how to fix a transmission that slips in my BMW 5 Series F10/F11 (2010-2017)

Solution

1. Preparation

• Gather all necessary tools and parts.
• Park the vehicle on a level surface and engage the parking brake.
• Disconnect the battery to ensure safety during repairs.

2. Change Transmission Fluid and Filter

1. Drain the Old Fluid

   • Place a drain pan under the transmission pan.
   • Remove the transmission pan bolts with a socket set and let the old fluid drain completely.

2. Replace the Transmission Filter

   • Remove the old transmission filter from the valve body by unscrewing it.
   • Install the new transmission filter, ensuring it is properly seated and secured.

3. Clean the Transmission Pan

   • Thoroughly clean the transmission pan to remove any debris or old gasket material.
   • Inspect the magnet inside the pan for metal shavings.

4. Install New Gasket and Pan

   • Apply a new gasket or gasket maker to the transmission pan.
   • Reinstall the pan and torque the bolts to the manufacturer's specifications (typically around 10-12 Nm).

3. Refill Transmission Fluid

1. Add New Transmission Fluid

   • Using a funnel, refill the transmission with new fluid (consult the owner’s manual for the correct type and quantity, typically around 8-10 quarts of ATF).
   • Start the engine and allow it to idle, shifting through all gears to circulate the fluid.

2. Check Fluid Level

   • With the engine running, check the fluid level using the dipstick (if available).
   • Add more fluid if necessary until it reaches the correct level.