the engine speed, the friction will be increased, the lubrication effect will be reduced, and the wear of the friction plate inside the automatic gearbox will also be accelerated.

2. The parking brake must be used for a long time to stop, otherwise it will destroy the lock and field stop mechanism of the automatic transmission, because there is a hydraulic transmission mechanism in the automatic transmission, and the liquid flow has a certain inertia, the automatic transmission will be forced for a long time or suffer from unexpected stress, and the automatic gearbox will fail or even damage the automatic transmission;

3. The car is not completely stopped, it will hang the reverse gear, which will cause the automatic gearbox to play teeth, this operation is extremely wrong, Tenghua automatic gearbox reminds that when it is serious, it will directly guide the automatic gearbox bearing to be damaged, and the working surface of the driving cylinder bearing is damaged by grinding filial piety, causing the fault phenomenon of the vehicle sounding. Before engaging the reverse gear, press the automatic transmission pedal all the way down, stop for a while, and then engage the reverse gear. It is absolutely forbidden to put the gear lever in neutral until the vehicle has come to a complete stop.

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Summary. Oil leakage There is oil seepage at the gearbox housing or oil pan, one reason is due to the aging of the seal and the poor sealing; Another reason is that the shell has trachoma due to poor manufacturing processes. Gear engine stall Hook D or R, engine stall This fault may be caused by damage to the lock-out solenoid valve or the lock-up control valve is stuck.

Gear locking The input and output signals of the gearbox are incorrect or caused by the defective components themselves or wiring, and sometimes there are problems with the communication between the gearbox computer and other system computers. No response in gear Hang D or R gear, and then release the brakes, the vehicle does not move. This is usually caused by damage to the input shaft or reverse clutch, or damage to the DR brake.

Hanging D R gear impact, driving impact during the driving process, the vehicle shift impact, impulse, is also a common fault phenomenon of automatic transmission, which may be caused by the transmission oil is too dirty, resulting in the valve body stagnation.

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The gearbox shell will always crack Why: Cracks in the gearbox shell are not a normal phenomenon, it may be a problem with the material itself, and it is caused by personal driving habits.

The following related extensions, I hope you will find it helpful: Gearbox, one of the auto parts, is a device that changes the speed ratio and direction of movement. It is used in automobiles, tractors, boats, machine tools and various machines to change the torque, speed and direction of movement transmitted from the driving shaft to the driven shaft according to different working conditions.

A geared gearbox is generally composed of a case shell and a number of gear pairs.

Still have questions? Kiss, can you talk about it specifically? Or is there anything you'd like to talk about? <>

What is the reason why car shifting always loves to break.

Oil leakage There is oil seepage at the gearbox housing or oil pan, one reason is that the seal is aging and poor sealing; Another reason is that the shell has trachoma due to poor manufacturing processes. The engine stall in gear is hung into D or R, and the fault may be caused by the damage of the locking solenoid valve or the hairpin of the locking control valve due to the ignorance of the fiber valve. Gear locking The input and output signals of the gearbox are incorrect or caused by the defective components themselves or wiring, and sometimes there are problems with the communication between the gearbox computer and other system computers.

No response in gear Hang D or R gear, and then release the brakes, the vehicle does not move. This is usually caused by damage to the input shaft or reverse clutch, or damage to the DR brake. Hanging D R gear impact, driving impact during the driving process, the vehicle shift impact, impulse, is also a common fault phenomenon of automatic transmission, which may be caused by the transmission oil is too dirty, resulting in the valve body stagnation.

Empty cars will also crack.

In this case, one is to consider the excessive load of the gearbox under one wheel, and on the other hand, consider the structure of the gears of the internal machine of the Rashirlu gearbox, and the gap is too small, resulting in excessive gearbox wear.

I've changed a few gearboxes, and the assembly is still cracked.

On the one hand, it may have something to do with the material of the shell itself, and it may be a crack caused by poor quality.

Pacific Automobile Network] If there is a crack in the shell of the automobile gearbox, it is necessary to see how big the crack in the gearbox shell is, if the shell crack is small, it can be welded, and if it is too large, it is not possible to slip and weld, it is recommended to change a gearbox, because the crack is too big and the welding will leak oil.

A ruptured gearbox will cause oil or air leakage in the car, which is very dangerous, and it is recommended to carry out a comprehensive inspection and repair. If there is damage to the end face of the box joint, the paper pad should be thickened appropriately at the damaged place, and if there is oil leakage, the sealing paper gasket should be repaired and repaired, and the same sealing paper gasket should be replaced. The main functions of the gearbox are as follows.

1. Change the transmission ratio, expand the range of the driving wheel rotation torque and speed, so as to adapt to the often changing driving conditions, and at the same time make the engine work under favorable conditions of higher power and lower fuel consumption.

2. Under the condition that the direction of rotation of the engine does not change, the car can drive backwards.

3. Use neutral gear to interrupt power transmission, so that the engine can start and change speed, and facilitate the transmission to shift gears or carry out power output.

4. The transmission is composed of a transmission mechanism and a control mechanism, and a power take-off can also be installed when necessary. There are two ways to classify: according to the way the transmission ratio changes and according to the different ways of operation.