Gearbox Repair: Troubleshooting

The gearbox is one of the most important components of the car, responsible for transmitting torque from the engine to the wheels. In the event of a transmission failure, its repair is a mandatory and important measure. In order to carry out an effective repair, it is necessary to correctly diagnose malfunctions, which is what we will talk about today.


Before proceeding with the diagnosis of transmission malfunctions, it is necessary to know the signs of its malfunction. Here are the most common symptoms of a failing transmission:

  • having difficulty shifting gears
  • strange sound, whistling or knocking when shifting gears
  • spontaneous disengagement of gears
  • roughness of the car when accelerating or stopping
  • increased fuel consumption
  • oil leak from gearbox
  • increased noise level while driving

Diagnostics. What to look for when carrying out maintenance

Before starting transmission troubleshooting, make sure the vehicle is on a level surface and the ignition is off. Then you need to make a visual inspection of the gearbox and check the oil level. After that, you can proceed to the main diagnosis.

When diagnosing a gearbox, pay attention to the following points:

  • clutch and clutch condition
  • gear and bearing wear
  • condition of internal splines and gears
  • condition of shift levers and cable
  • gearbox oil level

Traditional gearbox malfunctions

One of the most common transmission failures is clutch and clutch wear. In addition, wear of gears and bearings, as well as damage to internal splines and gears, can be observed. Also, a common cause of a malfunction is the wear of the levers and the gearshift cable.

Causes of Spontaneous Shutdown

If the gears turn off spontaneously, then the cause may be:

  • weak hydraulic drive of the differential lock clutch
  • incorrect operation of the gearbox
  • shaft bearing failure

Shift problems can be caused by:

  • clutch or clutch wear
  • damage to gears or bearings
  • oiling the surface of the splines
  • incorrect operation of the gearbox

Causes of Gearbox Noise

Unpleasant noise from the gearbox may occur due to:

  • bearing or gear wear
  • spline surface damage
  • improper operation of the gear shift mechanism
  • low oil level in gearbox

Causes of Oil Leaks From the Variable Gearbox

An oil leak from a variable gearbox can be caused by:

  • damage to sealing rings
  • damage to the surface of the oil pump
  • gearbox housing wear

Benefits of Repairing a Gearbox at a Service Station

If you are faced with a gearbox malfunction, then the best solution is to contact a specialized service station. Gearbox repair at the service station has the following advantages:

  • experienced specialists will make the correct diagnosis and repair of the gearbox;
  • when replacing the box, the service specialists will select the necessary model. Such parts are usually always available at the stations;
  • use of original spare parts;
  • guarantee for the work performed.

In conclusion, if you notice any signs of a gearbox malfunction, you must contact the service station in a timely manner for diagnostics and repairs. A reliable and properly functioning car is a guarantee of safety and comfort while driving.