Repairs and replacements of gearboxes and reduction boxes

What does transmission repair in BMW consist of?

Transmission repair depends on the type of damage and the type of transmission (manual, automatic, SMG). Spare parts for manual and automatic transmissions are not available on modern BMW models since 2000. Only specialized services undertake repairs of the above-mentioned transmissions.

In the case of automatic transmissions, services cooperating with the transmission manufacturer ZF have spare parts, oils and technical documentation necessary for repairs. For manual transmissions, both parts and documentation are unavailable. Repair usually means replacing the transmission with a new one or a working used one.

When should the transmission in a BMW be replaced?

In the case of manual transmissions, faults associated with difficulty in engaging any gear spontaneously jumping out of gear while driving or very noisy operation of the transmission indicate that the transmission is defective.

In the case of an automatic transmission, the most favorable form of repair is its reconditioning. Replacement of the transmission usually occurs in the case of total destruction, cracked housing or unavailable spare parts.

What is and what is a reduction gearbox repair in a BMW?

The reduction box is a component that provides front-wheel drive connection when driving on slippery roads and when accelerating the vehicle to speeds of around 50 km/h.

Repair of the reduction box depends on the extent of its damage and is only possible to replace the control motor and the mounting cushion. In the BMW catalog, the lack of available spare parts makes it impossible to repair it and makes it necessary to replace it.

When should the reduction gearbox in a BMW be replaced?

Replacement is recommended when the transmission is permanently damaged. The following effects may then occur:

• jerking of the vehicle during straight and cornering driving
• lighting of the 4×4 indicator light
• permanent error of the reduction box during computer diagnosis

In what time will the gearbox/reduction gearbox be repaired or replaced?

Transmission replacement time depends on the model and ranges from 3 to 8 hours.

The time to replace the reduction gearbox depends on the vehicle model and is usually around 4 hours.

What components make up the cost of repairing or replacing a transmission/reduction gearbox?

The cost of replacing a reduction gearbox is the cost of the part itself, the cost of labor, oil and computer adaptation.