why does my BMW 5 Series F10/F11 (2010-2017) transmission slip when shifting

Solution

1. Preparation

• Gather tools and parts necessary for the repair. Ensure the vehicle is parked on a level surface and the parking brake is engaged.
• Tools Required:
  • OBD-II scanner
  • Socket set
  • Torque wrench
  • Transmission fluid pump
  • Fluid catch pan
  • Safety glasses
  • Gloves

2. Transmission Fluid Change

• Sub-steps:
  1. Drain Fluid:
     • Place a fluid catch pan under the transmission pan.
     • Remove the transmission pan bolts using a socket wrench. Carefully tilt the pan to drain the fluid.
  2. Inspect Filter:
     • Remove the old transmission filter and inspect it for clogs or damage. Replace if necessary.
  3. Install New Filter:
     • Install the new transmission filter, ensuring it is seated correctly.
  4. Reinstall Pan:
     • Clean the transmission pan surface and apply a new gasket (if applicable).
     • Reattach the transmission pan and torque the bolts to the manufacturer’s specifications (typically around 8-10 Nm).

3. Fluid Refill

• Sub-steps:
  1. Use a transmission fluid pump to refill the transmission with the recommended type and amount of fluid (usually around 8-10 quarts for a complete change).
  2. Start the engine and let it idle for a few minutes while cycling through the gears.
  3. Check the fluid level with the dipstick and add fluid as needed to reach the proper level.

4. Test Drive

• Sub-steps:
  1. Take the vehicle for a test drive to ensure the slipping has been resolved.
  2. Monitor the transmission performance during shifts.