how to fix the transmission slipping issue in my BMW 5 Series F10/F11 (2010-2017)

Solution

1. Preparation

• Gather tools and parts.
• Ensure the vehicle is parked on a level surface and the engine is off.
• Disconnect the negative battery terminal to prevent electrical shorts.

2. Check and Replace Transmission Fluid

• Tools Required: Fluid pump, 17mm socket, torque wrench, transmission fluid.
• Locate the transmission fluid fill plug and remove it with a 17mm socket.
• Using a fluid pump, add new transmission fluid until it begins to seep from the fill hole (check the owner’s manual for the correct fluid type).
• Replace the fill plug and torque it to the manufacturer's specification.

3. Replace Transmission Filter

• Tools Required: Socket set, transmission filter kit, drain pan.
• Place a drain pan under the transmission and remove the pan bolts using a socket set.
• Carefully lower the transmission pan and allow the old fluid to drain completely.
• Remove the old transmission filter and install the new one from the filter kit.
• Clean the transmission pan and replace the gasket before reattaching it.

4. Inspect and Repair Electrical Connections

• Tools Required: Multimeter, electrical contact cleaner.
• Inspect all electrical connections to the transmission for any signs of wear or corrosion.
• Use a multimeter to test for continuity and proper voltage at the transmission connectors.
• Clean any corroded contacts with electrical contact cleaner and reassemble.

5. Reconnect Battery and Test Drive

• Reconnect the negative battery terminal.
• Start the vehicle and allow it to warm up to operating temperature.
• Take the car for a test drive to ensure the transmission operates smoothly and verify that slipping has ceased.